Some standard content:
National Standard of the People's Republic of China
Industry
Industry
Red phosphorus
Red phosphorus for industrial use Subject content and scope of application
GB4947-90||tt ||Replaces GB4947-85
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of industrial red phosphorus. This standard applies to industrial red phosphorus produced from yellow phosphorus. This product is mainly used in pesticides, matches, metallurgy and other industries. Molecular formula: (P),
2 Reference standard
GB190
GB191
GB601
GB603
GB6003
GB6678
3 Technical requirements
Dangerous goods packaging mark
Packaging, storage and transportation pictorial mark
Chemical reagent
Chemical reagent
Test sieve| |tt||Preparation of standard solutions for titration analysis (volume analysis) Preparation of preparations and products used in test methods General principles for sampling chemical products
3.1 Appearance: dark red powder, some with metallic luster. 3.2 Industrial red phosphorus should meet the requirements in the following table:
Indicator items
Red phosphorus content (in P), %
Yellow phosphorus content (in P), %||tt ||Free acid content (calculated as H, PO.), %
Moisture content, %
Fineness passed 250 km test sieve %
Passed 1.7mm test sieve, %|| tt||Test method
Superior product
99.0
0.005
0.30
0.20
50
100|| tt||refers to
standard
first-class product
98.5
0.005
0.50
0. 25
50
100
Qualified products
97.5
0.010
0.80
0.30
50
100| |tt|| For the reagents and water used in this standard, unless other requirements are noted, analytically pure reagents and distilled water or water of equivalent purity are used. The standard solutions, preparations and products required in the test shall be prepared in accordance with the provisions of GB601 and GB603 unless other regulations are specified. 4.1 Determination of red phosphorus content
4.1.1 Method summary
Approved by the State Administration of Technical Supervision on 1990-12-30 and implemented on 1991-12-01
GB4947-90
Red phosphorus is oxidized to phosphate with bromine-saturated nitric acid and potassium nitrate, and the phosphorus content is determined using quinoline phosphomolybdate gravimetric method in acidic medium. 4.1.2 Reagents and materials
4.1.2.1 Hydrochloric acid (GB622):
4.1.2.2 Potassium chlorate (GB645);
Bromine-saturated nitric acid: Combine nitric acid (GB626) with less Mix the bromine evenly. If there is brown-red bromine in the lower part of the solution, it means that the nitric acid is saturated with bromine. 4.1.2.3
tt||Solution 1: Dissolve 70g sodium molybdate (HG3-1087) in 150mL water. Solution 2: Dissolve 60g citric acid (HG3-1108) in a mixture of 150mL water and 85mL nitric acid (GB626). Solution 3: Slowly add Solution 1 to Solution 2 with constant stirring. Solution 4: Add 5mL of quinoline to a mixture of 35mL of nitric acid and 100mL of water. Solution 5: Add solution 4 to solution 3, mix well and leave for 24 hours, then filter. Add 280mL acetone (GB686) to the filtrate, dilute it with water to 1000mL, mix well, and store it in a polyethylene bottle in a dark place. This is the quinolone reagent. 4.1.2.5 Nitric acid (GB626); 1+1 solution. 4.1.3 Instruments and equipment
4.1.3.1 Pot filter: filter plate pore size 5~15μm; 4.1.3.2 Electric heating drying oven: the temperature can be controlled at 180±5℃ or 250±10℃. 4.1.4 Analysis steps
After carefully and quickly grinding the 50g sample (to prevent burning and moisture), weigh 0.5g with a weighing bottle, accurate to 0.0002g, place it in a 300mL Erlenmeyer flask, and moisten it with water , add 30mL of bromine-saturated nitric acid using a funnel in the fume hood, leave it for 1 hour, and heat on an electric hot plate (or in a water bath) until the bromine color disappears. After cooling, add 1g potassium chlorate and 30mL hydrochloric acid, leave it for 10 minutes, rinse the funnel with a small amount of water, and then remove it. Slowly heat the solution to about 10 mL, add 200 mL of hot water, and transfer the entire solution to a 500 mL volumetric flask. After cooling, dilute with water to the mark, shake well, dry filter, and discard the initial 30 mL of filtrate. Use a pipette to transfer 10 mL of the filtrate into a 400 mL beaker, add 80 mL of water, 10 mL of nitric acid solution and 50 mL of quinolinone reagent, cover with a watch glass, and heat in a water bath until the temperature of the contents of the cup reaches 75 ± 5°C, and hold for 30 seconds. (Do not use an open flame when heating, and do not stir when adding reagents or heating to avoid the formation of clots). Cool to room temperature and stir 3 to 4 times during the cooling process. Use a filter with a constant weight of 180±5℃ (or 250±10℃) to filter the supernatant, wash the precipitate 5 to 6 times with the pouring method, use about 20mL of water each time, transfer the precipitate to a crucible, and continue Wash with water 3 to 4 times. Place the crucible in an electric drying oven at 180 ± 5°C and bake for 45 minutes (or 250 ± 10°C for 15 minutes). Take it out, cool it to room temperature in a desiccator, and weigh it to the nearest 0.0002g. Do a blank test at the same time.
4.1.5 Expression of analysis results
The red phosphorus (calculated as P) content (X,) expressed as mass percentage is calculated according to formula (1): X = (ml - mo) × 0 . 014 00
0×100-(A+B×0.3160)
m×500
10
70ml
mo
m
Where: m1
mo
m
0.014 00-
A
B-
0.3160| |tt||(A+0.316B)
The mass of the precipitate generated by the test solution, 8;
The mass of the precipitate generated by the blank test, 8;
The mass of the sample,;| |tt||Coefficient for converting quinoline phosphomolybdate into phosphorus;
The percentage content of yellow phosphorus (in P) in the sample;
The free acid in the sample (in H:PO. Calculated) percentage content; phosphoric acid to phosphorus conversion coefficient.
(1)
The result is expressed to one decimal place.
4.1.6 Allowable difference
GB4947-90
The difference between two parallel measurement results shall not be greater than 0.3%, and the arithmetic mean shall be taken as the measurement result. Note: During rapid analysis, add bromine-saturated nitric acid to the sample and wait until the reaction eases before placing it on an electric hot plate for heating. However, arbitration analysis must comply with this standard. 4.2 Determination of yellow phosphorus content
4.2.1 Method summary
The yellow phosphorus in red phosphorus is dissolved with benzene. Silver nitrate is added to the benzene solution containing yellow phosphorus to form a yellow color. Use a limited colorimeter method determination. 4.2.2 Reagents and materials
4.2.2.1 Benzene (GB690);
4.2.2.2 Absolute ethanol (GB678);
4.2.2.3 Silver nitrate (GB670): 20g/ L absolute ethanol solution; 4.2.2.4 Preparation of yellow phosphorus standard solution:
Solution 1: Weigh a 50mL volumetric flask with a ground stopper containing 30mL of benzene, accurate to 0.0002g. Use tweezers to take about 0.025g of pure industrial yellow phosphorus (GB7816) and wash it in absolute ethanol. After taking it out, quickly dry it with filter paper, put it into a volumetric flask and weigh it again. Calculate the sample amount of yellow phosphorus based on the difference between the two weighings. Leave it for a day and night. After all the yellow phosphorus is dissolved, dilute it to the mark with benzene and shake well. Calculate the yellow phosphorus content in 1 mL of solution. Store this solution sealed in a dark place.
Solution 2: Dilute solution 1 with benzene to prepare yellow phosphorus standard solution (0.01 mgP/mL). .4.2.3 Analysis steps
Weigh 5g sample, accurate to 0.01g, place it in a dry 100mL Erlenmeyer flask with a ground stopper, add 30mL benzene, cover the bottle stopper and shake for 30 minutes, dry filter into a 50mL volumetric flask, wash the precipitate three times with benzene (about 3mL each time), transfer Precipitate onto the filter paper and wash twice. Collect the filtrate and washing liquid in the same volumetric flask, dilute to volume with benzene, and shake well. Use a pipette to transfer 2 mL into a colorimetric tube pre-filled with 20 mL benzene, add 2 mL absolute ethanol, mix the solution, add 2 drops of silver nitrate solution, add benzene to the mark, shake well, and leave for 5 minutes to test the solution. The color should not be darker than the standard solution. The standard solution is for superior and first-class products. Take 1 mL of yellow phosphorus standard solution 2. For qualified products, take 2 mL and place it in a colorimetric tube. Start with "add 2 mL of absolute ethanol" and process it the same way as the test solution at the same time. 4.3 Determination of free acid content
4.3.1 Method summary
In the presence of sodium chloride, use phenolphthalein as the indicator and use sodium hydroxide standard titration solution to determine the acid content. 4.3.2 Reagents and materials
4.3.2.1 Sodium chloride (GB1266).
4.3.2.2 Sodium hydroxide (GB629)c (NaOH) is approximately 0.1mol/L standard titration solution. 4.3.2.3 Phenolphthalein: 10g/L absolute ethanol solution. 4.3.3 Instruments and equipment
4.3.3.1 Microburette: 5mL.
4.3.4 Analysis steps
Weigh 10g sample, accurate to 0.01g, place it in a 250mL volumetric flask, add water to two-thirds of the bottle volume, shake for 30min, and dilute with water to Scale and shake well. Dry filter, discard the initial filtrate, use a pipette to transfer 100mL of the filtrate, place it in a 250mL Erlenmeyer flask, add 10g of sodium chloride and dissolve it, add two drops of phenolphthalein indicator, and titrate with sodium hydroxide standard titration solution to reddish color as the end point. Do a blank test at the same time.
4.3.5 Expression of analysis results
The free acid (based on HsPO,) content (X2) expressed as mass percentage is calculated according to formula (2): GB4947-90
c (V- Vo) X 0. 049 00 × 100 = 12. 25 (V= V) :c——Concentration of sodium hydroxide standard titration solution, mol/L; volume of sodium hydroxide standard titration solution consumed by a test solution, mL; V. —The volume of sodium hydroxide standard titration solution consumed in the blank test, nL; sample mass, g;
0.04900
(2)
and 1.00mL sodium hydroxide standard titration solution (c(NaOH)=1.000mol/L) is equivalent to the mass of phosphoric acid in grams. The results obtained are expressed to 2 decimal places.
4.3.6 Allowable difference
The difference between two parallel measurement results shall not be greater than 0.03%, and the arithmetic mean shall be taken as the measurement result. 4.4 Determination of moisture content
4.4.1 Instruments and equipment
4.4.1.1 Weighing bottle: diameter 60mm, height 30mm; 4.4.1.2 Vacuum electric drying oven: temperature controllable 65~70℃, The vacuum degree is 630~730mmHg. 4.4.2 Analysis steps
Method 1 (for analysis and arbitration): Use a weighing bottle with a constant weight to weigh 10g of the sample, accurate to 0.0002g, place it in a vacuum drying oven, and place it in a vacuum drying oven at 65 to 70 Dry for 2 hours at ℃ and .630~730mmHg vacuum, take it out, place it in a desiccator to cool to room temperature, and weigh it to the nearest 0.0002g.
Method 2: Use a weighing bottle that has been dried in a sulfuric acid desiccator to a constant weight to weigh 10g of the sample, accurate to 0.0002g, and place it in a sulfuric acid desiccator to dry to a constant weight.
4.4.3 Expression of analysis results
The moisture (Xs) expressed as mass percentage is calculated according to formula (3): Mass, g; m--the mass of the sample, g.
The result is expressed to 2 decimal places.
4.4.4 Allowable difference
m
m
m
The difference between two parallel measurement results is not greater than 0.03%, and the arithmetic mean is The measurement results. 4.5 Determination of fineness
4.5.1 Instruments and equipment
4.5.1.1 Test sieve (GB6003): R40/3 series $200×50mm/250μm and Φ200×50/1.7mm. 4.5.2 Analysis steps
(3)
Weigh 50g sample, accurate to 0.1g, place it in a 500mL beaker, add 300mL tap water, stir with a glass rod to help disperse, and put the sample Move it into the test sieve and rinse with slow-flowing tap water until there are no red phosphorus particles in the washing water. When measuring with a 1.7mm test sieve, no red phosphorus particles are allowed to remain on the sieve. Place the 250um test sieve and the sieve residue in an electric drying oven at 80-90°C for 2 hours, cool to room temperature in the desiccator, and weigh the sieve residue to the nearest 0.1g. 4.5.3 Expression of analysis results
Fineness expressed as mass percentage (passing 250 μm test sieve) (X,) is calculated according to formula (4): m-ml×100
X||tt ||(4)
In the formula: m-mass of sample, g;
ml——mass of sieve residue, g.
The results are expressed to single digits.
4.5.4 Allowable difference
GB4947-90
The difference between two parallel measurement results shall not be greater than 1%, and the arithmetic mean shall be taken as the result. 5 Inspection Rules
5.1 Industrial red phosphorus shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all industrial red phosphorus shipped out of the factory meets the requirements of this standard. Each batch of products leaving the factory should be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that product quality complies with this standard, and this standard number. 5.2 The user unit has the right to inspect and accept the industrial red phosphorus received in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 10t. 5.4 Determine the number of sampling buckets according to Article 6.6 of GB6678. When sampling, take one bag from each sampling barrel, insert the sampler vertically from the center of the bag to 3/4 of the depth of the material layer, and take a sample. The total sampling volume shall not be less than 1kg. Mix the sample evenly, divide it into about 500g using the quartering method, and put it into two clean, dry bottles with ground stoppers. The bottle mouths should be sealed, and labels should be attached to the bottles to indicate: manufacturer name, product name. , grade, batch number, sampling date and sampler’s name. One bottle is used for testing and the other bottle is kept for future reference.
5.5 If one indicator of the inspection result does not meet the requirements of this standard, samples from twice the amount of packaging units should be re-sampled for inspection. If the inspection result is that even one indicator does not meet the requirements of this standard, the entire batch of products Cannot be accepted. 5.6 When the supply and demand parties have objections to product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration and Inspection". 6 Marking, packaging, transportation and storage
6.1 The packaging barrel should be firmly and clearly marked, indicating: manufacturer name, product name, grade, net weight, batch number or production date, trademark and this standard number. And affix the "Flammable Solids" sign according to Figure 6 of GB190, and the "Handle with Care" and "No Rolling" icons according to Figures 1 and 8 of GB191.
6.2 The outer packaging of industrial red phosphorus is an iron drum with a skin thickness of 0.7~1.0mm. The inside and outside of the drum are painted, and the packaging capacity is 50kg. The inner packaging is 10 plastic bags, each bag is 5kg, and the bag mouth is tied tightly. With the user's consent, it can also be packed in plastic bags. There is no red phosphorus powder allowed outside the bag or inside the barrel, and the lid must be tightly sealed.
6.3 Industrial red phosphorus is a dangerous and flammable item. It must be transported in a covered vehicle. During transportation, it must be handled with care to prevent impact and exposure. Rolling shipping and dropping are strictly prohibited.
6.4 Industrial red phosphorus is stored in a ventilated, dry, and away from heat source warehouse, and must not be mixed with oxidants. 6.5 Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.5. Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.5. Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.5. Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.5. Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.1 Method summary
In the presence of sodium chloride, use phenolphthalein as the indicator and use sodium hydroxide standard titration solution to determine the acid content. 4.3.2 Reagents and materials
4.3.2.1 Sodium chloride (GB1266).
4.3.2.2 Sodium hydroxide (GB629)c (NaOH) is approximately 0.1mol/L standard titration solution. 4.3.2.3 Phenolphthalein: 10g/L absolute ethanol solution. 4.3.3 Instruments and equipment
4.3.3.1 Microburette: 5mL.
4.3.4 Analysis steps
Weigh 10g sample, accurate to 0.01g, place it in a 250mL volumetric flask, add water to two-thirds of the bottle volume, shake for 30min, and dilute with water to Scale and shake well. Dry filter, discard the initial filtrate, use a pipette to transfer 100mL of the filtrate, place it in a 250mL Erlenmeyer flask, add 10g of sodium chloride and dissolve it, add two drops of phenolphthalein indicator, and titrate with sodium hydroxide standard titration solution to reddish color as the end point. Do a blank test at the same time.
4.3.5 Expression of analysis results
The free acid (based on HsPO,) content (X2) expressed as mass percentage is calculated according to formula (2): GB4947-90
c (V- Vo) X 0. 049 00 × 100 = 12. 25 (V= V) :c——Concentration of sodium hydroxide standard titration solution, mol/L; volume of sodium hydroxide standard titration solution consumed by a test solution, mL; V. —The volume of sodium hydroxide standard titration solution consumed in the blank test, nL; sample mass, g;
0.04900
(2)
and 1.00mL sodium hydroxide standard titration solution (c(NaOH)=1.000mol/L) is equivalent to the mass of phosphoric acid in grams. The results obtained are expressed to 2 decimal places.
4.3.6 Allowable difference
The difference between two parallel measurement results shall not be greater than 0.03%, and the arithmetic mean shall be taken as the measurement result. 4.4 Determination of moisture content
4.4.1 Instruments and equipment
4.4.1.1 Weighing bottle: diameter 60mm, height 30mm; 4.4.1.2 Vacuum electric drying oven: temperature controllable 65~70℃, The vacuum degree is 630~730mmHg. 4.4.2 Analysis steps
Method 1 (for analysis and arbitration): Use a weighing bottle with a constant weight to weigh 10g of the sample, accurate to 0.0002g, place it in a vacuum drying oven, and place it in a vacuum drying oven at 65 to 70 Dry for 2 hours at ℃ and .630~730mmHg vacuum, take it out, place it in a desiccator to cool to room temperature, and weigh it to the nearest 0.0002g.
Method 2: Use a weighing bottle that has been dried in a sulfuric acid desiccator to a constant weight to weigh 10g of the sample, accurate to 0.0002g, and place it in a sulfuric acid desiccator to dry to a constant weight.
4.4.3 Expression of analysis results
The moisture (Xs) expressed as mass percentage is calculated according to formula (3): Mass, g; m--the mass of the sample, g.
The result is expressed to 2 decimal places.
4.4.4 Allowable difference
m
m
m
The difference between two parallel measurement results is not greater than 0.03%, and the arithmetic mean is The measurement results. 4.5 Determination of fineness
4.5.1 Instruments and equipment
4.5.1.1 Test sieve (GB6003): R40/3 series $200×50mm/250μm and Φ200×50/1.7mm. 4.5.2 Analysis steps
(3)
Weigh 50g sample, accurate to 0.1g, place it in a 500mL beaker, add 300mL tap water, stir with a glass rod to help disperse, and put the sample Move it into the test sieve and rinse with slow-flowing tap water until there are no red phosphorus particles in the washing water. When measuring with a 1.7mm test sieve, no red phosphorus particles are allowed to remain on the sieve. Place the 250um test sieve and the sieve residue in an electric drying oven at 80-90°C for 2 hours, cool to room temperature in the desiccator, and weigh the sieve residue to the nearest 0.1g. 4.5.3 Expression of analysis results
Fineness expressed as mass percentage (passing 250 μm test sieve) (X,) is calculated according to formula (4): m-ml×100
X||tt ||(4)
In the formula: m-mass of sample, g;
ml——mass of sieve residue, g.
The results are expressed to single digits.
4.5.4 Allowable difference
GB4947-90
The difference between two parallel measurement results shall not be greater than 1%, and the arithmetic mean shall be taken as the result. 5 Inspection Rules
5.1 Industrial red phosphorus shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all industrial red phosphorus shipped out of the factory meets the requirements of this standard. Each batch of products leaving the factory should be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that product quality complies with this standard, and this standard number. 5.2 The user unit has the right to inspect and accept the industrial red phosphorus received in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 10t. 5.4 Determine the number of sampling buckets according to Article 6.6 of GB6678. When sampling, take one bag from each sampling barrel, insert the sampler vertically from the center of the bag to 3/4 of the depth of the material layer, and take a sample. The total sampling volume shall not be less than 1kg. Mix the sample evenly, divide it into about 500g using the quartering method, and put it into two clean, dry bottles with ground stoppers. The bottle mouths should be sealed, and labels should be attached to the bottles to indicate: manufacturer name, product name. , grade, batch number, sampling date and sampler’s name. One bottle is used for testing and the other bottle is kept for future reference.
5.5 If one indicator of the inspection result does not meet the requirements of this standard, samples from twice the amount of packaging units should be re-sampled for inspection. If the inspection result is that even one indicator does not meet the requirements of this standard, the entire batch of products Cannot be accepted. 5.6 When the supply and demand parties have objections to product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration and Inspection". 6 Marking, packaging, transportation and storage
6.1 The packaging barrel should be firmly and clearly marked, indicating: manufacturer name, product name, grade, net weight, batch number or production date, trademark and this standard number. And paste the "Flammable Solids" sign according to Figure 6 of GB190, and the "Handle with Care" and "No Rolling" icons according to Figures 1 and 8 of GB191.
6.2 The outer packaging of industrial red phosphorus is an iron drum with a skin thickness of 0.7~1.0mm. The inside and outside of the drum are painted, and the packaging capacity is 50kg. The inner packaging is 10 plastic bags, each bag is 5kg, and the bag mouth is tied tightly. With the consent of the user, it can also be packed in plastic bags. There is no red phosphorus powder allowed outside the bag or inside the barrel, and the lid must be tightly sealed.
6.3 Industrial red phosphorus is a dangerous and flammable item. It must be transported in a covered vehicle. During transportation, it must be handled with care to prevent impact and exposure. Rolling shipping and dropping are strictly prohibited.
6.4 Industrial red phosphorus is stored in a ventilated, dry, and away from heat source warehouse, and must not be mixed with oxidants. 6.5 Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.1 Method summary
In the presence of sodium chloride, use phenolphthalein as the indicator and use sodium hydroxide standard titration solution to determine the acid content. 4.3.2 Reagents and materials
4.3.2.1 Sodium chloride (GB1266).
4.3.2.2 Sodium hydroxide (GB629)c (NaOH) is approximately 0.1mol/L standard titration solution. 4.3.2.3 Phenolphthalein: 10g/L absolute ethanol solution. 4.3.3 Instruments and equipment
4.3.3.1 Microburette: 5mL.
4.3.4 Analysis steps
Weigh 10g sample, accurate to 0.01g, place it in a 250mL volumetric flask, add water to two-thirds of the bottle volume, shake for 30min, and dilute with water to Scale and shake well. Dry filter, discard the initial filtrate, use a pipette to transfer 100mL of the filtrate, place it in a 250mL Erlenmeyer flask, add 10g of sodium chloride and dissolve it, add two drops of phenolphthalein indicator, and titrate with sodium hydroxide standard titration solution to reddish color as the end point. Do a blank test at the same time.
4.3.5 Expression of analysis results
The free acid (based on HsPO,) content (X2) expressed as mass percentage is calculated according to formula (2): GB4947-90
c (V- Vo) X 0. 049 00 × 100 = 12. 25 (V= V) :c——Concentration of sodium hydroxide standard titration solution, mol/L; volume of sodium hydroxide standard titration solution consumed by a test solution, mL; V. —The volume of sodium hydroxide standard titration solution consumed in the blank test, nL; sample mass, g;
0.04900
(2)
and 1.00mL sodium hydroxide standard titration solution (c(NaOH)=1.000mol/L) is equivalent to the mass of phosphoric acid in grams. The results obtained are expressed to 2 decimal places.
4.3.6 Allowable difference
The difference between two parallel measurement results shall not be greater than 0.03%, and the arithmetic mean shall be taken as the measurement result. 4.4 Determination of moisture content
4.4.1 Instruments and equipment
4.4.1.1 Weighing bottle: diameter 60mm, height 30mm; 4.4.1.2 Vacuum electric drying oven: temperature controllable 65~70℃, The vacuum degree is 630~730mmHg. 4.4.2 Analysis steps
Method 1 (for analysis and arbitration): Use a weighing bottle with a constant weight to weigh 10g of the sample, accurate to 0.0002g, place it in a vacuum drying oven, and place it in a vacuum drying oven at 65 to 70 Dry for 2 hours at ℃ and .630~730mmHg vacuum, take it out, place it in a desiccator to cool to room temperature, and weigh it to the nearest 0.0002g.
Method 2: Use a weighing bottle that has been dried in a sulfuric acid desiccator to a constant weight to weigh 10g of the sample, accurate to 0.0002g, and place it in a sulfuric acid desiccator to dry to a constant weight.
4.4.3 Expression of analysis results
The moisture (Xs) expressed as mass percentage is calculated according to formula (3): Mass, g; m--the mass of the sample, g.
The result is expressed to 2 decimal places.
4.4.4 Allowable difference
m
m
m
The difference between two parallel measurement results is not greater than 0.03%, and the arithmetic mean is The measurement results. 4.5 Determination of fineness
4.5.1 Instruments and equipment
4.5.1.1 Test sieve (GB6003): R40/3 series $200×50mm/250μm and Φ200×50/1.7mm. 4.5.2 Analysis steps
(3)
Weigh 50g sample, accurate to 0.1g, place it in a 500mL beaker, add 300mL tap water, stir with a glass rod to help disperse, and put the sample Move it into the test sieve and rinse with slow-flowing tap water until there are no red phosphorus particles in the washing water. When measuring with a 1.7mm test sieve, no red phosphorus particles are allowed to remain on the sieve. Place the 250um test sieve and the sieve residue in an electric drying oven at 80-90°C for 2 hours, cool to room temperature in the desiccator, and weigh the sieve residue to the nearest 0.1g. 4.5.3 Expression of analysis results
Fineness expressed as mass percentage (passing 250 μm test sieve) (X,) is calculated according to formula (4): m-ml×100
X||tt ||(4)
In the formula: m-mass of sample, g;
ml——mass of sieve residue, g.
The results are expressed to single digits.
4.5.4 Allowable difference
GB4947-90
The difference between two parallel measurement results shall not be greater than 1%, and the arithmetic mean shall be taken as the result. 5 Inspection Rules
5.1 Industrial red phosphorus shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all industrial red phosphorus shipped out of the factory meets the requirements of this standard. Each batch of products leaving the factory should be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that product quality complies with this standard, and this standard number. 5.2 The user unit has the right to inspect and accept the industrial red phosphorus received in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 10t. 5.4 Determine the number of sampling buckets according to Article 6.6 of GB6678. When sampling, take one bag from each sampling barrel, insert the sampler vertically from the center of the bag to 3/4 of the depth of the material layer, and take a sample. The total sampling volume shall not be less than 1kg. Mix the sample evenly, divide it into about 500g using the quartering method, and put it into two clean, dry bottles with ground stoppers. The bottle mouths should be sealed, and labels should be attached to the bottles to indicate: manufacturer name, product name. , grade, batch number, sampling date and sampler’s name. One bottle is used for testing and the other bottle is kept for future reference.
5.5 If one indicator of the inspection result does not meet the requirements of this standard, samples from twice the amount of packaging units should be re-sampled for inspection. If the inspection result is that even one indicator does not meet the requirements of this standard, the entire batch of products Cannot be accepted. 5.6 When the supply and demand parties have objections to product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration and Inspection". 6 Marking, packaging, transportation and storage
6.1 The packaging barrel should be firmly and clearly marked, indicating: manufacturer name, product name, grade, net weight, batch number or production date, trademark and this standard number. And paste the "Flammable Solids" sign according to Figure 6 of GB190, and the "Handle with Care" and "No Rolling" icons according to Figures 1 and 8 of GB191.
6.2 The outer packaging of industrial red phosphorus is an iron drum with a skin thickness of 0.7~1.0mm. The inside and outside of the drum are painted, and the packaging capacity is 50kg. The inner packaging is 10 plastic bags, each bag is 5kg, and the bag mouth is tied tightly. With the consent of the user, it can also be packed in plastic bags. There is no red phosphorus powder allowed outside the bag or inside the barrel, and the lid must be tightly sealed.
6.3 Industrial red phosphorus is a dangerous and flammable item. It must be transported in a covered vehicle. During transportation, it must be handled with care to prevent impact and exposure. Rolling shipping and dropping are strictly prohibited.
6.4 Industrial red phosphorus is stored in a ventilated, dry, and away from heat source warehouse, and must not be mixed with oxidants. 6.5 Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.5 Expression of analysis results
The free acid (based on HsPO,) content (X2) expressed as mass percentage is calculated according to formula (2): GB4947-90
c(V- Vo) X 0 . 049 00 × 100 = 12. 25 (V= V) Concentration of standard titration solution, mol/L; volume of sodium hydroxide standard titration solution consumed by one test solution, mL; V. —The volume of sodium hydroxide standard titration solution consumed in the blank test, nL; sample mass, g;
0.04900
(2)
and 1.00mL sodium hydroxide standard titration solution (c(NaOH)=1.000mol/L) is equivalent to the mass of phosphoric acid in grams. The results obtained are expressed to 2 decimal places.
4.3.6 Allowable difference
The difference between two parallel measurement results shall not be greater than 0.03%, and the arithmetic mean shall be taken as the measurement result. 4.4 Determination of moisture content
4.4.1 Instruments and equipment
4.4.1.1 Weighing bottle: diameter 60mm, height 30mm; 4.4.1.2 Vacuum electric drying oven: temperature controllable 65~70℃, The vacuum degree is 630~730mmHg. 4.4.2 Analysis steps
Method 1 (for analysis and arbitration): Use a weighing bottle with a constant weight to weigh 10g of the sample, accurate to 0.0002g, place it in a vacuum drying oven, and place it in a vacuum drying oven at 65 to 70 Dry for 2 hours at ℃ and .630~730mmHg vacuum, take it out, place it in a desiccator to cool to room temperature, and weigh it to the nearest 0.0002g.
Method 2: Use a weighing bottle that has been dried in a sulfuric acid desiccator to a constant weight to weigh 10g of the sample, accurate to 0.0002g, and place it in a sulfuric acid desiccator to dry to a constant weight.
4.4.3 Expression of analysis results
The moisture (Xs) expressed as mass percentage is calculated according to formula (3): Mass, g; m--the mass of the sample, g.
The result is expressed to 2 decimal places.
4.4.4 Allowable difference
m
m
m
The difference between two parallel measurement results is not greater than 0.03%, and the arithmetic mean is The measurement results. 4.5 Determination of fineness
4.5.1 Instruments and equipment
4.5.1.1 Test sieve (GB6003): R40/3 series $200×50mm/250μm and Φ200×50/1.7mm. 4.5.2 Analysis steps
(3)
Weigh 50g sample, accurate to 0.1g, place it in a 500mL beaker, add 300mL tap water, stir with a glass rod to help disperse, and put the sample Move it into the test sieve and rinse with slow-flowing tap water until there are no red phosphorus particles in the washing water. When measuring with a 1.7mm test sieve, no red phosphorus particles are allowed to remain on the sieve. Place the 250um test sieve and the sieve residue in an electric drying oven at 80-90°C for 2 hours, cool to room temperature in the desiccator, and weigh the sieve residue to the nearest 0.1g. 4.5.3 Expression of analysis results
Fineness expressed as mass percentage (passing 250 μm test sieve) (X,) is calculated according to formula (4): m-ml×100
X||tt ||(4)
In the formula: m-mass of sample, g;
ml——mass of sieve residue, g.
The results are expressed to single digits.
4.5.4 Allowable difference
GB4947-90
The difference between two parallel measurement results shall not be greater than 1%, and the arithmetic mean shall be taken as the result. 5 Inspection Rules
5.1 Industrial red phosphorus shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all industrial red phosphorus shipped out of the factory meets the requirements of this standard. Each batch of products leaving the factory should be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that product quality complies with this standard, and this standard number. 5.2 The user unit has the right to inspect and accept the industrial red phosphorus received in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 10t. 5.4 Determine the number of sampling buckets according to Article 6.6 of GB6678. When sampling, take one bag from each sampling barrel, insert the sampler vertically from the center of the bag to 3/4 of the depth of the material layer, and take a sample. The total sampling volume shall not be less than 1kg. Mix the sample evenly, divide it into about 500g using the quartering method, and put it into two clean, dry bottles with ground stoppers. The bottle mouths should be sealed, and labels should be attached to the bottles to indicate: manufacturer name, product name. , grade, batch number, sampling date and sampler’s name. One bottle is used for testing and the other bottle is kept for future reference.
5.5 If one indicator of the inspection result does not meet the requirements of this standard, samples from twice the amount of packaging units should be re-sampled for inspection. If the inspection result is that even one indicator does not meet the requirements of this standard, the entire batch of products Cannot be accepted. 5.6 When the supply and demand parties have objections to product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration and Inspection". 6 Marking, packaging, transportation and storage
6.1 The packaging barrel should be firmly and clearly marked, indicating: manufacturer name, product name, grade, net weight, batch number or production date, trademark and this standard number. And paste the "Flammable Solids" sign according to Figure 6 of GB190, and the "Handle with Care" and "No Rolling" icons according to Figures 1 and 8 of GB191.
6.2 The outer packaging of industrial red phosphorus is an iron drum with a skin thickness of 0.7~1.0mm. The inside and outside of the drum are painted, and the packaging capacity is 50kg. The inner packaging is 10 plastic bags, each bag is 5kg, and the bag mouth is tied tightly. With the user's consent, it can also be packed in plastic bags. There is no red phosphorus powder allowed outside the bag or inside the barrel, and the lid must be tightly sealed.
6.3 Industrial red phosphorus is a dangerous and flammable item. It must be transported in a covered vehicle. During transportation, it must be handled with care to prevent impact and exposure. Rolling shipping and dropping are strictly prohibited.
6.4 Industrial red phosphorus is stored in a ventilated, dry, and away from heat source warehouse, and must not be mixed with oxidants. 6.5 Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.5 Expression of analysis results
The free acid (based on HsPO,) content (X2) expressed as mass percentage is calculated according to formula (2): GB4947-90
c(V- Vo) X 0 . 049 00 × 100 = 12. 25 (V= V) Concentration of standard titration solution, mol/L; volume of sodium hydroxide standard titration solution consumed by one test solution, mL; V. —The volume of sodium hydroxide standard titration solution consumed in the blank test, nL; sample mass, g;
0.04900
(2)
and 1.00mL sodium hydroxide standard titration solution (c(NaOH)=1.000mol/L) is equivalent to the mass of phosphoric acid in grams. The results obtained are expressed to 2 decimal places.
4.3.6 Allowable difference
The difference between two parallel measurement results shall not be greater than 0.03%, and the arithmetic mean shall be taken as the measurement result. 4.4 Determination of moisture content
4.4.1 Instruments and equipment
4.4.1.1 Weighing bottle: diameter 60mm, height 30mm; 4.4.1.2 Vacuum electric drying oven: temperature controllable 65~70℃, The vacuum degree is 630~730mmHg. 4.4.2 Analysis steps
Method 1 (for analysis and arbitration): Use a weighing bottle with a constant weight to weigh 10g of the sample, accurate to 0.0002g, place it in a vacuum drying oven, and place it in a vacuum drying oven at 65 to 70 Dry for 2 hours at ℃ and .630~730mmHg vacuum, take it out, place it in a desiccator to cool to room temperature, and weigh it to the nearest 0.0002g.
Method 2: Use a weighing bottle that has been dried in a sulfuric acid desiccator to a constant weight to weigh 10g of the sample, accurate to 0.0002g, and place it in a sulfuric acid desiccator to dry to a constant weight.
4.4.3 Expression of analysis results
The moisture (Xs) expressed as mass percentage is calculated according to formula (3): Mass, g; m--the mass of the sample, g.
The result is expressed to 2 decimal places.
4.4.4 Allowable difference
m
m
m
The difference between two parallel measurement results is not greater than 0.03%, and the arithmetic mean is The measurement results. 4.5 Determination of fineness
4.5.1 Instruments and equipment
4.5.1.1 Test sieve (GB6003): R40/3 series $200×50mm/250μm and Φ200×50/1.7mm. 4.5.2 Analysis steps
(3)
Weigh 50g sample, accurate to 0.1g, place it in a 500mL beaker, add 300mL tap water, stir with a glass rod to help disperse, and put the sample Move it into the test sieve and rinse with slow-flowing tap water until there are no red phosphorus particles in the washing water. When measuring with a 1.7mm test sieve, no red phosphorus particles are allowed to remain on the sieve. Place the 250um test sieve and the sieve residue in an electric drying oven at 80-90°C for 2 hours, cool to room temperature in the desiccator, and weigh the sieve residue to the nearest 0.1g. 4.5.3 Expression of analysis results
Fineness expressed as mass percentage (passing 250 μm test sieve) (X,) is calculated according to formula (4): m-ml×100
X||tt ||(4)
In the formula: m-mass of sample, g;
ml——mass of sieve residue, g.
The results are expressed to single digits.
4.5.4 Allowable difference
GB4947-90
The difference between two parallel measurement results shall not be greater than 1%, and the arithmetic mean shall be taken as the result. 5 Inspection Rules
5.1 Industrial red phosphorus shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all industrial red phosphorus shipped out of the factory meets the requirements of this standard. Each batch of products leaving the factory should be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that product quality complies with this standard, and this standard number. 5.2 The user unit has the right to inspect and accept the industrial red phosphorus received in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 10t. 5.4 Determine the number of sampling buckets according to Article 6.6 of GB6678. When sampling, take one bag from each sampling barrel, insert the sampler vertically from the center of the bag to 3/4 of the depth of the material layer, and take a sample. The total sampling volume shall not be less than 1kg. Mix the sample evenly, divide it into about 500g using the quartering method, and put it into two clean, dry bottles with ground stoppers. The bottle mouths should be sealed, and labels should be attached to the bottles to indicate: manufacturer name, product name. , grade, batch number, sampling date and sampler’s name. One bottle is used for testing and the other bottle is kept for future reference.
5.5 If one indicator of the inspection result does not meet the requirements of this standard, samples from twice the amount of packaging units should be re-sampled for inspection. If the inspection result is that even one indicator does not meet the requirements of this standard, the entire batch of products Cannot be accepted. 5.6 When the supply and demand parties have objections to product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration and Inspection". 6 Marking, packaging, transportation and storage
6.1 The packaging barrel should be firmly and clearly marked, indicating: manufacturer name, product name, grade, net weight, batch number or production date, trademark and this standard number. And paste the "Flammable Solids" sign according to Figure 6 of GB190, and the "Handle with Care" and "No Rolling" icons according to Figures 1 and 8 of GB191.
6.2 The outer packaging of industrial red phosphorus is an iron drum with a skin thickness of 0.7~1.0mm. The inside and outside of the drum are painted, and the packaging capacity is 50kg. The inner packaging is 10 plastic bags, each bag is 5kg, and the bag mouth is tied tightly. With the user's consent, it can also be packed in plastic bags. There is no red phosphorus powder allowed outside the bag or inside the barrel, and the lid must be tightly sealed.
6.3 Industrial red phosphorus is a dangerous and flammable item. It must be transported in a covered vehicle. During transportation, it must be handled with care to prevent impact and exposure. Rolling shipping and dropping are strictly prohibited.
6.4 Industrial red phosphorus is stored in a ventilated, dry, and away from heat source warehouse, and must not be mixed with oxidants. 6.5 Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.3 Expression of analysis results
Moisture content (Xs) expressed as mass percentage is calculated according to formula (3): Mass of sample, g.
The result is expressed to 2 decimal places.
4.4.4 Allowable difference
m
m
m
The difference between two parallel measurement results is not greater than 0.03%, and the arithmetic mean is The measurement results. 4.5 Determination of fineness
4.5.1 Instruments and equipment
4.5.1.1 Test sieve (GB6003): R40/3 series $200×50mm/250μm and Φ200×50/1.7mm. 4.5.2 Analysis steps
(3)
Weigh 50g sample, accurate to 0.1g, place it in a 500mL beaker, add 300mL tap water, stir with a glass rod to help disperse, and put the sample Move it into the test sieve and rinse with slow-flowing tap water until there are no red phosphorus particles in the washing water. When measuring with a 1.7mm test sieve, no red phosphorus particles are allowed to remain on the sieve. Place the 250um test sieve and the sieve residue in an electric drying oven at 80-90°C for 2 hours, cool to room temperature in the desiccator, and weigh the sieve residue to the nearest 0.1g. 4.5.3 Expression of analysis results
Fineness expressed as mass percentage (passing 250 μm test sieve) (X,) is calculated according to formula (4): m-ml×100
X||tt ||(4)
In the formula: m-mass of sample, g;
ml——mass of sieve residue, g.
The results are expressed to single digits.
4.5.4 Allowable difference
GB4947-90
The difference between two parallel measurement results shall not be greater than 1%, and the arithmetic mean shall be taken as the result. 5 Inspection Rules
5.1 Industrial red phosphorus shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all industrial red phosphorus shipped out of the factory meets the requirements of this standard. Each batch of products leaving the factory should be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that product quality complies with this standard, and this standard number. 5.2 The user unit has the right to inspect and accept the industrial red phosphorus received in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 10t. 5.4 Determine the number of sampling buckets according to Article 6.6 of GB6678. When sampling, take one bag from each sampling barrel, insert the sampler vertically from the center of the bag to 3/4 of the depth of the material layer, and take a sample. The total sampling volume shall not be less than 1kg. Mix the sample evenly, divide it into about 500g using the quartering method, and put it into two clean, dry bottles with ground stoppers. The bottle mouths should be sealed, and labels should be attached to the bottles to indicate: manufacturer name, product name. , grade, batch number, sampling date and sampler’s name. One bottle is used for testing and the other bottle is kept for future reference.
5.5 If one indicator of the inspection result does not meet the requirements of this standard, samples from twice the amount of packaging units should be re-sampled for inspection. If the inspection result is that even one indicator does not meet the requirements of this standard, the entire batch of products Cannot be accepted. 5.6 When the supply and demand parties have objections to product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration and Inspection". 6 Marking, packaging, transportation and storage
6.1 The packaging barrel should be firmly and clearly marked, indicating: manufacturer name, product name, grade, net weight, batch number or production date, trademark and this standard number. And paste the "Flammable Solids" sign according to Figure 6 of GB190, and the "Handle with Care" and "No Rolling" icons according to Figures 1 and 8 of GB191.
6.2 The outer packaging of industrial red phosphorus is an iron drum with a skin thickness of 0.7~1.0mm. The inside and outside of the drum are painted, and the packaging capacity is 50kg. The inner packaging is 10 plastic bags, each bag is 5kg, and the bag mouth is tied tightly. With the user's consent, it can also be packed in plastic bags. There is no red phosphorus powder allowed outside the bag or inside the barrel, and the lid must be tightly sealed.
6.3 Industrial red phosphorus is a dangerous and flammable item. It must be transported in a covered vehicle. During transportation, it must be handled with care to prevent impact and exposure. Rolling shipping and dropping are strictly prohibited.
6.4 Industrial red phosphorus is stored in a ventilated, dry, and away from heat source warehouse, and must not be mixed with oxidants. 6.5 Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.3 Expression of analysis results
Moisture content (Xs) expressed as mass percentage is calculated according to formula (3): Mass of sample, g.
The result is expressed to 2 decimal places.
4.4.4 Allowable difference
m
m
m
The difference between two parallel measurement results is not greater than 0.03%, and the arithmetic mean is The measurement results. 4.5 Determination of fineness
4.5.1 Instruments and equipment
4.5.1.1 Test sieve (GB6003): R40/3 series $200×50mm/250μm and Φ200×50/1.7mm. 4.5.2 Analysis steps
(3)
Weigh 50g sample, accurate to 0.1g, place it in a 500mL beaker, add 300mL tap water, stir with a glass rod to help disperse, and put the sample Move it into the test sieve and rinse with slow-flowing tap water until there are no red phosphorus particles in the washing water. When measuring with a 1.7mm test sieve, no red phosphorus particles are allowed to remain on the sieve. Place the 250um test sieve and the sieve residue in an electric drying oven at 80-90°C for 2 hours, cool to room temperature in the desiccator, and weigh the sieve residue to the nearest 0.1g. 4.5.3 Expression of analysis results
Fineness expressed as mass percentage (passing 250 μm test sieve) (X,) is calculated according to formula (4): m-ml×100wwW.bzxz.Net
X||tt ||(4)
In the formula: m-mass of sample, g;
ml——mass of sieve residue, g.
The results are expressed to single digits.
4.5.4 Allowable difference
GB4947-90
The difference between two parallel measurement results shall not be greater than 1%, and the arithmetic mean shall be taken as the result. 5 Inspection Rules
5.1 Industrial red phosphorus shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that all industrial red phosphorus shipped out of the factory meets the requirements of this standard. Each batch of products leaving the factory should be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that product quality complies with this standard, and this standard number. 5.2 The user unit has the right to inspect and accept the industrial red phosphorus received in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 10t. 5.4 Determine the number of sampling buckets according to Article 6.6 of GB6678. When sampling, take one bag from each sampling barrel, insert the sampler vertically from the center of the bag to 3/4 of the depth of the material layer, and take a sample. The total sampling volume shall not be less than 1kg. Mix the sample evenly, divide it into about 500g using the quartering method, and put it into two clean, dry bottles with ground stoppers. The bottle mouths should be sealed, and labels should be attached to the bottles to indicate: manufacturer name, product name. , grade, batch number, sampling date and sampler’s name. One bottle is used for testing and the other bottle is kept for future reference.
5.5 If one indicator of the inspection result does not meet the requirements of this standard, samples from twice the amount of packaging units should be re-sampled for inspection. If the inspection result is that even one indicator does not meet the requirements of this standard, the entire batch of products Cannot be accepted. 5.6 When the supply and demand parties have objections to product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration and Inspection". 6 Marking, packaging, transportation and storage
6.1 The packaging barrel should be firmly and clearly marked, indicating: manufacturer name, product name, grade, net weight, batch number or production date, trademark and this standard number. And paste the "Flammable Solids" sign according to Figure 6 of GB190, and the "Handle with Care" and "No Rolling" icons according to Figures 1 and 8 of GB191.
6.2 The outer packaging of industrial red phosphorus is an iron drum with a skin thickness of 0.7~1.0mm. The inside and outside of the drum are painted, and the packaging capacity is 50kg. The inner packaging is 10 plastic bags, each bag is 5kg, and the bag mouth is tied tightly. With the consent of the user, it can also be packed in plastic bags. There is no red phosphorus powder allowed outside the bag or inside the barrel, and the lid must be tightly sealed.
6.3 Industrial red phosphorus is a dangerous and flammable item. It must be transported in a covered vehicle. During transportation, it must be handled with care to prevent impact and exposure. Rolling shipping and dropping are strictly prohibited.
6.4 Industrial red phosphorus is stored in a ventilated, dry, and away from heat source warehouse, and must not be mixed with oxidants. 6.5 Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.5. Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.5. Under the specified storage conditions, the quality guarantee period of industrial red phosphorus is 5 months. Additional notes:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. It is under the jurisdiction of Tianjin Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard is drafted by Sichuan West Sichuan Chemical Plant and Tianjin Chemical Industry Research Institute. The main drafters of this standard are Zhang Jingjuan, Yang Wenhan, and Liu Xiaoping. This standard was first published on February 9, 1985. This standard refers to the US military standard MIL-P-211C industrial red phosphorus.
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