Some standard content:
Record number: 2772-1999
HG/T3586—1999
This standard adopts the Japanese Industrial Standard JISK1407:1978 (1988) "Ammonium Bifluoride" in a non-equivalent manner. The main technical differences between this standard and the Japanese Industrial Standard are as follows: the Japanese Industrial Standard has only one grade; this standard divides the product into two grades according to the actual situation in my country. The indicators of superior products are better than those of the Japanese Industrial Standard, and the indicators of first-class products are set according to my country's national conditions. This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the inorganic salt product standardization technical unit of the Ministry of Chemical Industry. The drafting units of this standard are: Tianjin Chemical Research Institute of the Ministry of Chemical Industry, Shandong Zibo Dongyue Fluorine Chemical Co., Ltd., Jiangsu Sheyang Fluorine Chemical General Plant, and Sinochem Hebei Group Xiongxian Chemical General Plant. The main drafters of this standard are: Yao Jinjuan, Guo Fengxin, Zhang Wucheng, Yu Guanghui, and Wang Xingtian. This standard is entrusted to the inorganic salt product standardization technical unit of the Ministry of Chemical Industry for interpretation. 1079
Chemical Industry Standard of the People's Republic of China
Industrial Ammonium Bifluoride
Ammonium bifloride for industrial useHG/T 3586--1999
This standard specifies the requirements, test methods, inspection rules, and marking, packaging, transportation, storage and safety requirements for industrial ammonium bifluoride. This standard applies to industrial ammonium bifluoride prepared by the neutralization reaction of industrial anhydrous hydrogen fluoride and liquid ammonia under liquid phase conditions. This product is mainly used as a plugging remover for oil production, a fine ceramic filler, and an etchant for glass crafts. Molecular formula: NH, HF2
Relative molecular mass: 57.04 (according to the 1995 international relative atomic mass) 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB 190—1990
GB 191—1990
Dangerous Goods Packaging Marking
Picture Marking for Packaging Storage and Transportation
GB/T 601—1988
GB/T 602—1988
GH/T 603-1988
GB/T 1250—1989
GB/T 6678—1986
GB/T 6682-1992
GB/T 8946-1988
Chemical reagents
Preparation of standard solutions for titration analysis (volume analysis) Chemical reagents
1 Preparation of standard solutions for impurity determination (neqISO6353-1:1982) Preparation of preparations and products used in chemical reagent test methods (neqISO6353-1:1982) Expression and determination methods of limit values General rules for sampling of chemical products
Specifications and test methods for water used in analytical laboratories (eqvIS) 3696:1987) Plastic woven bags
Appearance: colorless rhombus or flaky crystals. www.bzxz.net
3.2 Industrial ammonium bifluoride should meet the requirements of Table 1. Table 1 Requirements
Ammonium bifluoride (NH,HF2) content (on dry basis) Drying loss
Ignition residue content
Sulfate (on SO) content
Ammonium fluorosilicate [(NH)SiF] content
Approved by the State Administration of Petroleum and Chemical Industry on April 20, 1999 1080
Superior product
Implemented on April 1, 2000
Test method
HG/T 3586--1999
The reagents and water used in this standard, unless otherwise specified, refer to analytically pure reagents and (grade 3 water specified in GB/T6682. The standard titration solutions, impurity standard solutions, preparations and products used in the test, unless otherwise specified, are prepared in accordance with the provisions of GB/T601, G13/T602 and GB/T603.
Safety Tips: Ammonium bifluoride is easily deliquescent in the air and its aqueous solution is strongly acidic. Avoid direct contact with skin during operation. If contact with skin occurs, rinse immediately with plenty of water. 4.1 Determination of ammonium bifluoride content
4.1.1 Method summary
At nearly 0°C, add saturated potassium nitrate solution to eliminate the interference of ammonium fluosilicate in the sample, use bromothymol blue-neutral red as indicator, and titrate with sodium hydroxide standard titration solution. 4.1.2 Reagents and materials
4.1.2.1 Crushed ice: Use distilled water or ionized water; 4.1.2.2 Saturated potassium nitrate solution;
4.1.2.3 Standard sodium hydroxide titration solution: c(NaOH) is about 0.5mol/I.; 4.1.2.4 Bromothymol blue-neutral red mixed indicator solution: weigh 0.1g bromothymol blue and 0.1g neutral red and dissolve them in 200ml.95% ethanol. 4.1.3 Analysis steps
Weigh about 0.8g of the sample (precision) that has been dried to constant weight in a silica gel dryer Accurate to 0.0002g), transfer the sample with a small amount of cold water to a polyethylene beaker pre-filled with 20ml of saturated potassium nitrate solution and 50g of crushed ice, add 5 drops of bromothymol blue-neutral red mixed indicator solution, and titrate with sodium hydroxide standard titration solution until dark green (the solution after this determination is retained for the determination of ammonium fluorosilicate content). 4.1.4 Expression of analytical results
The ammonium bifluoride (NH,HF,) content X expressed as mass fraction is calculated according to formula (1): cV×0. 057 04 ×100 =cV×5. 704x
Wherein: c——actual concentration of sodium hydroxide standard titration solution, mol/L.; V——volume of sodium hydroxide standard titration solution consumed in titration, ml; m-mass of sample, g;
0.05704--*mass of ammonium bifluoride expressed in grams equivalent to 1.00ml. sodium hydroxide standard titration solution [c (NaOH) = 1.000mol/L].
4.1.5 Allowable difference
The arithmetic mean of the results of two parallel determinations is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.2%. 4.2 Determination of loss on drying
4.2.1 Summary of method
Dry the sample on silica gel in a desiccator to constant weight, and calculate the loss on drying from the mass of the remaining sample. 4.2.2 Instruments and equipment
4.2.2.1 Platinum (or silver) crucible;
4.2.2.2 Silica gel desiccator.
4.2.3 Analysis steps
Weigh 1g of sample (accurate to 0.001g), place it in a platinum (or silver) crucible with a lid that has been dried to constant weight in a silica gel desiccator, place it in a silica gel desiccator, open the lid to dry, and weigh it for the first time after leaving it for 4 hours, and weigh it every 2 hours thereafter until the difference between the two weighings is no more than 0.0002g.
4.2.4 Expression of analysis results
HG/T 3586--1999
The drying loss X expressed as mass fraction is calculated according to formula (2): X = ml=-m2 × 100
Wherein: mi---mass of the sample and crucible before drying, g; m2---mass of the sample and crucible after drying, g; m
--mass of the sample·g.
4.2.5 Allowable difference
The arithmetic mean of the results of two parallel determinations is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.1%. 4.3 Determination of ignition residue content
4.3.1 Summary of method
The sample is burned in a high-temperature furnace to constant weight, and the ignition residue content is calculated from the mass of the remaining residue. 4.3.2 Instruments and equipment
4.3.2.1 Platinum blood;
4.3.2.2 High temperature furnace: the temperature can be controlled at (700±25)℃. 4.3.3 Analysis steps
· (2)
Weigh 5g of sample (accurate to 0.001g), place it in a platinum dish that has been burned to constant weight at (700±25)℃, heat it at low temperature in a fume hood until the volatiles are completely evaporated, and place the platinum dish in a high temperature furnace at (700±25)℃ and burn it to constant weight. 4.3.4 Expression of analysis results
The ignition residue content X expressed as mass fraction is calculated according to formula (3): Xs - m=m2 ×100
Wherein: mi-
The mass of the ignition residue and platinum blood, g;
The mass of the empty platinum blood, g;
The mass of the sample, g.
4.3.5 Allowable difference
The arithmetic mean of the results of two parallel determinations is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.05%. 4.4 Determination of sulfate content
· (3)
Safety tips: During this operation, corrosive gas will escape. It must be carried out in a fume hood and carefully operated to avoid splashing on the skin. 4.4.1 Method summary
Add hydrochloric acid and a small amount of sodium carbonate solution to the sample and repeatedly evaporate it on a water bath. Dissolve the residue and add barium chloride solution to precipitate sulfate as barium sulfate, and compare turbidity with the standard. 4.4.2 Reagents and materials
4.4.2.1 95% ethanol;
4.4.2.2 Hydrochloric acid solution: 2+1;
4.4.2.3 Sodium carbonate solution: 100g/L;
4.4.2.4 Sodium chloride solution: 100g/L
4.4.2.5 Sulfate standard solution: 1mL solution contains 0.1mgSO4.4.4.3 Analysis steps
Weigh about (0.50±0.01)g of sample, place it in platinum blood, add 0.5mL sodium carbonate solution and 10mL hydrochloric acid solution, evaporate to dryness on a water bath. Repeat the above operation three times, dissolve the residue with 1mL hydrochloric acid solution and about 20mL water, transfer the solution to a 100mL volumetric flask, dilute to the scale with water, and shake well. Use a pipette to transfer 20ml of the above solution (filter if necessary), place it in a 50ml colorimetric tube, add water to 25ml, add 3ml 95% ethanol and 2ml barium chloride solution, and compare the turbidity after leaving it for 1 hour. Its turbidity shall not be deeper than the standard. 1082
HG/T 3586—1999
Preparation of standard turbidity solution: Add 0.1ml sodium carbonate solution and 6ml hydrochloric acid solution to porcelain evaporator III, and evaporate to dryness on a water bath. Dissolve the residue with 0.2mL hydrochloric acid solution and a small amount of water, transfer the solution to a 50mL colorimetric tube, add 1.00mL sulfate standard solution, and then proceed from "add water to 25mL, ·.\" and treat the sample in the same way. 4.5 Determination of ammonium fluorosilicate content
Safety tips: The sodium hydroxide used in this test method is a strong base, so safety should be paid attention to when using it. 4.5.1 Method summary
Filter the solution after the determination of ammonium bifluoride content while cooling. Dissolve the potassium fluorosilicate precipitate at 80℃, and titrate with sodium hydroxide standard titration solution using phenolphthalein as an indicator. 4.5.2 Reagents and materials
4.5.2.1 Potassium chloride-ethanol solution
Weigh about 2g potassium chloride and dissolve it in 100mL 50% ethanol; 4.5.2.2 Sodium hydroxide standard titration solution: c(Na( )H) is about 0.1mol/I.; 4.5.2.3 Phenolic acid indicator solution: 10g/1.
4.5.3 Instruments and equipment
4.5.3.1 Polyethylene funnel;
4.5.3.2 Ethylene beaker.
4.5.4 Analysis steps
Filter the solution after determination in 4.1 with a polyethylene funnel, and filter while cooling (the temperature should be kept at about 0℃ at this time). Wash the precipitate thoroughly with pre-cooled potassium chloride ethanol solution, and transfer the precipitate together with the filter paper into the original beaker. Add about 100mL of warm water and 5 drops of phenolic acid indicator solution, and heat to 80℃ on a water bath to dissolve. Use sodium hydroxide standard titration solution to titrate the chamber solution to a light red color. 4.5.5 Expression of analysis results
The ammonium fluorosilicate content X expressed as mass fraction is calculated according to formula (4): X± = VeX0.04454 ×100 = YVc X 4.454
Wherein: V—volume of sodium hydroxide standard titration solution consumed in titration, mL; c—actual concentration of sodium hydroxide standard titration solution, mol/L; m—mass of the sample in 4.1, g;
(4)
0.04454-1.00 mL sodium hydroxide standard titration solution c(NaOH)=1.000 mol/L is equivalent to the mass of ammonium fluorosilicate expressed in grams.
4.5.6 Allowable difference
The arithmetic mean of the results of two parallel determinations is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.05%. 5 Inspection rules
5.1 All items specified in this standard are subject to factory inspection. 5.2 Each batch of products shall not exceed 20t.
5.3 Determine the number of sampling units in accordance with 6.6 of GB/T6678-1986. When sampling, insert the hard plastic tube sampler obliquely from the top of the packaging bag to 3/4 of the depth of the material layer for sampling. After mixing the collected samples, reduce them to no less than 500g by quartering method, and pack them into two clean and dry plastic bottles and seal them. Label the bottles with the manufacturer's name, product name, grade, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for 1 month for reference. 5.4 Industrial ammonium bifluoride shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that each batch of products shipped out of the factory meets the requirements of this standard. If one of the indicators in the test results does not meet the requirements of this standard, re-sampling shall be carried out from twice the amount of packaging for re-testing. Even if only one indicator does not meet the requirements of this standard in the re-testing results, the entire batch of products shall be unqualified. 5.5 Determine whether the test results meet the standard by the rounded value comparison method specified in 5.2 of GB/T1250-1989. 1083
6 Marking, packaging, transportation, storage
HG/T 3586-1999
6.1 The packaging of industrial ammonium bifluoride shall be firmly and clearly marked, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, this standard number and the "toxic" mark specified in GB190, the "heat-averse" mark and the "humidity-averse" mark specified in GB191.
6.2 Each batch of industrial ammonium bifluoride shipped out of the factory should be accompanied by a quality certificate. The content includes the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, proof that the product quality complies with this standard and the number of this standard. 6.3 Industrial ammonium bifluoride is double-packed. The inner packaging uses two layers of polyethylene plastic film bags with a thickness of not less than 0.05mm; the outer packaging uses plastic woven bags, and its performance and inspection methods should comply with the provisions of Type A in GB/T8946. The net content of each bag is 10kg or 25kg. 6.4 For the packaging of industrial ammonium bifluoride, the two-layer inner bags are tied four times with vinyl ropes or other ropes of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the bag edge, and the mouth is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge. The stitches are neat and the stitches are evenly hooked. There are no leaking seams or skipped stitches. 6.5 Industrial ammonium bifluoride should be covered during transportation, the temperature should not exceed 50℃, and it should be protected from rain and moisture; it should not be transported together with alkaline substances.
6.6 Industrial ammonium bifluoride should be stored in a cool and dry place, the temperature should not exceed 50℃, and it should be protected from rain and moisture; it should not be stored together with alkaline substances. Safety requirements
When transporting industrial ammonium bifluoride, it should be prevented from leaking and direct contact with the skin. If it contacts the skin, it should be rinsed immediately with plenty of water. 1084\Start, and treat it in the same way as the sample. 4.5 Determination of ammonium fluorosilicate content
Safety tips: The sodium hydroxide used in this test method is a strong base, so pay attention to safety when using it. 4.5.1 Method summary
The solution after the determination of the ammonium bifluoride content is cooled and filtered. At 80℃, the potassium fluorosilicate precipitate is dissolved, and phenolphthalein is used as an indicator and titrated with sodium hydroxide standard titration solution. 4.5.2 Reagents and materials
4.5.2.1 Potassium chloride-ethanol solution
Weigh about 2g of potassium chloride and dissolve it in 100mL of 50% ethanol; 4.5.2.2 Standard sodium hydroxide titration solution: c(Na()H) is about 0.1mol/I.; 4.5.2.3 Phenolic acid indicator solution: 10g/1.
4.5.3 Instruments and equipment
4.5.3.1 Polyethylene funnel;
4.5.3.2 Ethylene beaker.
4.5.4 Analysis steps
Filter the solution after determination in 4.1 through a polyethylene funnel, and filter while cooling (the temperature should be kept at about 0°C at this time). Wash the precipitate thoroughly with pre-cooled potassium chloride ethanol solution, and transfer the precipitate together with the filter paper into the original beaker. Add about 100mL of warm water and 5 drops of phenolic indicator solution, and heat to 80°C in a water bath to dissolve. Titrate the solution with sodium hydroxide standard titration solution until it turns light red. 4.5.5 Expression of analysis results
The content of ammonium fluorosilicate expressed as mass fraction X is calculated according to formula (4): X± = VeX0. 044 54 × 100 = YVc X 4. 454
Wherein: V—the volume of sodium hydroxide standard titration solution consumed in titration, mL; c—the actual concentration of sodium hydroxide standard titration solution, mol/L; m—the mass of the sample in 4.1, g;
(4)
0.04454—the mass of ammonium fluorosilicate expressed in grams equivalent to 1.00 mL sodium hydroxide standard titration solution c(NaOH) = 1.000 mol/L.
4.5.6 Allowable difference
The arithmetic mean of the results of two parallel determinations is taken as the determination result. The absolute difference of the results of parallel determinations shall not exceed 0.05%. 5 Inspection rules
5.1 All items specified in this standard are subject to factory inspection. 5.2 Each batch of products shall not exceed 20t.
5.3 Determine the number of sampling units in accordance with 6.6 of GB/T6678-1986. When sampling, insert the hard plastic tube sampler obliquely from the top of the packaging bag to 3/4 of the depth of the material layer for sampling. After mixing the collected samples, reduce them to no less than 500g by the quartering method, and pack them in two clean and dry plastic bottles and seal them. Paste labels on the bottles, indicating the manufacturer's name, product name, grade, batch number, sampling date and the name of the sampler. One bottle is used as a laboratory sample, and the other is kept for 1 month for reference. 5.4 Industrial ammonium bifluoride should 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 each batch of products leaving the factory meets the requirements of this standard. If one of the indicators in the test results does not meet the requirements of this standard, re-samples should be taken from twice the amount of packaging for re-testing. Even if only one indicator in the re-test results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 5.5 Determine whether the test results meet the standard according to the rounded value comparison method specified in 5.2 of GB/T1250-1989. 1083
6 Marking, packaging, transportation, storage
HG/T 3586-1999
6.1 The packaging of industrial ammonium bifluoride should be firmly and clearly marked, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, this standard number and the "toxic" mark specified in GB190, the "heat-sensitive" mark and the "moisture-sensitive" mark specified in GB191.
6.2 Each batch of industrial ammonium bifluoride leaving the factory should be accompanied by a quality certificate. The content includes the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, proof that the product quality complies with this standard and the number of this standard. 6.3 Industrial ammonium bifluoride is double-packed. The inner packaging is a two-layer polyethylene plastic film bag with a thickness of not less than 0.05mm; the outer packaging is a plastic woven bag, and its performance and inspection method should comply with the provisions of Type A in GB/T8946. The net content of each bag is 10kg or 25kg. 6.4 For the packaging of industrial ammonium bifluoride, the two-layer inner bag is tied four times with vinyl rope or other ropes of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the edge of the bag, and the edge is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the edge of the bag. The stitches are neat and the stitches are evenly hooked. There is no leakage or skipping. 6.5 Industrial ammonium bifluoride should be covered during transportation, and the temperature should not be higher than 50℃ to prevent rain and moisture; it should not be mixed with alkaline substances.
6.6 Industrial ammonium bifluoride should be stored in a cool and dry place, the temperature should not exceed 50℃, and should be protected from rain and moisture; it should not be stored together with alkaline substances. Safety requirements
When transporting industrial ammonium bifluoride, it should be prevented from leaking and direct contact with the skin. If it contacts the skin, it should be rinsed immediately with plenty of water. 1084\Start, and treat it in the same way as the sample. 4.5 Determination of ammonium fluorosilicate content
Safety tips: The sodium hydroxide used in this test method is a strong base, so pay attention to safety when using it. 4.5.1 Method summary
The solution after the determination of the ammonium bifluoride content is cooled and filtered. At 80℃, the potassium fluorosilicate precipitate is dissolved, and phenolphthalein is used as an indicator and titrated with sodium hydroxide standard titration solution. 4.5.2 Reagents and materials
4.5.2.1 Potassium chloride-ethanol solution
Weigh about 2g of potassium chloride and dissolve it in 100mL of 50% ethanol; 4.5.2.2 Standard sodium hydroxide titration solution: c(Na()H) is about 0.1mol/I.; 4.5.2.3 Phenolic acid indicator solution: 10g/1.
4.5.3 Instruments and equipment
4.5.3.1 Polyethylene funnel;
4.5.3.2 Ethylene beaker.
4.5.4 Analysis steps
Filter the solution after determination in 4.1 through a polyethylene funnel, and filter while cooling (the temperature should be kept at about 0°C at this time). Wash the precipitate thoroughly with pre-cooled potassium chloride ethanol solution, and transfer the precipitate together with the filter paper into the original beaker. Add about 100mL of warm water and 5 drops of phenolic indicator solution, and heat to 80°C in a water bath to dissolve. Titrate the solution with sodium hydroxide standard titration solution until it turns light red. 4.5.5 Expression of analysis results
The content of ammonium fluorosilicate expressed as mass fraction X is calculated according to formula (4): X± = VeX0. 044 54 × 100 = YVc X 4. 454
Wherein: V—the volume of sodium hydroxide standard titration solution consumed in titration, mL; c—the actual concentration of sodium hydroxide standard titration solution, mol/L; m—the mass of the sample in 4.1, g;
(4)
0.04454—the mass of ammonium fluorosilicate expressed in grams equivalent to 1.00 mL sodium hydroxide standard titration solution c(NaOH) = 1.000 mol/L.
4.5.6 Allowable difference
The arithmetic mean of the results of two parallel determinations is taken as the determination result. The absolute difference of the results of parallel determinations shall not exceed 0.05%. 5 Inspection rules
5.1 All items specified in this standard are subject to factory inspection. 5.2 Each batch of products shall not exceed 20t.
5.3 Determine the number of sampling units in accordance with 6.6 of GB/T6678-1986. When sampling, insert the hard plastic tube sampler obliquely from the top of the packaging bag to 3/4 of the depth of the material layer for sampling. After mixing the collected samples, reduce them to no less than 500g by the quartering method, and pack them in two clean and dry plastic bottles and seal them. Paste labels on the bottles, indicating the manufacturer's name, product name, grade, batch number, sampling date and the name of the sampler. One bottle is used as a laboratory sample, and the other is kept for 1 month for reference. 5.4 Industrial ammonium bifluoride should 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 each batch of products leaving the factory meets the requirements of this standard. If one of the indicators in the test results does not meet the requirements of this standard, re-samples should be taken from twice the amount of packaging for re-testing. Even if only one indicator in the re-test results does not meet the requirements of this standard, the entire batch of products shall be unqualified. 5.5 Determine whether the test results meet the standard according to the rounded value comparison method specified in 5.2 of GB/T1250-1989. 1083
6 Marking, packaging, transportation, storage
HG/T 3586-1999
6.1 The packaging of industrial ammonium bifluoride should be firmly and clearly marked, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, this standard number and the "toxic" mark specified in GB190, the "heat-sensitive" mark and the "moisture-sensitive" mark specified in GB191.
6.2 Each batch of industrial ammonium bifluoride leaving the factory should be accompanied by a quality certificate. The content includes the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, proof that the product quality complies with this standard and the number of this standard. 6.3 Industrial ammonium bifluoride is double-packed. The inner packaging is a two-layer polyethylene plastic film bag with a thickness of not less than 0.05mm; the outer packaging is a plastic woven bag, and its performance and inspection method should comply with the provisions of Type A in GB/T8946. The net content of each bag is 10kg or 25kg. 6.4 For the packaging of industrial ammonium bifluoride, the two-layer inner bag is tied four times with vinyl rope or other ropes of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the edge of the bag, and the edge is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the edge of the bag. The stitches are neat and the stitches are evenly hooked. There is no leakage or skipping. 6.5 Industrial ammonium bifluoride should be covered during transportation, and the temperature should not be higher than 50℃ to prevent rain and moisture; it should not be mixed with alkaline substances.
6.6 Industrial ammonium bifluoride should be stored in a cool and dry place, the temperature should not exceed 50℃, and should be protected from rain and moisture; it should not be stored together with alkaline substances. Safety requirements
When transporting industrial ammonium bifluoride, it should be prevented from leaking and direct contact with the skin. If it contacts the skin, it should be rinsed immediately with plenty of water. 10841 The packaging of industrial ammonium bifluoride should be firmly and clearly marked, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, the number of this standard, and the "toxic" mark specified in GB190, the "heat-afraid" mark and the "wet-afraid" mark specified in GB191.
6.2 Each batch of industrial ammonium bifluoride shipped out of the factory should be accompanied by a quality certificate. The content includes the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, the certificate that the product quality meets this standard and the number of this standard. 6.3 Industrial ammonium bifluoride is double-layered. The inner packaging is a two-layer polyethylene plastic film bag with a thickness of not less than 0.05mm; the outer packaging is a plastic woven bag, and its performance and inspection methods should comply with the provisions of Type A in GB/T8946. The net content of each bag is 10kg or 25kg. 6.4 For the packaging of industrial ammonium bifluoride, the two inner bags are tied four times with vinyl rope or other ropes of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the bag edge, and the mouth is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge. The stitches are neat and the stitch lengths are even. There are no leaks or skipped stitches. 6.5 During transportation, industrial ammonium bifluoride should be covered, the temperature should not exceed 50℃, and it should be protected from rain and moisture; it should not be mixed with alkaline substances.
6.6 Industrial ammonium bifluoride should be stored in a cool and dry place, the temperature should not exceed 50℃, and it should be protected from rain and moisture; it should not be mixed with alkaline substances. Safety requirements
When transporting industrial ammonium bifluoride, it should be prevented from leakage and direct contact with the skin. If it comes into contact with the skin, it should be rinsed immediately with plenty of water. 10841 The packaging of industrial ammonium bifluoride should be firmly and clearly marked, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, the number of this standard, and the "toxic" mark specified in GB190, the "heat-afraid" mark and the "wet-afraid" mark specified in GB191.
6.2 Each batch of industrial ammonium bifluoride shipped out of the factory should be accompanied by a quality certificate. The content includes the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date, the certificate that the product quality meets this standard and the number of this standard. 6.3 Industrial ammonium bifluoride is double-layered. The inner packaging is a two-layer polyethylene plastic film bag with a thickness of not less than 0.05mm; the outer packaging is a plastic woven bag, and its performance and inspection methods should comply with the provisions of Type A in GB/T8946. The net content of each bag is 10kg or 25kg. 6.4 For the packaging of industrial ammonium bifluoride, the two inner bags are tied four times with vinyl rope or other ropes of equivalent quality, or sealed with other equivalent methods; the outer bag is folded at a distance of not less than 30mm from the bag edge, and the mouth is sewn with vinyl thread or other thread of equivalent quality at a distance of not less than 15mm from the bag edge. The stitches are neat and the stitch lengths are even. There are no leaks or skipped stitches. 6.5 During transportation, industrial ammonium bifluoride should be covered, the temperature should not exceed 50℃, and it should be protected from rain and moisture; it should not be mixed with alkaline substances.
6.6 Industrial ammonium bifluoride should be stored in a cool and dry place, the temperature should not exceed 50℃, and it should be protected from rain and moisture; it should not be mixed with alkaline substances. Safety requirements
When transporting industrial ammonium bifluoride, it should be prevented from leakage and direct contact with the skin. If it comes into contact with the skin, it should be rinsed immediately with plenty of water. 1084
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