Some standard content:
Record number: 2761-1999
HG 3581-1999
This standard is not equivalent to the US military standard MIL-S-20552B:1983 "Industrial Sodium Azide", and the indicators of superior products are equivalent to the US military standards. The main technical differences with the US military standards are as follows: 1 The US military standard is divided into two levels, A and B; this standard is divided into three levels according to my country's classification requirements: superior products, first-class products, and qualified products.
2 According to my country's current production process and actual product conditions, this standard divides the alkalinity in the US military standard into two indicators, sodium carbonate and sodium hydroxide, and calculates them separately. In addition, heavy metal indicators are added according to user requirements. 3 The indicator parameters of first-class products and qualified products in this standard are set according to the actual situation of my country's products and user requirements. 4 In terms of analytical methods, the US military standard adopts the weight method for the determination of sulfate content; this standard adopts the turbidimetric method. The determination of iron content is carried out by the US military standard using the ammonium thiocyanate colorimetric method; this standard adopts GB/T3049-1986 "General Method for Determination of Iron Content in Chemical Products - O-Phenanthroline Spectrophotometry". The determination of heavy metal content adopts GB/T8451-1987 "Limit Test Method for Heavy Metals in Food Additives".
Appendix A of this standard is a prompt appendix.
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 unit of this standard: Tianjin Chemical Research Institute of the Ministry of Chemical Industry, Hunan Xianghong Machinery Factory. The main drafters of this standard: Shi Jie and Liu Fengguo. This standard is entrusted to the inorganic salt product standardization technical unit of the Ministry of Chemical Industry for interpretation. 69
Chemical Industry Standard of the People's Republic of China
Industrial Sodium Azide
Sodium azide for industrial useHG 3581—1999
This standard specifies the requirements, test methods, marking, packaging, transportation, storage and safety of industrial sodium azide. This standard applies to industrial sodium azide, which is mainly used as a gas generator for automobile airbags, detonators, photographic agents, synthetic resin foaming agents, and pesticides.
Molecular formula: NaN3
Relative molecular mass: 65.01 (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 version of the following standards. GB190--1990 Dangerous Goods Packaging Marking
GB191--1990 Pictorial Marking for Packaging Storage and Transportation
GB/T601-1988 Preparation of Standard Solutions for Titration Analysis (Volumetric Analysis) of Chemical Reagents Preparation of Standard Solutions for Determination of Impurities in Chemical Reagents (neqISO6353-1:1982)GB/T 602--1988
GB/T603--1988 Preparation of Preparations and Products Used in Test Methods for Chemical Reagents (neqISO6353-11982)GB1250-1989
General Method for Determination of Iron Content in Chemical Products-O-Phenyline Spectrophotometric Method (neqISO6685: GB/T3049-
—1986
General Rules for Sampling of Chemical Products
GB/T 6678—19861
GB/T6679-1986 General rules for sampling of solid chemical products GB/T6682-1992 Specifications and test methods for water used in analytical laboratories (eqvIS3696:1987) Test methods for limits of heavy metals in food additives GB/T 8451- -1987
3 Requirements
3.1 Appearance: This product is white or light yellow powder. 3.2 Technical indicators should meet the requirements of Table 1Www.bzxZ.net
Approved by the State Administration of Petroleum and Chemical Industry on April 20, 199970
Implemented on April 1, 2000
Main content (as NaNa)
Sodium hydroxide (NaH) content
Sodium carbonate (NazCO) content
Water-insoluble matter content
Chloride content
Indicator items
Sulfate (as Na?SO4) content
Nitrate content
Iron (Fe) content
Heavy metal (as Ph) content
Test method
HG 3581—1999
Requirements in Table 1
Superior quality
First-class quality
Qualified quality
The reagents and water used in this standard, unless otherwise specified, refer to analytical 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, GB/T602 and GB/T603.
Safety Tips: The determination of all index items in this standard must be carried out in a fume hood. The remaining sodium azide or its solution in the test must be destroyed according to the method in Appendix A (Appendix of Tips). Be careful when encountering strong acids and strong bases in the test. 4.1 Determination of sodium azide content
4.1.1 Method summary
Sodium azide reacts with ammonium cerium hexanitrate to reduce tetravalent cerium to trivalent cerium; titrate the excess cerium hexanitrate solution with standard titration solution of ammonium ferrous sulfate, and calculate the content of sodium azide based on the consumption of ammonium ferrous sulfate solution. 4.1.2 Reagents and materials
4.1.2.1 Standard titration solution of ammonium cerium hexanitrate: cL(NH4), Ce(NO4). ］ is about 0.1mol/L. Preparation: Dissolve 170g of ammonium cerium hexanitrate in a solution containing 185mL of concentrated nitric acid and 125ml of water, and stir well. Add 300mL of water containing 12.5mL of concentrated nitric acid and stir. Dilute this solution to 2.501 while stirring continuously. This solution should be stored in a brown bottle. 4.1.2.2 O-phenanthroline indicator solution
Preparation: Dissolve 0.5g of ferrous sulfate in 50ml of water, add 2 drops of concentrated sulfuric acid. Weigh 0.5g of o-phenanthroline into this solution, add water to make 100ml solution.
4.1.2.3 Standard titration solution of ammonium ferrous sulfate: cL(NH)2Fe(SO4）2］ is about 0.05mol/L. Preparation: Carefully add 10mL of concentrated sulfuric acid to 700mL of water and cool. Add 20g of ammonium ferrous sulfate [（NH4）,Fe（SO4）26H20], stir until completely dissolved, transfer to a 1L volumetric flask, dilute to the mark with water, and mix. Calibration: Dry about 4g of standard arsenic trioxide at (105±2)℃ for 1h and place in a desiccator to cool. Weigh about 2g of dry arsenic trioxide (accurate to 0.0002g) and place it in a 500mL beaker. Add about 10g of sodium hydroxide and 100mL of water, and stir until completely dissolved. Heat if necessary but not above 60°C. Transfer this solution to a 1L volumetric flask, add 300ml of water and 100ml of 50% sulfuric acid. Dilute to scale with water and shake well. Transfer 50mL of this solution to a 400mL beaker and add 3 drops of tetroxide solution (dissolve 0.25g of tetroxide in a sufficient amount of 0.1mol/1. sulfuric acid solution and make up to 100ml of solution). Use a burette to add 25.0ml of ammonium cerium hexanitrate solution and adjust the volume to about 150ml with water. Add 5.0ml of concentrated sulfuric acid and 2 drops of o-phenanthroline indicator solution. Titrate the excess cerate with ammonium ferrous sulfate solution. Perform a blank test with the same amount of reagents except that tetroxide is not added. 71
HG 3581—1999
The actual concentration c(mol/L) of the standard titration solution of ammonium ferrous sulfate is calculated according to formula (1): 50
m×1000
= (V,-V,) ×0. 049 46 = 0. 989 2(V, -V,)wherein: m---the mass of arsenic trioxide weighed, g; V.--the volume of the standard titration solution of ammonium ferrous sulfate consumed in the blank test, ml; V---the volume of the standard titration solution of ammonium ferrous sulfate consumed by the excess bromate, mL; (1)
0.04946.---the mass of arsenic trioxide expressed in grams equivalent to 1.00mL of the standard titration solution of ammonium ferrous sulfate (c[(NH)2Fe(SO4),]=1.000mol/L).
4.1.3 Analysis steps
Weigh about 2.5g of sample (accurate to 0.0002g), place in a 400mL beaker, dissolve in 200mL of water, transfer to a 250mL volumetric flask, and dilute to the mark with water.Shake well.
Use a pipette to transfer 25ml of the test solution into a 400ml beaker, and slowly add 50.0ml of the standard titration solution of ammonium cerium hexanitrate with a burette. The reaction should be cooled in water. After the reaction is completed, adjust the volume of the solution to about 150ml with water, slowly transfer 5ml of concentrated sulfuric acid with a pipette, add 2 drops of o-phenanthroline indicator solution, and titrate with the standard titration solution of ammonium ferrous sulfate until the solution changes from light green to yellow-red. Except for not adding the sample, a blank test is carried out at the same time and under the same conditions as the sample. 4.1.4 Expression of analytical results
The sodium azide content (X,) expressed as mass percentage is calculated according to formula (2): Xi = c(V-V2) X0. 065 01 × 100 = 65. 01(Vi-V2)cm×250
Wu Zhong: c-
actual concentration of standard ammonium ferrous sulfate solution, mol/L; V.-volume of standard ammonium ferrous sulfate solution consumed in blank test, mLV.·volume of standard ammonium ferrous sulfate solution consumed by excess acid salt, mL; m
（2）
m——mass of sample, g;
0.06501--.-mass of sodium azide in grams equivalent to 1.00mL standard ammonium ferrous sulfate solution (c[(NH4)2Fe(SO,)2=1.000mol/L).
4.1.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.3%. 4.2 Determination of sodium hydroxide and sodium carbonate content 4.2.1 Method summary
Use phenol anhydride as the indicator solution and use hydrochloric acid standard titration solution to titrate the sodium azide solution. According to the consumption of hydrochloric acid, determine the total amount of sodium hydroxide and sodium carbonate in the solution. Add excess sodium hydroxide standard titration solution and barium nitride solution to the test solution, and back titrate to measure the sodium carbonate content. Subtract the sodium carbonate content from the total amount to obtain the sodium hydroxide content. 4.2.2 Reagents and materials
4.2.2.1 Chloride solution: 100 g/L;
4.2.2.2 Phenolic acid indicator solution: 10 g/L;
4.2.2.3 Hydrochloric acid standard titration solution; c(HCl) is about 0.1-mol/L; 4.2.2.4 Sodium hydroxide standard titration solution: c(NaOH) is about 0.1 mol/L. 4.2.3 Analysis steps
Superior and first-class products weigh about 10 g of sample, and qualified products weigh 5 g of sample (accurate to 0.01 g), place in a 500 mL conical flask, and dissolve in about 100 ml of carbon dioxide-free water. Add 2 drops of phenolphthalein indicator solution and quickly titrate to the end point with hydrochloric acid standard titration solution. Record the milliliters of acid consumed in the titration Vi. Use a pipette to transfer 10 mL of sodium hydroxide standard titration solution and add about 10 mL of barium chloride solution. Leave it for about 5 minutes, and titrate again with hydrochloric acid standard titration solution to the end point. Note the number of milliliters of hydrochloric acid standard titration solution consumed Vz. 72
4.2.4 Expression of analysis results
HG3581—1999
The sodium hydroxide (NaOH) content (X) expressed as mass percentage is calculated according to formula (3): X? -[Vicl -(10e -Vee)]×0. 040 00 m
_ 4[Vic1 =(10c2 - Vzc1)]
The sodium carbonate (NazC()) content (X) expressed as mass percentage is calculated according to formula (4): (10c2—Vec)×0. 052 99 ×100 = X.
Wherein: ci is the concentration of the standard hydrochloric acid titration solution, mol/L; c2 is the concentration of the standard sodium hydroxide titration solution, mol/L; X100
5.299(10c2 -V2cl)
V.--the volume of the standard hydrochloric acid solution consumed in the first titration, mL; V.--the volume of the standard hydrochloric acid solution consumed in the second titration, mL; m--the mass of the sample, g;
·(3)
0.04000---the mass of sodium hydroxide expressed in grams equivalent to 1.00mL standard hydrochloric acid solution [c(HC1)=1.000mol/1];
0.05299--the mass of sodium carbonate expressed in grams equivalent to 1.00mL standard hydrochloric acid solution [c(HC1)=1.000mol/L].
4.2.5 Allowable difference
The arithmetic mean of the parallel determination results shall be taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.03%. 4.3 Determination of water-insoluble content
4.3.1 Method summary
After the sample is dissolved in water, it is filtered, washed, dried and weighed. 4.3.2 Instruments and equipment
4.3.2.1 Glass sand crucible: filter plate pore size 5μm~15um; 4.3.2.2 Electric oven: control the temperature (105±2)℃. 4.3.3 Analysis steps
Weigh about 50g of sample (accurate to 0.1g), put it in a 400ml beaker, add 200mL of water at room temperature to dissolve, filter with a glass sand crucible that has been weighed at (105±2)℃ in advance, and wash the precipitate with water at room temperature. Place the glass sand in a (105±2)℃ oven and dry it to constant weight.
4.3.4 Expression and calculation of analysis results
The water-insoluble content (X4) expressed as a mass percentage is calculated according to formula (5): X = m2 = mi×100
Wherein: ml-
-mass of glass crucible, g;
-mass of residue and glass crucible, g;
-mass of sample, g.
4.3.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.02%. 4.4 Determination of chloride content
4.4.1 Reagents and materials
4.4.1.1 Nitric acid solution: 1+4;
4.4.1.2 Silver nitrate solution: 25g/L.
4.4.2 Analysis steps
(5)
HG 3581—1999
Weigh 1.00g of sample, place it in a 400mL beaker, and add 24ml of water to dissolve. Place the beaker in a fume hood and slowly add about 15ml of nitric acid solution. When no bubbles are generated, add 2mL of silver nitrate solution. Except that no sample is added, a blank test is carried out at the same time and under the same conditions as the sample. The test solution and the blank test solution are placed in colorimetric tubes respectively to observe their turbidity. If the turbidity of the test solution is not greater than that of the blank test solution, chloride is not present.
4.5 Determination of sulfate content
4.5.1 Summary of the method
In an acidic medium, sulfate and sodium chloride form barium sulfate precipitate, which is compared with the standard turbidimetric solution to determine the sulfate content. 4.5.2 Reagents and materials
4.5.2.1 Hydrochloric acid solution: 1+1;
4.5.2.2 Barium chloride solution: 20g/L;
4.5.2.3 Starch indicator solution: 5g/L;
4.5.2.4 Sulfate standard solution: 1 ml of solution contains 0.1mgS04.4.5.3 Analysis steps
Weigh 0.1g of sample (accurate to 0.001g), place it in a 50ml colorimetric tube, add 25ml of water, neutralize with hydrochloric acid solution until the blue litmus paper turns red, and add 1ml in excess. Then add 5ml of starch indicator solution and 5ml of barium chloride solution, shake well. After 20 minutes, compare the turbidity with the standard turbidity solution, and its turbidity shall not be greater than that of the standard turbidity solution. Preparation of standard turbidity solution: add 20mL water to a 50mL colorimetric tube, pipette in 5mL sulfate standard solution, add 1mL hydrochloric acid solution, 5mL starch indicator solution and 5mL barium chloride solution, shake well. It can be used for turbidity after 20 minutes. 4.6 Determination of nitrate content
Use a pipette to take 20mL concentrated sulfuric acid, place it in a 100mL beaker, add 0.12g diphenylamine, and slowly dilute it with 20mL water. Place the beaker in a fume hood, add a small amount of sample crystals, and observe its color. If no blue is observed, the sample does not contain nitrate. 4.7 Determination of iron content
4.7.1 Method summary
According to Chapter 2 of GB/T3049-1986.
4.7.2 Reagents and materials
Hydrogen peroxide solution: 1 + 9;
Others according to Chapter 3 of GB/T3049-1986. 4.7.3 Instruments and equipment
Spectrophotometer: with an absorption cell with a thickness of 3 cm. 4.7.4 Analysis steps
4.7.4.1 Drawing of working curve
According to Chapter 5 of GB/T3049--1986.3 It is stipulated that a 3 cm absorption cell and the corresponding amount of iron standard solution should be used to draw a working curve. 4.7.4.2 Preparation of test solution
Weigh about 2 g of the sample (accurate to 0.01 g), place it in a 200 mL beaker containing 3.0 g of sodium nitrite, and add 50 mL of water to dissolve it. Filter and wash the filter and residue with water. Put the filtrate in a fume hood and carefully add about 10 mL of concentrated hydrochloric acid. When the reaction is complete, evaporate the test solution to dryness in the fume hood. Dissolve the residue with about 10 ml of concentrated hydrochloric acid and 1 mL of hydrogen peroxide solution, and evaporate it to dryness again in the fume hood. Dissolve the residue with about 200 ml of water, transfer it to a 250 mL volumetric flask, add water to the mark, and shake well. This is solution A. 4.7.4.3 Preparation of blank test solution
Prepare a blank test solution according to the preparation method of the test solution except that no sample is added. 4.7.4.4 Determination
Use a pipette to transfer 15 mL of solution A and blank test solution respectively, and place them in 100 mL volumetric flasks. Then proceed as per 5.3.2 of GB/T3049-1986, starting from adding water to about 60 mL.74
4.7.5 Expression of analysis results
HG 3581—1999
The iron (Fe) content (X:) expressed as mass percentage is calculated according to formula (6): (ml -mo)× 10--
m×250
where.mi -The mass of iron in the test solution found from the working curve, mg; the mass of iron in the blank test solution found from the working curve, mg; ma
m. The mass of the sample, g.
4.7.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.005%. 4.8 Determination of moisture
4.8.1 Summary of method
Bake the sample at (105±2)℃ to constant weight, and determine the moisture content based on the weight loss before and after heating. 4.8.2 Instruments and equipment
Weighing bottle: $50mm×30mm.
4.8.3 Analysis steps
·（6）
Weigh about 10g of sample (accurate to 0.0002g), place it in a weighing bottle that has been weighed to a constant weight, move it into an electric constant temperature drying oven, and heat it at (105±2)℃. Take it out and place it in a desiccator, cool it to room temperature, and weigh it. Repeat this operation until the weight is constant. 4.8.4 Expression of analysis results
The moisture content (X2) expressed as mass percentage is calculated according to formula (7): X2 = m = m2×100
Where: mi
Weighing bottle and The mass of the sample before drying, g; The mass of the weighing bottle and the sample after drying, g; The mass of the sample, g.
4.8.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.05%. 4.9 Determination of heavy metal content
Weigh about 5g of the sample (accurate to 0.01g), place it in a 100mL beaker, add 30mL of water to dissolve, transfer to a 50ml volumetric flask, dilute to the scale with water, and mix well. Dry filter, discard the first 15mL of solution, use a pipette to transfer 10mL of the test solution and place it in a 5 0mL colorimetric tube.
The standard colorimetric solution is to extract 1ml of lead standard solution (1mL solution contains 10μgPb) with a pipette and place it in a 50mL colorimetric tube.
The following operations shall be carried out in accordance with Chapter 6 of GB/T8451--1987. 5 Inspection rules
5.1 This standard adopts type inspection and routine inspection. All ten indicators specified in the requirements are type inspection items, among which the main content, sodium hydroxide, sodium carbonate, chloride, nitrate, iron and moisture are routine inspection items and should be inspected batch by batch. Under normal circumstances, at least one type inspection shall be carried out every three months.
5.2 Each batch of products shall not exceed 1t.
5.3 Determine the number of sampling units in accordance with the provisions of 6.6 of GB/T6678-1986. Each barrel is a packaging unit. When sampling, insert the sampler obliquely from the top of the packaging bag to 3/4 of the material layer for sampling. After mixing the collected samples, cut them into about 500g by quartering method, and immediately put them into two clean wide-mouth bottles with ground stoppers and seal them. Paste labels on the bottles, indicating the manufacturer name, product name, grade, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other is kept for three months for reference. 75
HG 3581-1999
5.4 Industrial sodium azide should be inspected by the quality supervision department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that each batch of products shipped from the factory meets the requirements of this standard. If one of the indicators in the inspection results does not meet the requirements of this standard, samples should be taken from twice the amount of packaging for re-inspection. Even if only one indicator in the re-inspection results does not meet the requirements of this standard, the entire batch of products will 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. 6 Marking, packaging, transportation and storage
6.1 Industrial sodium azide packaging barrels should have firm and clear markings, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date and the number of this standard, as well as the "highly toxic" specified in GB190 and the "heat-averse" and "moisture-averse" marks specified in GB191.
6.2 Each batch of industrial sodium azide 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 meets this standard and the number of this standard. 6.3 Industrial sodium azide is packaged in cardboard barrels. The inner packaging is a polyethylene plastic film bag with a thickness of not less than 0.08mm. The outer packaging is a cardboard barrel with a thickness of not less than 4mm, and its performance and inspection methods should comply with relevant regulations. The net content of each barrel is 50kg or 25kg. If the user has other requirements for packaging, negotiate to resolve. 6.4 When packing industrial sodium azide, the inner plastic bag should be tied with polypropylene strapping rope or rope of equivalent quality, or sealed with other equivalent methods. The outer packaging barrel should be clamped with a clamping ring and the latch should be inserted. 6.5 Industrial sodium azide should be covered during transportation to prevent sun exposure, rain and moisture. Open flames are strictly prohibited to prevent impact and damage. The hazard code is UN1687.
6.6 Industrial sodium azide should be stored in a cool and dry place to prevent rain and moisture. Prevent sun exposure and heat. 7 Safety
7.1 Industrial sodium azide can explode violently when exposed to high heat, severe vibration or contact with heavy metals such as lead, silver, mercury or copper; it can release extremely toxic hydrogen azide gas when in contact with acid.
7.2 Industrial sodium azide is a highly toxic substance. Production personnel should avoid direct contact with sodium azide or its dust during the production process; the workshop for producing sodium azide should be well ventilated.
7.3 If sodium azide is accidentally ingested in one day, a doctor should be consulted in time. If the poisoned person is conscious, let him put his finger into his throat while drinking water and milk to force vomiting. Never let the unconscious poisoned person eat anything. Once the poisoned person is unconscious or has convulsions, he needs to be rushed to the hospital for emergency treatment and do not do anything on his own. Medical First Aid Guide No. 220.7.4 For those who inhale sodium azide, seek medical help in time. Move the poisoned person to a place with fresh air. If breathing is difficult, oxygen should be given; if breathing stops, artificial respiration should be performed. 7.5 If sodium azide splashes into the eyes or on the skin, rinse immediately with plenty of water. 76
HG 3581—1999
Appendix A
(Suggested Appendix)
Treatment of Sodium Azide Waste Samples
After the test, dissolve the remaining sodium azide sample in water, combine it with the remaining test solution, add an appropriate amount of sodium nitrite, and then add an appropriate amount of 150g/L~200g/L nitric acid solution to decompose the azide. The reaction must be carried out in a fume hood. After destruction, use ferric chloride solution to check N ions (ferric chloride reacts with N: ions to produce a bright blood red color, and this reaction is very sensitive).4 Determination
Use a pipette to transfer 15 mL of solution A and blank test solution respectively, and place them in 100 mL volumetric flasks. Then follow the steps in 5.3.2 of GB/T3049-1986, starting from adding water to about 60 mL.74
4.7.5 Expression of analysis results
HG 3581—1999
The iron (Fe) content (X:) expressed as mass percentage is calculated according to formula (6): (ml -mo)× 10--
m×250
Where.mi -The mass of iron in the test solution found from the working curve, mg; the mass of iron in the blank test solution found from the working curve, mg; ma
m. The mass of the sample, g.
4.7.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.005%. 4.8 Determination of moisture
4.8.1 Summary of method
Bake the sample at (105±2)℃ to constant weight, and determine the moisture content based on the weight loss before and after heating. 4.8.2 Instruments and equipment
Weighing bottle: $50mm×30mm.
4.8.3 Analysis steps
·（6）
Weigh about 10g of sample (accurate to 0.0002g), place it in a weighing bottle that has been weighed to a constant weight, move it into an electric constant temperature drying oven, and heat it at (105±2)℃. Take it out and place it in a desiccator, cool it to room temperature, and weigh it. Repeat this operation until the weight is constant. 4.8.4 Expression of analysis results
The moisture content (X2) expressed as mass percentage is calculated according to formula (7): X2 = m = m2×100
Where: mi
Weighing bottle and The mass of the sample before drying, g; The mass of the weighing bottle and the sample after drying, g; The mass of the sample, g.
4.8.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.05%. 4.9 Determination of heavy metal content
Weigh about 5g of the sample (accurate to 0.01g), place it in a 100mL beaker, add 30mL of water to dissolve, transfer to a 50ml volumetric flask, dilute to the scale with water, and mix well. Dry filter, discard the first 15mL of solution, use a pipette to transfer 10mL of the test solution and place it in a 5 0mL colorimetric tube.
The standard colorimetric solution is to extract 1ml of lead standard solution (1mL solution contains 10μgPb) with a pipette and place it in a 50mL colorimetric tube.
The following operations shall be carried out in accordance with Chapter 6 of GB/T8451--1987. 5 Inspection rules
5.1 This standard adopts type inspection and routine inspection. All ten indicators specified in the requirements are type inspection items, among which the main content, sodium hydroxide, sodium carbonate, chloride, nitrate, iron and moisture are routine inspection items and should be inspected batch by batch. Under normal circumstances, at least one type inspection shall be carried out every three months.
5.2 Each batch of products shall not exceed 1t.
5.3 Determine the number of sampling units in accordance with the provisions of 6.6 of GB/T6678-1986. Each barrel is a packaging unit. When sampling, insert the sampler obliquely from the top of the packaging bag to 3/4 of the material layer for sampling. After mixing the collected samples, cut them into about 500g by quartering method, and immediately put them into two clean wide-mouth bottles with ground stoppers and seal them. Paste labels on the bottles, indicating the manufacturer name, product name, grade, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other is kept for three months for reference. 75
HG 3581-1999
5.4 Industrial sodium azide should be inspected by the quality supervision department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that each batch of products shipped from the factory meets the requirements of this standard. If one of the indicators in the inspection results does not meet the requirements of this standard, samples should be taken from twice the amount of packaging for re-inspection. Even if only one indicator in the re-inspection results does not meet the requirements of this standard, the entire batch of products will 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. 6 Marking, packaging, transportation and storage
6.1 Industrial sodium azide packaging barrels should have firm and clear markings, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date and the number of this standard, as well as the "highly toxic" specified in GB190 and the "heat-averse" and "moisture-averse" marks specified in GB191.
6.2 Each batch of industrial sodium azide 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 meets this standard and the number of this standard. 6.3 Industrial sodium azide is packaged in cardboard barrels. The inner packaging is a polyethylene plastic film bag with a thickness of not less than 0.08mm. The outer packaging is a cardboard barrel with a thickness of not less than 4mm, and its performance and inspection methods should comply with relevant regulations. The net content of each barrel is 50kg or 25kg. If the user has other requirements for packaging, negotiate to resolve. 6.4 When packing industrial sodium azide, the inner plastic bag should be tied with polypropylene strapping rope or rope of equivalent quality, or sealed with other equivalent methods. The outer packaging barrel should be clamped with a clamping ring and the latch should be inserted. 6.5 Industrial sodium azide should be covered during transportation to prevent sun exposure, rain and moisture. Open flames are strictly prohibited to prevent impact and damage. The hazard code is UN1687.
6.6 Industrial sodium azide should be stored in a cool and dry place to prevent rain and moisture. Prevent sun exposure and heat. 7 Safety
7.1 Industrial sodium azide can explode violently when exposed to high heat, severe vibration or contact with heavy metals such as lead, silver, mercury or copper; it can release extremely toxic hydrogen azide gas when in contact with acid.
7.2 Industrial sodium azide is a highly toxic substance. Production personnel should avoid direct contact with sodium azide or its dust during the production process; the workshop for producing sodium azide should be well ventilated.
7.3 If sodium azide is accidentally ingested in one day, a doctor should be consulted in time. If the poisoned person is conscious, let him put his finger into his throat while drinking water and milk to force vomiting. Never let the unconscious poisoned person eat anything. Once the poisoned person is unconscious or has convulsions, he needs to be rushed to the hospital for emergency treatment and do not do anything on his own. Medical First Aid Guide No. 220.7.4 For those who inhale sodium azide, seek medical help in time. Move the poisoned person to a place with fresh air. If breathing is difficult, oxygen should be given; if breathing stops, artificial respiration should be performed. 7.5 If sodium azide splashes into the eyes or on the skin, rinse immediately with plenty of water. 76
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Appendix A
(Suggested Appendix)
Treatment of Sodium Azide Waste Samples
After the test, dissolve the remaining sodium azide sample in water, combine it with the remaining test solution, add an appropriate amount of sodium nitrite, and then add an appropriate amount of 150g/L~200g/L nitric acid solution to decompose the azide. The reaction must be carried out in a fume hood. After destruction, use ferric chloride solution to check N ions (ferric chloride reacts with N: ions to produce a bright blood red color, and this reaction is very sensitive).4 Determination
Use a pipette to transfer 15 mL of solution A and blank test solution respectively, and place them in 100 mL volumetric flasks. Then follow the steps in 5.3.2 of GB/T3049-1986, starting from adding water to about 60 mL.74
4.7.5 Expression of analysis results
HG 3581—1999
The iron (Fe) content (X:) expressed as mass percentage is calculated according to formula (6): (ml -mo)× 10--
m×250
Where.mi -The mass of iron in the test solution found from the working curve, mg; the mass of iron in the blank test solution found from the working curve, mg; ma
m. The mass of the sample, g.
4.7.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.005%. 4.8 Determination of moisture
4.8.1 Summary of method
Bake the sample at (105±2)℃ to constant weight, and determine the moisture content based on the weight loss before and after heating. 4.8.2 Instruments and equipment
Weighing bottle: $50mm×30mm.
4.8.3 Analysis steps
·（6）
Weigh about 10g of sample (accurate to 0.0002g), place it in a weighing bottle that has been weighed to a constant weight, move it into an electric constant temperature drying oven, and heat it at (105±2)℃. Take it out and place it in a desiccator, cool it to room temperature, and weigh it. Repeat this operation until the weight is constant. 4.8.4 Expression of analysis results
The moisture content (X2) expressed as mass percentage is calculated according to formula (7): X2 = m = m2×100
Where: mi
Weighing bottle and The mass of the sample before drying, g; The mass of the weighing bottle and the sample after drying, g; The mass of the sample, g.
4.8.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference of the parallel determination results shall not exceed 0.05%. 4.9 Determination of heavy metal content
Weigh about 5g of the sample (accurate to 0.01g), place it in a 100mL beaker, add 30mL of water to dissolve, transfer to a 50ml volumetric flask, dilute to the scale with water, and mix well. Dry filter, discard the first 15mL of solution, use a pipette to transfer 10mL of the test solution and place it in a 5 0mL colorimetric tube.
The standard colorimetric solution is to extract 1ml of lead standard solution (1mL solution contains 10μgPb) with a pipette and place it in a 50mL colorimetric tube.
The following operations shall be carried out in accordance with Chapter 6 of GB/T8451--1987. 5 Inspection rules
5.1 This standard adopts type inspection and routine inspection. All ten indicators specified in the requirements are type inspection items, among which the main content, sodium hydroxide, sodium carbonate, chloride, nitrate, iron and moisture are routine inspection items and should be inspected batch by batch. Under normal circumstances, at least one type inspection shall be carried out every three months.
5.2 Each batch of products shall not exceed 1t.
5.3 Determine the number of sampling units in accordance with the provisions of 6.6 of GB/T6678-1986. Each barrel is a packaging unit. When sampling, insert the sampler obliquely from the top of the packaging bag to 3/4 of the material layer for sampling. After mixing the collected samples, cut them into about 500g by quartering method, and immediately put them into two clean wide-mouth bottles with ground stoppers and seal them. Paste labels on the bottles, indicating the manufacturer name, product name, grade, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other is kept for three months for reference. 75
HG 3581-1999
5.4 Industrial sodium azide should be inspected by the quality supervision department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that each batch of products shipped from the factory meets the requirements of this standard. If one of the indicators in the inspection results does not meet the requirements of this standard, samples should be taken from twice the amount of packaging for re-inspection. Even if only one indicator in the re-inspection results does not meet the requirements of this standard, the entire batch of products will 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. 6 Marking, packaging, transportation and storage
6.1 Industrial sodium azide packaging barrels should have firm and clear markings, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date and the number of this standard, as well as the "highly toxic" specified in GB190 and the "heat-averse" and "moisture-averse" marks specified in GB191.
6.2 Each batch of industrial sodium azide 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 meets this standard and the number of this standard. 6.3 Industrial sodium azide is packaged in cardboard barrels. The inner packaging is a polyethylene plastic film bag with a thickness of not less than 0.08mm. The outer packaging is a cardboard barrel with a thickness of not less than 4mm, and its performance and inspection methods should comply with relevant regulations. The net content of each barrel is 50kg or 25kg. If the user has other requirements for packaging, negotiate to resolve. 6.4 When packing industrial sodium azide, the inner plastic bag should be tied with polypropylene strapping rope or rope of equivalent quality, or sealed with other equivalent methods. The outer packaging barrel should be clamped with a clamping ring and the latch should be inserted. 6.5 Industrial sodium azide should be covered during transportation to prevent sun exposure, rain and moisture. Open flames are strictly prohibited to prevent impact and damage. The hazard code is UN1687.
6.6 Industrial sodium azide should be stored in a cool and dry place to prevent rain and moisture. Prevent sun exposure and heat. 7 Safety
7.1 Industrial sodium azide can explode violently when exposed to high heat, severe vibration or contact with heavy metals such as lead, silver, mercury or copper; it can release extremely toxic hydrogen azide gas when in contact with acid.
7.2 Industrial sodium azide is a highly toxic substance. Production personnel should avoid direct contact with sodium azide or its dust during the production process; the workshop for producing sodium azide should be well ventilated.
7.3 If sodium azide is accidentally ingested in one day, a doctor should be consulted in time. If the poisoned person is conscious, let him put his finger into his throat while drinking water and milk to force vomiting. Never let the unconscious poisoned person eat anything. Once the poisoned person is unconscious or has convulsions, he needs to be rushed to the hospital for emergency treatment and do not do anything on his own. Medical First Aid Guide No. 220.7.4 For those who inhale sodium azide, seek medical help in time. Move the poisoned person to a place with fresh air. If breathing is difficult, oxygen should be given; if breathing stops, artificial respiration should be performed. 7.5 If sodium azide splashes into the eyes or on the skin, rinse immediately with plenty of water. 76
HG 3581—1999
Appendix A
(Suggested Appendix)
Treatment of Sodium Azide Waste Samples
After the test, dissolve the remaining sodium azide sample in water, combine it with the remaining test solution, add an appropriate amount of sodium nitrite, and then add an appropriate amount of 150g/L~200g/L nitric acid solution to decompose the azide. The reaction must be carried out in a fume hood. After destruction, use ferric chloride solution to check N ions (ferric chloride reacts with N: ions to produce a bright blood red color, and this reaction is very sensitive).mi
Weigh the mass of the weighing bottle and the sample before drying, g;;Weigh the mass of the weighing bottle and the sample after drying, g;The mass of the sample, g.
4.8.5 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference of the parallel determination results shall not exceed 0.05%. 4.9 Determination of heavy metal content
Weigh about 5g of the sample (accurate to 0.01g), place it in a 100mL beaker, add 30mL of water to dissolve, transfer to a 50ml volumetric flask, dilute to the scale with water, and mix well. Dry filter, discard the first 15mL of solution, and use a pipette to transfer 10mL of the test solution into a 50mL colorimetric tube.
The standard colorimetric solution is to extract 1ml of the lead standard solution (1mL of solution contains 10μgPb) with a pipette and place it in a 50mL colorimetric tube.
The following shall be operated in accordance with Chapter 6 of GB/T8451--1987. 5 Inspection Rules
5.1 This standard adopts type inspection and routine inspection. All ten indicators specified in the requirements are type inspection items, among which the main content, sodium hydroxide, sodium carbonate, chloride, nitrate, iron and moisture are routine inspection items and should be inspected batch by batch. Under normal circumstances, at least one type inspection shall be carried out every three months.
5.2 Each batch of products shall not exceed 1t.
5.3 Determine the number of sampling units in accordance with the provisions of 6.6 of GB/T6678-1986. Each barrel is a packaging unit. When sampling, insert the sampler obliquely from the top of the packaging bag to 3/4 of the material layer for sampling. After mixing the collected samples, reduce them to about 500g according to the quartering method, and immediately put them into two clean and dry wide-mouth bottles with ground stoppers and seal them. A label is attached to the bottle, 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 three months for future reference. 75
HG 3581-1999
5.4 Industrial sodium azide shall be inspected by the quality supervision 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 inspection results does not meet the requirements of this standard, samples shall be taken from twice the amount of packaging for re-inspection. Even if only one indicator in the re-inspection 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. 6 Marking, packaging, transportation and storage
6.1 Industrial sodium azide packaging barrels should have firm and clear markings, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date and the number of this standard, as well as the "highly toxic" specified in GB190 and the "heat-averse" and "moisture-averse" marks specified in GB191.
6.2 Each batch of industrial sodium azide 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 meets this standard and the number of this standard. 6.3 Industrial sodium azide is packaged in cardboard barrels. The inner packaging is a polyethylene plastic film bag with a thickness of not less than 0.08mm. The outer packaging is a cardboard barrel with a thickness of not less than 4mm, and its performance and inspection methods should comply with relevant regulations. The net content of each barrel is 50kg or 25kg. If the user has other requirements for packaging, negotiate to resolve. 6.4 When packing industrial sodium azide, the inner plastic bag should be tied with polypropylene strapping rope or rope of equivalent quality, or sealed with other equivalent methods. The outer packaging barrel should be clamped with a clamping ring and the latch should be inserted. 6.5 Industrial sodium azide should be covered during transportation to prevent sun exposure, rain and moisture. Open flames are strictly prohibited to prevent impact and damage. The hazard code is UN1687.
6.6 Industrial sodium azide should be stored in a cool and dry place to prevent rain and moisture. Prevent sun exposure and heat. 7 Safety
7.1 Industrial sodium azide can explode violently when exposed to high heat, severe vibration or contact with heavy metals such as lead, silver, mercury or copper; it can release extremely toxic hydrogen azide gas when in contact with acid.
7.2 Industrial sodium azide is a highly toxic substance. Production personnel should avoid direct contact with sodium azide or its dust during the production process; the workshop for producing sodium azide should be well ventilated.
7.3 If sodium azide is accidentally ingested in one day, a doctor should be consulted in time. If the poisoned person is conscious, let him put his finger into his throat while drinking water and milk to force vomiting. Never let the unconscious poisoned person eat anything. Once the poisoned person is unconscious or has convulsions, he needs to be rushed to the hospital for emergency treatment and do not do anything on his own. Medical First Aid Guide No. 220.7.4 For those who inhale sodium azide, seek medical help in time. Move the poisoned person to a place with fresh air. If breathing is difficult, oxygen should be given; if breathing stops, artificial respiration should be performed. 7.5 If sodium azide splashes into the eyes or on the skin, rinse immediately with plenty of water. 76
HG 3581—1999
Appendix A
(Suggested Appendix)
Treatment of Sodium Azide Waste Samples
After the test, dissolve the remaining sodium azide sample in water, combine it with the remaining test solution, add an appropriate amount of sodium nitrite, and then add an appropriate amount of 150g/L~200g/L nitric acid solution to decompose the azide. The reaction must be carried out in a fume hood. After destruction, use ferric chloride solution to check N ions (ferric chloride reacts with N: ions to produce a bright blood red color, and this reaction is very sensitive).mi
Weigh the mass of the weighing bottle and the sample before drying, g;;Weigh the mass of the weighing bottle and the sample after drying, g;The mass of the sample, g.
4.8.5 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference of the parallel determination results shall not exceed 0.05%. 4.9 Determination of heavy metal content
Weigh about 5g of the sample (accurate to 0.01g), place it in a 100mL beaker, add 30mL of water to dissolve, transfer to a 50ml volumetric flask, dilute to the scale with water, and mix well. Dry filter, discard the first 15mL of solution, and use a pipette to transfer 10mL of the test solution into a 50mL colorimetric tube.
The standard colorimetric solution is to extract 1ml of the lead standard solution (1mL of solution contains 10μgPb) with a pipette and place it in a 50mL colorimetric tube.
The following shall be operated in accordance with Chapter 6 of GB/T8451--1987. 5 Inspection Rules
5.1 This standard adopts type inspection and routine inspection. All ten indicators specified in the requirements are type inspection items, among which the main content, sodium hydroxide, sodium carbonate, chloride, nitrate, iron and moisture are routine inspection items and should be inspected batch by batch. Under normal circumstances, at least one type inspection shall be carried out every three months.
5.2 Each batch of products shall not exceed 1t.
5.3 Determine the number of sampling units in accordance with the provisions of 6.6 of GB/T6678-1986. Each barrel is a packaging unit. When sampling, insert the sampler obliquely from the top of the packaging bag to 3/4 of the material layer for sampling. After mixing the collected samples, reduce them to about 500g according to the quartering method, and immediately put them into two clean and dry wide-mouth bottles with ground stoppers and seal them. A label is attached to the bottle, 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 three months for future reference. 75
HG 3581-1999
5.4 Industrial sodium azide shall be inspected by the quality supervision 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 inspection results does not meet the requirements of this standard, samples shall be taken from twice the amount of packaging for re-inspection. Even if only one indicator in the re-inspection 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. 6 Marking, packaging, transportation and storage
6.1 Industrial sodium azide packaging barrels should have firm and clear markings, including the manufacturer's name, address, product name, trademark, grade, net content, batch number or production date and the number of this standard, as well as the "highly toxic" specified in GB190 and the "heat-averse" and "moisture-averse" marks specified in GB191.
6.2 Each batch of industrial sodium azide 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 meets this standard and the number of this standard. 6.3 Industrial sodium azide is packaged in cardboard barrels. The inner packaging is a polyethylene plastic film bag with a thickness of not less than 0.08mm. The outer packaging is a cardboard barrel with a thickness of not less than 4mm, and its performance and inspection methods should comply with relevant regulations. The net content of each barrel is 50kg or 25kg. If the user has other requirements for packaging, negotiate to resolve. 6.4 When packing industrial sodium azide, the inner plastic bag should be tied with polypropylene strapping rope or rope of equivalent quality, or sealed with other equivalent methods. The outer packaging barrel should be clamped with a clamping ring and the latch should be inserted. 6.5 Industrial sodium azide should be covered during transportation to prevent sun exposure, rain and moisture. Open flames are strictly prohibited to prevent impact and damage. The hazard code is UN1687.
6.6 Industrial sodium azide should be stored in a cool and dry place to prevent rain and moisture. Prevent sun exposure and heat. 7 Safety
7.1 Industrial sodium azide can explode violently when exposed to high heat, severe vibration or contact with heavy metals such as lead, silver, mercury or copper; it can release extremely toxic hydrogen azide gas when in contact with acid.
7.2 Industrial sodium azide is a highly toxic substance. Production personnel should avoid direct contact with sodium azide or its dust during the production process; the workshop for producing sodium azide should be well ventilated.
7.3 If sodium azide is accidentally ingested in one day, a doctor should be consulted in time. If the poisoned person is conscious, let him put his finger into his throat while drinking water and milk to force vomiting. Never let the unconscious poisoned person eat anything. Once the poisoned person is unconscious or has convulsions, he needs to be rushed to the hospital for emergency treatment and do not do anything on his own. Medical First Aid Guide No. 220.7.4 For those who inhale sodium azide, seek medical help in time. Move the poisoned person to a place with fresh air. If breathing is difficult, oxygen should be given; if breathing stops, artificial respiration should be performed. 7.5 If sodium azide splashes into the eyes or on the skin, rinse immediately with plenty of water. 76
HG 3581—1999
Appendix A
(Suggested Appendix)
Treatment of Sodium Azide Waste Samples
After the test, dissolve the remaining sodium azide sample in water, combine it with the remaining test solution, add an appropriate amount of sodium nitrite, and then add an appropriate amount of 150g/L~200g/L nitric acid solution to decompose the azide. The reaction must be carried out in a fume hood. After destruction, use ferric chloride solution to check N ions (ferric chloride reacts with N: ions to produce a bright blood red color, and this reaction is very sensitive).4 When packing industrial sodium azide, the inner plastic bag should be tied with polypropylene strapping rope or rope of equivalent quality, folded in half and tied separately, or sealed with other equivalent methods, and the outer packaging barrel should be clamped with a clamping ring and the latch should be inserted. 6.5 Industrial sodium azide should be covered during transportation to prevent sun exposure, rain and moisture. Open flames are strictly prohibited to prevent impact and damage. The hazard code is UN1687.
6.6 Industrial sodium azide should be stored in a cool and dry place to prevent rain and moisture. Prevent sun exposure and heat. 7 Safety
7.1 Industrial sodium azide can explode violently when exposed to high heat, severe vibration or contact with heavy metals such as lead, silver, mercury or copper; contact with acid can release extremely toxic hydrogen azide gas.
7.2 Industrial sodium azide is a highly toxic drug. Production personnel should avoid direct contact with sodium azide or its dust during the production process; the workshop for producing sodium azide should be well ventilated.
7.3 If sodium azide is accidentally ingested, a doctor should be consulted immediately. If the poisoned person is conscious, let him drink water and milk while putting a finger into his throat to force vomiting. Never let the unconscious poisoned person eat anything. Once the poisoned person is unconscious or has convulsions, he needs to be rushed to the hospital for emergency treatment and do not do anything on his own. Medical First Aid Guide No. 220.7.4 For those who inhale sodium azide, seek medical help immediately. Move the poisoned person to a place with fresh air. If breathing is difficult, give oxygen; if breathing stops, artificial respiration is required. 7.5 If sodium azide splashes into the eyes or on the skin, rinse immediately with plenty of water. 76
HG 3581—1999
Appendix A
(Suggested Appendix)
Treatment of Sodium Azide Waste Samples
After the test, dissolve the remaining sodium azide sample in water, combine it with the remaining test solution, add an appropriate amount of sodium nitrite, and then add an appropriate amount of 150g/L~200g/L nitric acid solution to decompose the azide. The reaction must be carried out in a fume hood. After destruction, use ferric chloride solution to check N ions (ferric chloride reacts with N: ions to produce a bright blood red color, and this reaction is very sensitive).4 When packing industrial sodium azide, the inner plastic bag should be tied with polypropylene strapping rope or rope of equivalent quality, folded in half and tied separately, or sealed with other equivalent methods, and the outer packaging barrel should be clamped with a clamping ring and the latch should be inserted. 6.5 Industrial sodium azide should be covered during transportation to prevent sun exposure, rain and moisture. Open flames are strictly prohibited to prevent impact and damage. The hazard code is UN1687.
6.6 Industrial sodium azide should be stored in a cool and dry place to prevent rain and moisture. Prevent sun exposure and heat. 7 Safety
7.1 Industrial sodium azide can explode violently when exposed to high heat, severe vibration or contact with heavy metals such as lead, silver, mercury or copper; contact with acid can release extremely toxic hydrogen azide gas.
7.2 Industrial sodium azide is a highly toxic drug. Production personnel should avoid direct contact with sodium azide or its dust during the production process; the workshop for producing sodium azide should be well ventilated.
7.3 If sodium azide is accidentally ingested, a doctor should be consulted immediately. If the poisoned person is conscious, let him drink water and milk while putting a finger into his throat to force vomiting. Never let the unconscious poisoned person eat anything. Once the poisoned person is unconscious or has convulsions, he needs to be rushed to the hospital for emergency treatment and do not do anything on his own. Medical First Aid Guide No. 220.7.4 For those who inhale sodium azide, seek medical help immediately. Move the poisoned person to a place with fresh air. If breathing is difficult, give oxygen; if breathing stops, artificial respiration is required. 7.5 If sodium azide splashes into the eyes or on the skin, rinse immediately with plenty of water. 76
HG 3581—1999
Appendix A
(Suggested Appendix)
Treatment of Sodium Azide Waste Samples
After the test, dissolve the remaining sodium azide sample in water, combine it with the remaining test solution, add an appropriate amount of sodium nitrite, and then add an appropriate amount of 150g/L~200g/L nitric acid solution to decompose the azide. The reaction must be carried out in a fume hood. After destruction, use ferric chloride solution to check N ions (ferric chloride reacts with N: ions to produce a bright blood red color, and this reaction is very sensitive).
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