GB/T 29879-2013 Classification method for hazardous properties of ammonium nitrate substances GB/T29879-2013 Standard compression package decompression password: www.bzxz.net
This standard specifies the terms and definitions, principles, reagents, instruments, ammonium nitrate content determination, combustible content determination and classification of the hazardous properties classification test of ammonium nitrate substances. This standard is applicable to the classification of hazardous properties of ammonium nitrate substances.
This standard is drafted in accordance with the rules given in GB/T1.1-2009.
This standard is consistent with the technical content related to ammonium nitrate substances in the United Nations "Recommendations on the Transport of Dangerous Goods Model Regulations" (16th revised edition) and the United Nations "Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria" (5th revised edition).
This standard is proposed and managed by the National Technical Committee for the Management of Dangerous Chemicals Standards (SAC/TC251).
The drafting units of this standard: Inspection and Quarantine Technical Center of Hunan Entry-Exit Inspection and Quarantine Bureau, Tianjin Entry-Exit Inspection and Quarantine Bureau, Jiangnan University.
The main drafters of this standard: Wang Libing, Xiong Zhongqiang, Xu Chuanlai, Yu Yanjun, Li Ningtao, Zhou Lei.
The following documents are indispensable for the application of this document. For any dated referenced document, only the dated version applies to this document. For any undated referenced document, the latest version (including all amendments) applies to this document.
GB/T601 Preparation of standard titration solutions for chemical reagents
GB/T6682 Specifications and test methods for water for analytical laboratories
United Nations "Recommendations on the Transport of Dangerous Goods Model Regulations" (16th revised edition)
United Nations "Recommendations on the Transport of Dangerous Goods Manual of Tests and Criteria" (Fifth revised edition)

ICS13.300
National Standard of the People's Republic of China
GB/T298792013
Test method for hazard classification of ammonium nitrateIssued on November 12, 2013
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
Implementation on May 1, 2014
This standard is consistent with the relevant technical contents of the United Nations Recommendations on the Transport of Dangerous Goods Model Regulations, sixteenth revised edition and the United Nations Recommendations on the Transport of Dangerous Goods Test and Standards Volume 5 revised edition. This standard is proposed and managed by the National Technical Committee for the Administration of Hazardous Chemicals (SAC/TC251). The units of this standard are: Chaonan Entry-Exit Inspection and Quarantine Inspection and Control Technical Commission, Tianlanshan Entry-Exit Inspection and Quarantine Bureau, Yinnan People's University. The main drafters of this standard are: Li Bing, Xiong Zhongqiang, Bei Chuanlai, He Jun, Li Ningyou, Zhou Lei 1 Scope
Classification method for hazardous properties of ammonium nitrate substances GB/T 29879—2013
This standard specifies the technical principles and definitions of hazardous properties of mineral acid chain substances, reagents, storage acid content determination, combustible content determination and classification
This standard is used for the classification of hazardous properties of nitric acid substances. 2 Normative references
The following documents are indispensable for the application of this document. They are referenced documents of the specified period. Only the versions of the specified period are applicable to this document. For undated referenced documents, the latest version (including all amendments) shall apply to this document. CBT601 Preparation of titration solutions for chemical reagents GB/T6682 Specifications and test methods for water for analysis tests (United Nations Standard for the Transport of Dangerous Goods at Checkpoints, sixteenth revised edition) (United Nations Standard for the Transport of Dangerous Goods at Checkpoints, fifth revised edition) 3 Terms and definitions
The following terms and definitions apply to this document
Explosive substances explosive substances are capable of producing gases by chemical reactions, whose moisture, pressure and temperature are so high that they can cause damage to the surrounding environment (pyrotechnic substances, even if they do not release gases, can also cause damage to the surrounding environment and articles with a total explosion hazard); 3.2 bZxz.net
mass explosion
Instantaneous impact on the entire load; 3.3
oxidizing substances Substanees themselves are not necessarily flammable, but may release oxygen which may cause or promote subsequent combustion of other substances. 3.4
Environmentally hazardous substances Liquid or solid substances that pollute the aquatic environment, and mixtures of such substances (such as preparations and wastes). 3.5
Ammonium nitrate substances
Ammonium nitrale sulistans are substances characterized by a molecular formula of NH, NO, which will decompose violently and explode when contaminated by organic materials or at high temperatures.
4 Principle
After determining the ammonium nitrate and combustible substances in the test mixture and confirming the residual content, follow the United Nations Recommendation 1 on the Transport of Dangerous Goods
GB/T 29879-2013
The Model Regulations for the Transport of Dangerous Goods (16th revised edition) and the fifth revised edition of the Joint Bureau of Transportation's Manual of Notes, Tests and Labeling for Dangerous Goods classify the hazards of nitric acid.
4.1 Determination of ammonium nitrate content
In a neutral solution, caustic soda reacts with light to generate six times the amount of nitrate and an acid equivalent to the amount of nitrate. In the presence of an indicator, titrate with a sodium hydroxide standard solution to calculate the ammonium nitrate content: 4.2 Determination of combustible material content
Under the specified conditions, place the product at 6-2°C and burn it, then weigh the mass and calculate the combustible content. 5 Reagents
Unless otherwise specified, all reagents used are of analytical purity, and water is grade 2 water as specified in G3/T6682. 5. 1. Acid.
5.2 Oxidizing agent.
5.3 Acid-potassium fluoride solution: weigh 6.138g of sodium hydroxide solution, 7.455g of oxidizing agent, dissolve in distilled water to 5101mL. 5.40.1mol/L standard titration solution: measure the sulfur content in accordance with GB/T601, and standardize the solution concentration after decomposition. 5.5 Sodium hydroxide solution: weigh 110g of sodium hydroxide solution, add it into 100mL of water without carbon dioxide, and place it in a sealed container until it becomes clear and transparent.
5.5.10.1mol/L sodium hydroxide standard titration solution: measure the sodium trioxide solution (5.5) and dissolve it in a solution without carbon dioxide to 1000mol/L. Standardize the solution concentration according to the steps specified in GB/T601. 5.5.2C.5mal/L Sodium hydroxide standard titration solution: Measure 27ml of the sodium hydroxide solution (5.5). Use all the carbon dioxide to make up to 1000mL. Sample: Follow the steps specified in GR/T601. Standard solution concentration: 5.6250mmol/L Formaldehyde solution: Collect about 62.1mL of formaldehyde (38%~10%), place it in a 1mL vial, and make up to volume with distilled water.
5.795% ethanol,
5.8Methyl red indicator solution.
5.9Phenol indicator solution:
5.10pH value is 8.5 blue reference solution: add 15.15mL 0.1Eol/L sodium hydroxide solution (6.5.1) and 37.50mL potassium ketoate (5.3) into a 25mL pin bottle, then add 1 drop of nicotine red indicator solution (5.8). 3 drops of phenol indicator solution (5.5). Dilution chamber 50 nl
Laboratory apparatus:
6.2Muffle furnace,
6.3Ceramic stove:
6.4Electrolyte balance: accurate to 0.001g
6.5Precision balance: standard alkaline solution 0.0001g. 2
7 Determination of nitric acid melt pressure
GB/T 29879—2013
Notice: This test has the risk of explosion. The test site should meet the requirements of relevant explosive materials test, and the test personnel should have the necessary safety knowledge and safety protection. To ensure the safety of the test personnel, the sample should be tested with the minimum weight under the premise of meeting the test precision and accuracy.
7.1 Preparation of sample
7.1.1 Adjustment of pH value
Weigh the sample of zone 1 accurately to 0.101, add 250ml. energy bottle, add 1ml. distilled water solution, add 1 drop of basic red index (5.8) + use 0.1mol/L sodium hydroxide standard solution (5.5.1) or 0.1mol/L sulfuric acid standard solution (5.1) to adjust the solution to orange.
7.1.2 Dilution
Samples with nitric acid content exceeding the highest concentration of the standard curve shall be diluted and then subjected to determination of explanatory factors. 7.2 Determination
Add 15 ml of ammonium nitrate solution (5.6) to the sample (7.1) and then add 3 ml of acid microindicator (5.9). Titrate with 0.5(1/1.2) sodium hydroxide standard solution (5.5.2) to a pH of 8.5. The color of the reference solution (5.10) is equal to the color of the empty reference solution or the pH meter indicates 8.5. If the color does not disappear after 1 min, it can be judged as a continuous point. At the same time, the determination of the reagent blank is completed. 7.3 Calculation of results
The mass fraction of ammonium nitrate () is calculated according to the formula (): W, -V2 X- X1.011 01
X100Xd
Wu Zhong:
7.4 Precision
Determine the mass fraction of nitrate;
The volume of standard ammonia solution consumed in the test, in ml (ml);
The volume of standard sodium hydroxide solution consumed in the blank test, in ml (ml);
The density of standard sodium hydroxide solution, in mol/l (mol/L);
The mass of nitrogen expressed in grams equivalent to 1 ml of standard sodium hydride solution;
The mass of the sample, in grams (ml);
The absolute difference between two independent determination results obtained under stable conditions shall not exceed the arithmetic mean. 8 Determination of combustible content
Warning: This test has potential explosion hazard. The test site shall meet the relevant explosive materials test requirements and the test personnel shall have necessary safety knowledge and safety protection. To ensure the safety of test personnel, the sample dosage should be tested for minimum sample weight under the premise of meeting the test precision and accuracy.
GB/T 29879—2013
8.1 Test
8.1.1 Weigh 1 sample accurate to 0.000【g] and bake it in a 105℃ main oven with 2% ventilation. Refine to 0.0801: Weigh 1 sample accurate to 0.000【g] and bake it in a 105℃ main oven with 2% ventilation. Weigh the total weight of the sample and refine to 0.000158.1.2 After that, the sample is moved into a muffle oven at 625℃ with the furnace door closed. The heating time should be increased by at least 11: Open the furnace door to allow the sample to burn for 5 minutes. Close the furnace door and heat for 3 minutes. The burned sample and the sample should be weighed again. The mass difference between the two samples is generally less than 10002g.
8.2 Calculation of results
Ratio of combustible material content (obtained by formula 2) Section: mm.
Combustible material content, active
ground mass, in grams):
%: dried sample added mass, in grams (milligrams): ignition test mass ratio, in grams (h) 8.3
Precision
x100
The absolute difference between the two results obtained under heavy attenuation conditions shall not exceed 10% of the arithmetic mean: 9 Classification
According to the United Nations Recommendations on the Transport of Dangerous Goods (15th edition) and the United Nations Recommendations on the Transport of Dangerous Goods (5th revised edition), the classification of explosive, oxidizing and environmental hazardous properties of substances such as nitrate shall comply with the provisions of Table 1. Table 1 Classification method
Category or item
Plastic plastic
Tough state (20)
Natural acid
National nitric acid
National nitric acid
Commercial ammonium nitrate
Acid-proof equipment and equipment
Strongly combined chemical fertilizer
Homogeneous fertilizer
Hydrothermal method
Non-acid by content/tablet
70--50
Containing material%
U standard
Boundary or item brush
Packing category
Table 1 (continued)
Numerical state 2
Retirement of the city's milk industry
Retirement of the product body, the school
Green reading of the intermediate method of the drug
GB/T 29879-2013
Ammonium nitrate content
Note: When determining the content of ammonium nitrate, all nitrate ions, as long as there are equivalent molecular fragments in the compound, are considered as decomposition. G8/T 29879-2013
Date: 2014 4F0091
National Standard of the People's Republic of China
Technical method for classification of hazardous characteristics of ammonium nitrate-like substances GB/T 29879 - 2013
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