This standard specifies the requirements, test methods, marking, labeling, packaging, storage and transportation of 10% chlorothalonil smoke tablets. This standard applies to 10% chlorothalonil smoke tablets made from chlorothalonil technical material that meets the national standard GB9551 and suitable combustion aids, fuels and fillers. GB 18172.2-2000 10% chlorothalonil smoke tablets GB18172.2-2000 Standard download decompression password: www.bzxz.net

ICS.65.100
National Standard of the People's Republic of China
GB18172.2—2000
10% Chlorothalonil smoke tablets
10% Chlorothalonil smoke tablets2000-07-31 Issued
2001-03-01 Implementation
State Administration of Quality and Technical Supervision
GB18172.2—2000
Chapter 3 and Chapter 5 of this standard are mandatory, and the rest are recommended. This standard is formulated on the basis of domestic enterprise standards and relevant materials in accordance with the requirements of GB/T1.1-1993 "Guidelines for Standardization Work Unit 1: Drafting and Expression Rules of Standards Basic Regulations for Standardization". This standard is proposed by the State Bureau of Petroleum and Chemical Industry of the People's Republic of China. This standard is under the technical jurisdiction of Shenyang Chemical Industry Research Institute. This standard is interpreted by the Secretariat of the National Technical Committee for Pesticide Standardization. The responsible drafting units of this standard are: Shenyang Chemical Industry Research Institute, Hunan Nantian Industrial Co., Ltd. The participating drafting units of this standard are: Beijing Chenyang Plant Protection Preparation Factory. The main drafters of this standard are: Wang Yufan, Liu Yong, Xing Hong, Liu Yaoqiu, Wang Yinzhong, Xiao Dongliang, Jiang Zhiguo. Part 1:
National Standard of the People's Republic of China
10% Chlorothalonil Smoke Tablets
10% Chlorothalonil Other names, structural formulas and basic physicochemical parameters of the active ingredient chlorothalonil in this product are as follows: ISO common name: Chlorothalonil
CIPAC digital code: 288
Chemical name: 2,4,5,6-tetrachloro-1,3-dicyanobenzene Structural formula:
Empirical formula: C.NCl
Relative molecular mass: 265.91 (according to the 1997 international relative atomic mass) Biological activity: bactericidal
Melting point: 250℃~251℃|| tt||Boiling point: 350℃
Vapor pressure (40℃): 1.3Pa
GB18172.2—2000
Solubility (g/L, 25℃): 6×10-* in water, 80 in xylene, 2 in acetone, 30 in cyclohexanone and dimethylformamide, 10 in kerosene Stability: Stable under normal temperature storage conditions, stable to weak alkali or weak acidic media and to light, decomposes 1 in strong alkali media Scope
This standard specifies the requirements, test methods, and marking, labeling, packaging, storage and transportation of 10% chlorothalonil smoke tablets. This standard applies to 10% chlorothalonil smoke tablets made from chlorothalonil technical materials that meet the national standard GB9551 and suitable combustion aids, fuels, and fillers.
2 Cited 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. GB/T1601—1993 Method for determination of pH value of pesticides GB/T1604—1995 Acceptance rules for commercial pesticides GB/T1605—1979 (1989) Sampling method for commercial pesticides GB3796—1999 General rules for pesticide packaging
GB9551—1999 Chlorothalonil technical
GB/T16150—1995
5 Method for determination of fineness of pesticide powders and wettable powders Approved by the State Administration of Quality and Technical Supervision on July 31, 2000 Implementation on March 1, 2001
GB18172.1——2000
3 Requirements
GB18172.2-—2000
Chlorothalonil smoke powder granules
3.1 Appearance: round flake solid.
3.210% Thiophanate smoke tablets shall meet the requirements of Table 1. Table 1 Thiophanate smoke tablets control item indicators
Thiophanate content, %
Tablet mass, g
Hexachlorobenzene content, %
Heating loss, %
pH range
Ignition test
Burn and smoke time, min
Autoignition temperature, ℃
Smoke formation rate, %
Drop and breakage rate, %
Powder and fragments, %
Accelerated storage testbzxZ.net
1Hexachlorobenzene, autoignition temperature and smoke formation rate are only tested once for the same batch of raw materials. 2 Strength and accelerated storage test Under normal production conditions, the test method shall be carried out at least once every three months
4.1 Sampling
25.0±1.0 or 50.0±2.0
Refer to the relevant provisions in GB/T1605-1979 (1989), and only one batch of samples shall be drawn, and the sampling volume shall not be less than 100g. Identification test
Perform in accordance with 4.2 of GB18172.1-2000. 4.3 Determination of thiophanate-methyl content
4.3.1 Weigh and grind the sample containing 0.1g (accurate to 0.0002g) of thiophanate-methyl. Perform in accordance with 4.3 of GB18172.1-2000. 1-O-diphenylbenzene; 2-Tetrachloroterephthalonitrile; 3-Biothalonil 1 Gas chromatogram of thiophanate-methyl smoke tablets
4.3.2 Allowable difference
GB18172.2--2000
The difference between two parallel determination results shall not exceed 0.3%. The arithmetic mean value shall be taken as the determination result. 4.4 Determination of hexachlorobenzene content
Perform according to 4.4 of GB18172.1-2000. 1-Biothalonil; 2-Hexachlorobenzene
Figure 2 High performance liquid chromatogram of hexachlorobenzene in thiophanate-methyl smoke tablets 4.5 Determination of heating loss
Weigh 5.0g of the finely ground and mixed sample (accurate to 0.001g). Perform according to 4.5 of GB18172.1-2000. 4.6 Determination of pH range
Take the finely ground and mixed sample in 4.3 and conduct the test according to GB/T1601. 4.7 Determination of ignition test and burning smoke time Weigh 50g of the sample (one or two complete pieces), place it in a sheltered place and ignite it. If there is no flame or extinguishing during the combustion process, it burns evenly and there is no residual explosion after combustion, the ignition test is qualified. The time from the time the sample is ignited and smokes to the time when it stops smoking is measured by a stopwatch as the burning smoke time.
4.8 Determination of spontaneous combustion temperature
4.8.1 Summary of method
The sample is placed on the asbestos net (test bench) suspended in the beaker, and the thermometer is inserted into the asbestos net through the socket of the beaker cover. The lower part of the beaker is an electric furnace, and the spontaneous combustion temperature of the sample is measured under the continuous heating of the electric furnace. 4.8.2 Instruments and equipment
The same as 4.9.2 in GB18172.1-2000. 4.8.3 Determination
Weigh a sample of about 1.0g and place it in the center of the asbestos mesh test bench. Then insert the contact thermometer and mercury thermometer into the beaker through the two holes in the beaker cover, contact the test bench, and the two thermometer mercury balls are about 0.5cm away from the edge of the test bench. Adjust the contact thermometer knob to 100℃±5℃ at one time. After the temperature stabilizes, adjust the contact thermometer knob at a rate of 5℃~10℃ per minute. When it is close to smoking, adjust the contact thermometer knob at a rate of 1℃~2℃ per minute. Observe the mercury thermometer and the sample at the same time. At the moment when the sample smokes, the temperature indicated by the mercury thermometer is the auto-ignition temperature.
4.8.4 Allowable deviation
GB18172.2--2000
The difference between the results of two parallel measurements shall not exceed 10℃C. Take the arithmetic mean as the measurement result. 4.9 Determination of smoke formation rate
Weigh a block sample containing about 0.3g (accurate to 0.0002g) of thiophanate-methyl. Perform according to 4.10 of GB18172.1-2000. 4.10 Determination of drop breakage rate
4.10.1 Operation method
Weigh a piece of sample (accurate to 0.1g), place it at a height of 0.5m above the smooth cement floor, let it fall freely to the ground with the flat surface facing the ground, and weigh the main body of the sample (the largest piece). Perform the test ten times in a row and take the average value as the test result. 4.10.2 Calculation of tablet drop breakage rate X1 (%) Calculate according to formula (1): X1 (%) = ml = m2 × 100 (1) Where: m1 - mass of the sample, g; m2 - mass of the main body of the sample after the test, g; x1 - the tablet drop breakage rate measured once for the sample, %; X1 - the average tablet drop breakage rate measured for the sample, %. 4.11 Determination of tablet mass, powder and fragments 4.11.1 Instrument Industrial balance: sensitivity 0.1 g. 4.11.2 Determination of tablet mass
Gather 20 to 30 samples that are packaged intact and weigh them on an industrial balance. Record the mass of each piece. The average of the weighing results is the determination result.
4.11.3 Determination and calculation of powder and fragments Collect all powder and fragments from 20 to 30 samples that are packaged intact and weigh them on an industrial balance. Record their mass. The mass fraction of powder and powder flakes X2(%) is calculated according to formula (2): m1×100
X2(%)=
Wherein, m1 is the mass of powder and fragments, g; m2
The mass of a sample, 8.
4.12 Accelerated storage test
4.12.1 Summary of method
The product is aged at an accelerated rate through a pressurized hot storage test to predict the changes in product performance when stored at room temperature. 4.12.2 Test steps
(2)
Put a tablet sample of about 50g (or 25g) into a sealed plastic bag, place it in an oven, and store it at 54℃±2℃ for 14d. Take out the sample, put it in a desiccator, and let it cool to room temperature. Within 24h, complete the determination of the active ingredient content and smoke formation rate according to 4.3 and 4.9. The active ingredient content and smoke formation rate meet the requirements of this standard and are qualified. 4.13 Inspection and acceptance of products
Should comply with the provisions of GB/T1604. The processing of limit values ​​and the judgment of results shall adopt the rounded value comparison method in GB/T1250. 5 Marking, labeling, packaging, storage and transportation
5.1 The marking, labeling and packaging of chlorothalonil smoke tablets shall comply with the relevant provisions of GB3796-1999. 4
GB18172.2—2000
5.2 This product is packed in paper box or plastic box lined with plastic bag, with net weight of 100g~200g per box, and outer packing is calcium plastic box or corrugated paper box, with net weight of no more than 10kg per box.
5.3 Other forms of packing can be used according to user requirements or order agreement, but they must comply with the provisions of GB3796. 5.4 The package should be stored in a ventilated and dry warehouse. 5.5 During storage and transportation, strictly prevent moisture and sunlight, do not mix with food, seeds, feed, avoid contact with skin and eyes, and prevent inhalation through the mouth and nose. 5.6 Safety: This product is a low-toxic preparation. When using this product, you should wear protective gloves, masks (or gas masks), and clean protective clothing. After applying the pesticide, stay away from the place of ignition. If poisoning occurs, ask a doctor to take rescue measures or provide treatment. 5.7 Warranty period: Under the specified storage and transportation conditions, the warranty period of Thiophanate-Clear Smoke Tablets is 2 years from the date of production.
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