Some standard content:
ICS 71.100.01
National Standard of the People's Republic of China
GB/T4840.3—1999
m-Nitroaniline
Published on 1999-06-08
Implemented on 1999-12-01
State Administration of Quality and Technical Supervision
GB/T4840.3—1999
This standard is non The Japanese Industrial Standard JIS K4105:1995 "Nitroanilines" is equivalently adopted, and the organic impurity content is determined by gas chromatography; the writing format is in accordance with GB/T1.1-1993 "Guidelines for Standardization Work Unit 1: Drafting and Expression Rules of Standards Part 1: Basic Regulations for Standard Writing" and GB/T1.3-1997 "Guidelines for Standardization Work Unit 1: Drafting and Expression Rules of Standards Part 3: Regulations for Writing Product Standards". The inspection items and technical indicators are determined according to the needs of domestic and foreign users and the actual situation of domestic production.
This standard has the following main differences with the Japanese Industrial Standard JIS K4105:1995: 1. This standard determines the total amino value of the product (damp product), while the Japanese Industrial Standard determines the purity of the product (dry product). 2. Although the same stationary liquid phenylsiloxane OV-17 is used in the determination of organic impurities, the carrier of the Japanese Industrial Standard is Chromosorb W-HP of 177~250μm, while this standard is Chromosorb G-AWDMCS. This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is technically managed by the National Technical Committee for Dye Standardization. This standard is drafted by Shenyang Chemical Research Institute and Wujin Southeast Auxiliary Factory. The main drafters of this standard are Li Chunmei, Yang Jiemin, Xing Zhifu, and Jiang Qindi. 1
1Scope
National Standard of the People's Republic of China
m-Nitroaniline
GB/T4840.3—1999
This standard specifies the requirements, sampling, test methods, inspection rules, and marking, labeling, packaging, transportation and storage of m-nitroaniline. This standard applies to the m-nitroaniline obtained by reducing and refining m-dinitrobenzene obtained by nitration of nitrobenzene with mixed acid. This product is mainly used as an intermediate for organic synthesis and dye intermediate. Structural formula:
Molecular formula: CHN202
Relative molecular mass: 138.13 (according to the 1997 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 GB/T603—1988
Preparation of preparations and products used in test methods Chemical reagents
GB/T1250—1989
GB/T 2384—1992
GB/T6682—1992
GB/T9722—1988
3 Requirements
Methods for expressing and determining limit values General method for determination of melting point range of dye intermediates Specifications and test methods for water used in analytical laboratories (neqISO3696:1987) Chemical reagents General rules for gas chromatography
The quality of m-nitroaniline shall conform to the requirements of Table 1. Table 1 Quality requirements for m-nitroaniline
Initial melting point of dry product, ℃
Total amino value, %
Approved by the State Administration of Quality and Technical Supervision on June 8, 1999First-class product
Qualified product
Yellow needle-shaped crystals or powder
Implementation on December 1, 1999
Content of m-dinitrobenzene, %
Content of low-boiling matter, %
Total amount of o-p-nitroaniline, %
Content of high-boiling matter, %
4 Sampling
GB/T4840.3—1999
Table 1 (end)
First-class product
Qualified product
From each batch of products (uniform products are one batch), sample 100% of each batch of products. When sampling, use a probe to take samples from the upper, middle and lower parts. The total amount of sampling shall not be less than 200g. Grind the samples and mix them evenly, and then pack them into two clean and dry wide-mouth bottles with ground stoppers. Label the bottles with the following information: manufacturer name, product name, grade, batch number and sampling date. One bottle is for inspection, and the other is sealed with paraffin and kept for future reference.
5 Test method
Unless otherwise specified, the reagents used in this standard refer to analytical pure reagents, and water should meet the specifications of grade 3 water in GB/T6682. The test results shall be determined by the rounded value comparison method in GB/T1250. 5.1 Appearance
The appearance shall be determined visually.
5.2 Determination of initial melting point of dry product
Perform in accordance with the relevant provisions of GB/T2384. The sample must be dried in an infrared oven at 80-83℃ for 30min. The difference between the results of two parallel determinations should not exceed 0.2℃. The arithmetic mean is taken as the determination result. 5.3 Determination of total amino value
5.3.1 Reagents and materials
Hydrochloric acid,
Sodium nitrite: c(NaNO2)=0.25mol/L standard titration solution, prepared and calibrated according to GB/T601 and GB/T603, but starch potassium iodide test paper is used for endpoint judgment;
Starch potassium iodide test paper.
Potassium bromide: 100g/L solution.
5.3.2 Determination steps
Weigh about 0.7g of m-nitroaniline sample (accurate to 0.0002g), place it in a 400mL clean and dry beaker, add 30mL hydrochloric acid, add 10mL of 100g/L potassium bromide solution and 100mL distilled water, heat to dissolve, dilute to 300mL with distilled water, and cool to 0-10℃. Then insert the tip of the burette into the solution, add 0.25mol/L sodium nitrite standard titration solution (accounting for about 95% of the total required amount) at one time under constant stirring, then lift the tip of the burette from the liquid surface, and add 0.25mol/L sodium nitrite standard titration solution drop by drop until the starch potassium iodide test paper turns slightly blue. After 5 minutes, use the same method to test and it still turns slightly blue, which is the end point. Record the volume V1 of the sodium nitrite standard titration solution consumed, and do a blank test under the same conditions. 5.3.3 Expression and calculation of results
The mass percentage of total amino value is represented by X1 and calculated according to formula (1): 0. 138 1 ×c(V/-V)× 100
Wherein: c——concentration of sodium nitrite standard titration solution, mol/L; V1——volume of sodium nitrite standard titration solution consumed by titrating sample, mL; 2
GB/T4840.3—1999
Vo—volume of sodium nitrite standard titration solution consumed by blank test, mL; m—mass of m-nitroaniline sample, g; 0.1381—mass of m-nitroaniline expressed in grams equivalent to 1.00mL sodium nitrite standard titration solution [c(NaNO2)]=1.000mol/L.
The difference between the two determination results shall not exceed 0.3%, and the arithmetic mean shall be taken as the determination result. 5.4 Determination of organic impurities in m-nitroaniline 5.4.1 Method summary
Use gas chromatography to separate m-nitroaniline and organic impurities on a packed gas chromatographic column, detect with a hydrogen flame ionization detector (FID), and quantify by peak area normalization. 5.4.2 Instrumentation
Gas chromatograph: The instrument sensitivity and stability shall comply with the provisions of GB/T9722; Detector: hydrogen flame ionization detector FID; Data processor: recorder with full scale of 10mV and response time of 1s or a data processor with this function; Chromatographic column: glass column or stainless steel column with inner diameter of 3.2~3.5mm and length of 2m; Micro-syringe: 10μL.
5.4.3 Preparation of chromatographic column
5.4.3.1 Filler
Carrier: Chromosorb G-AWDMCS177~250μm (60~80 mesh); stationary liquid: phenylsiloxane oV-17 (maximum operating temperature 300℃); solvent: chloroform;
Coating degree: stationary liquid/carrier = 4/100
5.4.3.2 Coating of stationary liquid
Weigh 0.8g0V-17 is placed in a 100mL beaker, and then chloroform equivalent to the volume of 20g of the carrier is added. After the 0V-17 is completely dissolved, slowly pour in 20g of the carrier to make it completely soaked (about 10 minutes). Place the beaker in a fume hood and slowly evaporate the solvent under an infrared lamp until it is dry (the beaker should be tapped frequently to ensure that it is evenly coated). Then move it to a 90-100℃ oven to dry for about 30 minutes, and take it out for use. 5.4.3.3 Filling of the stationary phase
Plug the end of the chromatographic column connected to the detector with glass wool, wrap it with gauze, connect it to a vacuum pump, and connect the other end to a funnel. Slowly pour in the dried stationary phase under vacuum, tap the chromatographic column gently to make the filling even and tight. After filling, continue tapping for 5-10 minutes, plug the filled chromatographic column with glass wool, and prepare for aging.
5.4.3.4 Aging of chromatographic column
Install the filled chromatographic column into the column box of the chromatograph, without connecting a detector behind the column, and pass nitrogen at a flow rate of 5-10mL/min, and age at 270℃ for 8-10h.
5.4.4 Chromatographic conditions (optimal operating conditions can be selected according to different instruments) Column temperature: 220℃;
Vaporization temperature: 250℃;
Detection temperature: 250℃;
Carrier gas flow rate (N2): 50mL/min;
Combustion gas flow rate (H2): 50mL/min; Auxiliary gas flow rate (02): 500mL/min; Paper speed: 3mm/min;
Injection volume: 2~3μL,
Quantitative method: Peak area normalization method;
Resolution ：≥1.0
GB/T4840.3—1999
5.4.5 Preparation of standard stock solution and determination of correction factor 5.4.5.1 Reagents
Ethyl acetate;
m-nitroaniline: purity ≥99.5%;
p-nitroaniline: refined product (recrystallized from ethanol three times until no impurities are detected under the test conditions); o-nitroaniline: refined product (recrystallized from ethanol three times until no impurities are detected under the test conditions); m-dinitrobenzene: refined product (recrystallized from ethanol three times until no impurities are detected under the test conditions). 5.4.5.2 Preparation of standard stock solution
According to the requirements of Table 2, accurately weigh various reagents (accurate to 0.0002g) in a clean and dry 25mL volumetric flask, dissolve with ethyl acetate, and dilute to the scale. The shelf life of the standard stock solution is three months. Table 2 Preparation of standard stock solution
Reagent name
Weighing amount,
Volume after dilution, ml
m-dinitrobenzene
5.4.5.3 Preparation of standard mixed solution
p-Nitroaniline
o-Nitroaniline
m-Nitroaniline
In five numbered 10mL brown volumetric flasks, prepare according to Table 3 to obtain mixed solutions No. 1, 2, 3, 4, and 5. The shelf life of the standard mixed solution is one month.
Table 3 Preparation of standard mixed solution
Single standard solution
Liquid A (m-dinitrobenzene), mL
Liquid B (p-nitroaniline), mL
Liquid C (p-nitroaniline), mL
Liquid D (m-nitroaniline), mL
Total volume after dilution with ethyl acetate, mL
5.4.5.4 Determination and calculation of correction factor
Under the selected chromatographic conditions, add 2-3 μL of the standard mixed solution respectively. After the peaks of each component have been eluted, calculate the correction factors of m-dinitrobenzene, p-nitroaniline and o-nitroaniline according to the peak area of each component. The peak before m-dinitrobenzene is a low-boiling substance, and the correction factor is calculated according to m-dinitrobenzene. The peak after p-nitroaniline is a high-boiling substance, and the correction factor is calculated according to p-nitroaniline. The correction factor of each component is calculated according to formula (1): A.·W
Wherein: f.
Correction factor of a component,
-peak area of m-nitroaniline, mm2;
Peak area of component i, mm
-mass of m-nitroaniline, g;
Mass of component, 8.
5.4.5.5 Chromatogram
The oxygen phase chromatogram is shown in Figure 1.
(1)
GB/T4840.3—1999
1-Solvent;2-Low boiling substances;3-m-dinitrobenzene;4-o-nitroaniline;5-m-nitroaniline;6Figure 1
Gas chromatogram of m-nitroaniline
5.4.6Analysis steps
p-Nitroaniline;7-High boiling substances
Weigh 2 g (accurate to 0.01 g) of m-nitroaniline sample into a 10 mL brown volumetric flask and dilute to the mark with ethyl acetate. Inject the sample under the selected conditions, and after all components have finished emitting peaks, calculate the percentage of each component according to the peak area and relative correction factor according to formula (2):
X, =:A5 × 100
Where: X is the percentage of component i, %, f. is the correction factor of component i;
A is the peak area of component i, mm2
The difference between the results of two parallel determinations of the content of each organic impurity should not be greater than 0.2%, and the arithmetic mean is taken as the determination result. 6 Inspection rules
6.1 Inspection classification
All items specified in Table 1 are factory inspection items. 6.2 Factory inspection
M-nitroaniline should be inspected by the quality inspection department of the manufacturer according to the requirements of this standard, and the manufacturer should ensure that all products shipped meet the requirements of this standard. Each batch of products shipped should be accompanied by a quality certificate in a fixed format. 6.3 User Acceptance
The user has the right to inspect the received m-nitroaniline in accordance with the provisions of this standard to check whether it meets the requirements of this standard.
6.4 Re-inspection
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 cannot be accepted. 7 Marking, labeling, packaging, transportation and storage 7.1 Marking
The packaging barrels of m-nitroaniline should be clearly marked, indicating the name of the manufacturer, address, product name, trademark, batch number, grade, gross weight, net weight and production date, and in accordance with the requirements of GB190 and GB191, the word "toxic" and the icon should be marked. 7.2 Label
Each batch of packaged products should be accompanied by a label of a certain format, which includes: manufacturer name, factory address, product name, batch number, grade, net weight, production date, proof that the product quality meets the requirements of this standard and the number of this standard. 7.3 Packaging
M-Nitroaniline is packed in woven bags or iron drums lined with plastic bags (plastic bags must be tied), with a net weight of 25kg per bag (drum). If the user requires other packaging, it can be negotiated.
7.4 Transportation
During transportation, it should be protected from exposure to sunlight, collision and rain. 7.5 Storage
The product should be stored in a cool, dry and ventilated warehouse. 65%;
p-Nitroaniline: refined product (recrystallized from ethanol three times until no impurities are detected under the test conditions); o-Nitroaniline: refined product (recrystallized from ethanol three times until no impurities are detected under the test conditions); m-Dinitrobenzene: refined product (recrystallized from ethanol three times until no impurities are detected under the test conditions). 5.4.5.2 Preparation of standard stock solution
According to the requirements of Table 2, accurately weigh various reagents (accurate to 0.0002g) in a clean and dry 25mL volumetric flask, dissolve with ethyl acetate, and dilute to the scale. The shelf life of the standard stock solution is three months. Table 2 Preparation of standard stock solution
Reagent name
Weighing amount,
Volume after dilution, ml
m-dinitrobenzene
5.4.5.3 Preparation of standard mixed solution
p-Nitroaniline
o-Nitroaniline
m-Nitroaniline
In five numbered 10mL brown volumetric flasks, prepare according to Table 3 to obtain mixed solutions No. 1, 2, 3, 4, and 5. The shelf life of the standard mixed solution is one month.
Table 3 Preparation of standard mixed solution
Single standard solution
Liquid A (m-dinitrobenzene), mL
Liquid B (p-nitroaniline), mL
Liquid C (p-nitroaniline), mL
Liquid D (m-nitroaniline), mL
Total volume after dilution with ethyl acetate, mL
5.4.5.4 Determination and calculation of correction factor
Under the selected chromatographic conditions, add 2-3 μL of the standard mixed solution respectively. After the peaks of each component have been eluted, calculate the correction factors of m-dinitrobenzene, p-nitroaniline and o-nitroaniline according to the peak area of each component. The peak before m-dinitrobenzene is a low-boiling substance, and the correction factor is calculated according to m-dinitrobenzene. The peak after p-nitroaniline is a high-boiling substance, and the correction factor is calculated according to p-nitroaniline. The correction factor of each component is calculated according to formula (1): A.·W
Wherein: f.
Correction factor of a component,
-peak area of m-nitroaniline, mm2;
Peak area of component i, mm
-mass of m-nitroaniline, g;
Mass of component, 8.
5.4.5.5 Chromatogram
The oxygen phase chromatogram is shown in Figure 1.
(1)
GB/T4840.3—1999
1-Solvent;2-Low boiling substances;3-m-dinitrobenzene;4-o-nitroaniline;5-m-nitroaniline;6Figure 1
Gas chromatogram of m-nitroaniline
5.4.6Analysis steps
p-Nitroaniline;7-High boiling substances
Weigh 2 g (accurate to 0.01 g) of m-nitroaniline sample into a 10 mL brown volumetric flask and dilute to the mark with ethyl acetate. Inject the sample under the selected conditions, and after all components have finished emitting peaks, calculate the percentage of each component according to the peak area and relative correction factor according to formula (2):
X, =:A5 × 100
Where: X is the percentage of component i, %, f. is the correction factor of component i;
A is the peak area of component i, mm2
The difference between the results of two parallel determinations of the content of each organic impurity should not be greater than 0.2%, and the arithmetic mean is taken as the determination result. 6 Inspection rules
6.1 Inspection classification
All items specified in Table 1 are factory inspection items. 6.2 Factory inspection
M-nitroaniline should be inspected by the quality inspection department of the manufacturer according to the requirements of this standard, and the manufacturer should ensure that all products shipped meet the requirements of this standard. Each batch of products shipped should be accompanied by a quality certificate in a fixed format. 6.3 User Acceptance
The user has the right to inspect the received m-nitroaniline in accordance with the provisions of this standard to check whether it meets the requirements of this standard.
6.4 Re-inspection
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 cannot be accepted. 7 Marking, labeling, packaging, transportation and storage 7.1 Marking
The packaging barrels of m-nitroaniline should be clearly marked, indicating the name of the manufacturer, address, product name, trademark, batch number, grade, gross weight, net weight and production date, and in accordance with the requirements of GB190 and GB191, the word "toxic" and the icon should be marked. 7.2 Label
Each batch of packaged products should be accompanied by a label of a certain format, which includes: manufacturer name, factory address, product name, batch number, grade, net weight, production date, proof that the product quality meets the requirements of this standard and the number of this standard. 7.3 Packaging
M-Nitroaniline is packed in woven bags or iron drums lined with plastic bags (plastic bags must be tied), with a net weight of 25kg per bag (drum). If the user requires other packaging, it can be negotiated.
7.4 Transportation
During transportation, it should be protected from exposure to sunlight, collision and rain. 7.5 Storage
The product should be stored in a cool, dry and ventilated warehouse. 65%;
p-Nitroaniline: refined product (recrystallized from ethanol three times until no impurities are detected under the test conditions); o-Nitroaniline: refined product (recrystallized from ethanol three times until no impurities are detected under the test conditions); m-Dinitrobenzene: refined product (recrystallized from ethanol three times until no impurities are detected under the test conditions). 5.4.5.2 Preparation of standard stock solution
According to the requirements of Table 2, accurately weigh various reagents (accurate to 0.0002g) in a clean and dry 25mL volumetric flask, dissolve with ethyl acetate, and dilute to the scale. The shelf life of the standard stock solution is three months. Table 2 Preparation of standard stock solution
Reagent name
Weighing amount,
Volume after dilution, ml
m-dinitrobenzene
5.4.5.3 Preparation of standard mixed solution
p-Nitroaniline
o-Nitroaniline
m-Nitroaniline
In five numbered 10mL brown volumetric flasks, prepare according to Table 3 to obtain mixed solutions No. 1, 2, 3, 4, and 5. The shelf life of the standard mixed solution is one month.
Table 3 Preparation of standard mixed solution
Single standard solution
Liquid A (m-dinitrobenzene), mL
Liquid B (p-nitroaniline), mL
Liquid C (p-nitroaniline), mL
Liquid D (m-nitroaniline), mL
Total volume after dilution with ethyl acetate, mL
5.4.5.4 Determination and calculation of correction factor
Under the selected chromatographic conditions, add 2-3 μL of the standard mixed solution respectively. After the peaks of each component have been eluted, calculate the correction factors of m-dinitrobenzene, p-nitroaniline and o-nitroaniline according to the peak area of each component. The peak before m-dinitrobenzene is a low-boiling substance, and the correction factor is calculated according to m-dinitrobenzene. The peak after p-nitroaniline is a high-boiling substance, and the correction factor is calculated according to p-nitroaniline. The correction factor of each component is calculated according to formula (1): A.·W
Wherein: f.
Correction factor of a component,
-peak area of m-nitroaniline, mm2;
Peak area of component i, mm
-mass of m-nitroaniline, g;
Mass of component, 8. wwW.bzxz.Net
5.4.5.5 Chromatogram
The oxygen phase chromatogram is shown in Figure 1.
(1)
GB/T4840.3—1999
1-Solvent;2-Low boiling substances;3-m-dinitrobenzene;4-o-nitroaniline;5-m-nitroaniline;6Figure 1
Gas chromatogram of m-nitroaniline
5.4.6Analysis steps
p-Nitroaniline;7-High boiling substances
Weigh 2 g (accurate to 0.01 g) of m-nitroaniline sample into a 10 mL brown volumetric flask and dilute to the mark with ethyl acetate. Inject the sample under the selected conditions, and after all components have finished emitting peaks, calculate the percentage of each component according to the peak area and relative correction factor according to formula (2):
X, =:A5 × 100
Where: X is the percentage of component i, %, f. is the correction factor of component i;
A is the peak area of component i, mm2
The difference between the results of two parallel determinations of the content of each organic impurity should not be greater than 0.2%, and the arithmetic mean is taken as the determination result. 6 Inspection rules
6.1 Inspection classification
All items specified in Table 1 are factory inspection items. 6.2 Factory inspection
M-nitroaniline should be inspected by the quality inspection department of the manufacturer according to the requirements of this standard, and the manufacturer should ensure that all products shipped meet the requirements of this standard. Each batch of products shipped should be accompanied by a quality certificate in a fixed format. 6.3 User Acceptance
The user has the right to inspect the received m-nitroaniline in accordance with the provisions of this standard to check whether it meets the requirements of this standard.
6.4 Re-inspection
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 cannot be accepted. 7 Marking, labeling, packaging, transportation and storage 7.1 Marking
The packaging barrels of m-nitroaniline should be clearly marked, indicating the name of the manufacturer, address, product name, trademark, batch number, grade, gross weight, net weight and production date, and in accordance with the requirements of GB190 and GB191, the word "toxic" and the icon should be marked. 7.2 Label
Each batch of packaged products should be accompanied by a label of a certain format, which includes: manufacturer name, factory address, product name, batch number, grade, net weight, production date, proof that the product quality meets the requirements of this standard and the number of this standard. 7.3 Packaging
M-Nitroaniline is packed in woven bags or iron drums lined with plastic bags (plastic bags must be tied), with a net weight of 25kg per bag (drum). If the user requires other packaging, it can be negotiated.
7.4 Transportation
During transportation, it should be protected from exposure to sunlight, collision and rain. 7.5 Storage
The product should be stored in a cool, dry and ventilated warehouse. 63 User Acceptance
The user has the right to inspect the received m-nitroaniline in accordance with the provisions of this standard to check whether it meets the requirements of this standard.
6.4 Re-inspection
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 cannot be accepted. 7 Marking, labeling, packaging, transportation and storage 7.1 Marking
The packaging barrels of m-nitroaniline should be clearly marked, indicating the name of the manufacturer, address, product name, trademark, batch number, grade, gross weight, net weight and production date, and in accordance with the requirements of GB190 and GB191, the word "toxic" and the icon should be marked. 7.2 Label
Each batch of packaged products should be accompanied by a label of a certain format, which includes: manufacturer name, factory address, product name, batch number, grade, net weight, production date, proof that the product quality meets the requirements of this standard and the number of this standard. 7.3 Packaging
M-Nitroaniline is packed in woven bags or iron drums lined with plastic bags (plastic bags must be tied), with a net weight of 25kg per bag (drum). If the user requires other packaging, it can be negotiated.
7.4 Transportation
During transportation, it should be protected from exposure to sunlight, collision and rain. 7.5 Storage
The product should be stored in a cool, dry and ventilated warehouse. 63 User Acceptance
The user has the right to inspect the received m-nitroaniline in accordance with the provisions of this standard to check whether it meets the requirements of this standard.
6.4 Re-inspection
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 cannot be accepted. 7 Marking, labeling, packaging, transportation and storage 7.1 Marking
The packaging barrels of m-nitroaniline should be clearly marked, indicating the name of the manufacturer, address, product name, trademark, batch number, grade, gross weight, net weight and production date, and in accordance with the requirements of GB190 and GB191, the word "toxic" and the icon should be marked. 7.2 Label
Each batch of packaged products should be accompanied by a label of a certain format, which includes: manufacturer name, factory address, product name, batch number, grade, net weight, production date, proof that the product quality meets the requirements of this standard and the number of this standard. 7.3 Packaging
M-Nitroaniline is packed in woven bags or iron drums lined with plastic bags (plastic bags must be tied), with a net weight of 25kg per bag (drum). If the user requires other packaging, it can be negotiated.
7.4 Transportation
During transportation, it should be protected from exposure to sunlight, collision and rain. 7.5 Storage
The product should be stored in a cool, dry and ventilated warehouse. 6
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