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[Chemical Knowledge]：Classification of hazardous chemicals: understand the risk factor of chemicals and ensure the safety of life

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In recent years, with the rapid development of the chemical industry, the use of hazardous chemicals has gradually increased, causing a certain degree of threat to human safety and health. In order to prevent the hazards caused by improper handling, storage or use of chemicals, countries have adopted international regulations on classification, labeling and packaging, formulated corresponding laws and regulations, and implemented safety management systems for hazardous chemicals. The

of Classification Methods of Hazardous Chemicals in

1. According to the physical and chemical characteristics and degree of danger of chemicals, the symbol method and color coding method are usually used to classify hazardous chemicals in the world, while in China, the symbol method is mainly used.

1. Symbol Method

Symbol Method is a method of classifying hazardous chemicals by using patterns, colors and alphabetic characters. Symbols include 9 types of signs and "hazardous" and other risk specifiers.

2, color coding method

color coding method is through the selection and combination of colors to indicate the degree of danger of chemicals classification method. This method is not used in China, but qualified chemical transporters must be proficient in color coding.

2. risk coefficient

1. Explosion risk

explosion risk refers to the possibility of explosion under the conditions of heating, collision, vibration, friction, etc. The danger level is from 1 to 10. The higher the number, the higher the explosion danger level.

2. Combustion hazard

Combustion hazard refers to the ability of substances to burn themselves or participate in combustion, as well as the toxicity of their combustion products and the diffusion rate of smoke. The level of combustion hazard is also from level 1 to level 10, and the higher the number, the higher the combustion hazard level.

3. Toxic risk

Toxic risk refers to the degree of toxic effects of substances on humans, animals and plants. The poison risk level is also from level 1 to level 10. The higher the number, the higher the poison risk level.

3. the correct use and storage of hazardous chemicals

1, the correct use of

the correct use of hazardous chemicals is the need to pay attention to the use of chemical safety and its use effect. Chemicals should be used in strict accordance with the prescribed operating procedures, and the nature and use of the chemical should be fully understood before use.

2. Correct storage

Correct storage can avoid unnecessary accidents and safety hazards. The storage of hazardous chemicals should be placed on a stable base, well-ventilated, no fire source, and avoid direct exposure to the sun and high temperature and high humidity environment.

summary

the classification of hazardous chemicals is a necessary measure to ensure the safety of life. It is very important to establish a scientific classification system, accurately mark the risk level, and use and store chemicals rationally. When all walks of life involve the use of chemicals, they must operate in strict accordance with relevant regulations to improve safety awareness and prevent accidents.