Common dangerous chemicals include benzene, liquefied gas, formaldehyde, sulfur dioxide, etc. In Article 3 of the Regulations on the Safety Administration of Hazardous Chemicals, the term "hazardous chemicals" as mentioned in these Regulations refers to highly toxic chemicals and chemicals that are toxic, corrosive, explosive, burning, combustion supporting, etc. and are harmful to human beings, facilities, and the environment. The standard (GB13690-1992) classifies commonly used hazardous chemicals according to their main hazardous characteristics, and stipulates the packaging marks of hazardous materials. The 997
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