This standard specifies the quality control requirements for chlorobenzene, including safety information, sampling, test methods, inspection rules, marking, labeling, Encasement, transportation and storage. The molecular formula for chlorobenzene is C H Cl, the relative molecular weight is 112.56 (according to the 2011 International Relative Atomic Mass), and the CAS number is 108-90-7. This standard applies to the mass management of chlorobenzene products to ensure that they comply with relevant safety and technical specifications. Normative reference documents cover the Encasement marking of dangerous goods, general rules for sampling chemical products, specifications and test methods for analytical laboratory water, etc., to ensure the safe use and quality control of chlorobenzene.