This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. for industrial methyl chloride. This standard applies to methyl chloride produced by methane thermal chlorination, methanol hydrochlorination or pesticide by-product recovery. This product is mainly used as a raw material in organic synthesis such as organosilicon compounds and cellulose ethers, and can also be used as a solvent for organic compounds. Molecular formula: CH|(3)Cl Relative molecular mass: 50.49 (according to the 1997 international relative atomic mass)