This document stipulates the quality requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of recycled industrial methylene chloride. This document applies to the production, inspection and sale of industrial methylene chloride that uses hazardous waste containing methylene chloride as raw material and uses a distillation process to recover and regenerate it. This product is only applicable to industrial fields such as painting, building materials, plastics, and dyes. Molecular formula: CH2CI2 Molecular weight: 84.93 (according to the 2007 international relative atomic mass)