This standard specifies the requirements, inspection rules, test methods and marking, packaging, transportation, storage and safety of methylchlorosilane azeotrope. This standard applies to the methylchlorosilane azeotrope separated through a rectification azeotropic distillation column using the methylchlorosilane mixture as raw material. Methylchlorosilane azeotrope is mainly composed of trimethylchlorosilane, methylhydrogendichlorosilane, silicon tetrachloride and other components