This document specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage, and safety of methylvinyldichlorosilane. This document applies to methylvinyldichlorosilane produced by the fractionation of crude monomer of methylvinyldichlorosilane produced by the addition method of methylhydrogendichlorosilane and acetylene. Molecular formula: C3H6SiCl2 Relative molecular weight: 141.05 (according to 2014 international relative atomic mass)