This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage, and safety of methyldichlorosilane. This standard applies to methyldichlorosilane purified by fractionation from mixed methylchlorosilanes produced by direct synthesis. Molecular formula: (CH3)HSiCl2 Structural formula: H | CH3-Si-Cl | Cl Relative molecular weight: 115.02 (according to the 2016 international relative atomic mass)