This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation and storage of dimethyldichlorosilane hydrolyzate. This standard applies to dimethyldichlorosilane hydrolyzate prepared from dimethyldichlorosilane as raw material through hydrolysis, acid separation, water removal and other processes. This product is mainly used as raw material for silicone oil and silicone rubber.