This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of decamethylcyclopentasiloxane. This standard applies to dimethylsiloxane mixed rings prepared by hydrochloric acid hydrolysis and pyrolysis using dimethyldichlorosilane as raw material. Dimethylsiloxane mixed rings are distilled to obtain decamethylcyclopentasiloxane. Oxane.