... CAS No.: 556-67-2 2. Purity: >99% 3. A volatile octamethylcyclotetrasiloxane fluid Wanda Siloxane SeriesChemical Name: D4, OctamethylcyclotetrasiloxaneSynonym: Cyclic dimethylsiloxane tetramer; 2,2,4,4,6,6 ... ,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasiloxane1. Properties:Chemical Name: Octamethylcyclotetrasiloxane(D4) CAS No.:556-67-2EINECS No ... , CAS No.: 556-67-2 is ...