D4, Octamethylcyclotetrasiloxane 1. CAS No.: 556-67-2 2. Purity: >99% 3. A volatile octamethylcyclotetrasiloxane fluid ... 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 ... 25]:1.3968Purity:>=99% Color and Appearance:Colorless clear oily liquid2. Applications:D4, Octamethylcyclotetrasiloxane, CAS No.: 556-67- ...