... 1. 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 ... and Appearance:Colorless clear oily liquid2. Applications:D4, Octamethylcyclotetrasiloxane, CAS No.: 556-67-2 is a base fluid in a number of personal ...