It is a volatile polydimethylcyclosiloxane, mainly composed of octamethylcyclotetrasiloxane; it is polymerized into an organosilicon polymer under acid-base catalysis, which is the basic raw material of silicone oil and silicone rubber. It can be directly used as rubber filler treatment agent and cosmetic raw material. CAS Number:556-67-2 Melting Point: 17-18 Boiling Point:175-176 Flash point: 60 Relative Density :0.956 Application: D4 is the most important ring body in DMC (PMX0244). This product is colorless, insoluble in water, soluble in organic solvents. 1.The basic raw material of silicone oil , silicone emulsion, silicone rubber, silicone resin and other organic silicone products. 2. Raw material of cosmetics and medicine and daily necessities, Skin Care Creams & lotions, Sun Care Products, Shampoo & Bath oil Antiperspirants & Deodorants