A lightweight, liquid silicone. Used in moisturizers, conditioners, solvents, and as a delivery agent for other skin-care ingredients.
Cyclic dimethylsiloxane pentamer
|Jmol 3D image||Interactive graph
|Molar mass||370.77 g·mol−1|
|Density||0.958 g cm−3|
|Melting point||−47 °C; −53 °F; 226 K|
|Boiling point||210 °C (410 °F; 483 K)|
|17.03±0.72 ppb (23 °C)|
|Vapor pressure||20.4±1.1 Pa (25 °C)|
|Safety data sheet||External MSDS|
EU classification (DSD)
|Flash point||73 °C (163 °F; 346 K)|
Related Organosilicon compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Decamethylcyclopentasiloxane (D5) is an organosilicon compound with the formula [(CH3)2SiO]5. It is a colorless and odorless liquid that is slightly volatile. The compound is classified as a cyclomethicone. Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. It is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage. It is also used as part of silicone based personal lubricants. D5 is considered an emollient.
In Canada, among the volume used in consumer products approximately 70% were for antiperspirants and 20% for hair care products.