Decamethylcyclopentasiloxane
chemical compound
Decamethylcyclopentasiloxane, also known as D5 and D5, is an organosilicon compound with the formula [(CH3)2SiO]5. It is a colorless and odorless liquid that is slightly volatile. It is used in various cosmetic products. It also is used as a dry cleaning solvent and has been marketed as an "eco-friendly" and "green" alternative to perchloroethylene in the 2000s, under the tradename GreenEarth. Decamethylcyclopentasiloxane is persistent in nature and bioaccumulative. Decamethylcyclopentasiloxane is acutely non-toxic but its long-term health effects are unknown.
Use
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.
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