Cyclopentasiloxane (D5) is an organosilicon compound with the formula [(CH3)2SiO]5. Cyclopentasiloxane is described a silicon-based compound, and it’s part of a larger category called cyclomethicone. It functions primarily as an emollient, comes in a colorless and odorless liquid form, and is found in a vast array of beauty products from skincare to haircare. It doesn’t get absorbed into the skin. Rather, it evaporates quickly away from it. This property makes it a useful ingredient in cosmetic products that need to dry quickly, like antiperspirants and hair sprays.

It also has lubricating properties. This gives a slippery and silky feeling when applied to the skin and hair and allows the product to spread more easily.

Industrial UsesSpecification SheetMSDSPicturesVideo
Cyclopentasiloxane (D5) is used in hundreds of cosmetics. D5 can be found in a wide range of personal care products. Examples include:

  • Hair spray
  • Sunscreen
  • Antiperspirant
  • Deodorant
  • Hair conditioner
  • Shampoo
  • Hair detangling products
  • Waterproof mascara
  • Foundation
  • Eyeliner
  • Concealer
  • Moisturizer with SPF
  • Eye shadow
  • Hairstyling gel and lotion
  • Lipstick
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