The material selection platform
Cosmetics Ingredients
The material selection platform
Cosmetics Ingredients


CAS Number 541-02-6
Chem/IUPAC Name: Decamethylcyclopentasiloxane
EINECS/ELINCS No: 208-764-9
COSING REF No: 75413
Cyclopentasiloxane is a staple ingredient used in cosmetics. The chemical formula for Cyclopentasiloxane is C10H30O5Si5. It is a non-greasy silicone that is colorless, odorless, and water-thin. It gets quickly evaporated from the skin rather than getting absorbed - making it a brilliant ingredient to be used in products that need to dry fast, like antiperspirants and hair sprays. Further, it also has lubricating properties and feels silky smooth when applied to hair and skin.


Because of its many enriching properties, Cyclopentasiloxane silicone is a common ingredient used in a variety of hair and skin care products. It helps the products spread more evenly and dry quickly, thus providing all the benefits without weighing the skin or hair down. It also gives cosmetic products a silky texture.
  • Skin care: The hydrating properties of Cyclopentasiloxane are great for the skin as it traps moisture, making the skin smooth and soft. It is used in lightweight products as it does not penetrate the skin but rather evaporates quickly. Further, Cyclopentasiloxane skin care has anti-aging properties and is a great ingredient to be used in lotions
  • Hair care: It is a great conditioner for hair because of its lubricating properties. It is commonly used in shampoos, hair conditioners, hair sprays, anti-frizz, and hair detangling products. It forms a layer on the hair, protecting and preventing it from damage while also allowing the product to spread easily and evenly
  • Cosmetic products: It is used in makeup and makeup removers because it is non-comedogenic and does not block pores


Cyclopentasiloxane, a synthetic substance, is made up of silicone and oxygen. Sometimes, elements like hydrogen and carbon are also used. They are all natural substances, but Cyclopentasiloxane undergoes chemical processing before it is used in cosmetic and skincare products.

What does CYCLOPENTASILOXANE do in a formulation?

  • Emollient
  • Hair conditioning
  • Skin conditioning


Cyclopentasiloxane is a safe ingredient and has no known side effects. However, a patch test is recommended before use in case of very sensitive and allergic skin. Even if accidentally inhaled, this ingredient is excreted out and does not accumulate in the body to cause any danger. Moreover, Cyclopentasiloxane is environmentally friendly and halal. It is a common misconception that Cyclopentasiloxane clogs pores, but this ingredient is non-comedogenic as it does not enter the pores and evaporates quickly.



Property Values
Boiling Point 210°C
Melting Point -38°C
Solubility Soluble in water
Viscosity 3.74 cP

Commercial Selection : Grades containing solely CYCLOPENTASILOXANE

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