Cyclomethicone

INCI: Cyclopentasiloxane

Volatile silicone that evaporates quickly from the skin surface, leaving a smooth, non-greasy film. Used as a solvent and carrier for active ingredients.

Moisturizing

Evidence by route

Topical application

Very weak or conflicting data.

A formulation aid. CIR confirmed safety in cosmetic use. The EU restricted D4 (cyclotetrasiloxane) for environmental reasons, but D5 (cyclopentasiloxane) remains permitted.

Cosmetic Ingredient Review. Int J Toxicol. 2011;30(Suppl 5):149S-227S.

Tolerability and safety

Irritation potential

Low

Allergen risk

Low

Pregnancy

Safe

Skin types

Suitable for

OilyCombinationNormal

Frequently asked questions

Is Cyclomethicone safe during pregnancy?

Cyclomethicone is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.

What skin types is Cyclomethicone for?

Cyclomethicone suits: oily, combination, normal.