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CAS:  541-02-6

INCI: Cyclotetrasiloxane, cyclopentasiloxane

Chemical Structure:

  • Cyclomethicone is a type of silicone, specifically a cyclic silicone compound.
  • It is typically a mixture of various cyclic dimethylsiloxane molecules.

Physical Form:

  • Cyclomethicone is a clear, colorless liquid.


  1. Volatile Nature: Cyclomethicone is a volatile silicone, meaning it evaporates quickly upon application.
  2. Low Viscosity: It has a low viscosity, giving it a light and silky texture.
  3. Odorless: Cyclomethicone is generally odorless.
  4. Non-Greasy Feel: It imparts a smooth, non-greasy feel to the skin.

Function in Formulations:

  1. Carrier and Solvent: Cyclomethicone is often used as a carrier for other ingredients, helping to deliver them to the skin.
  2. Emollient: It provides a silky and smooth feel, enhancing the texture of skincare and cosmetic products.
  3. Spreadability: Cyclomethicone improves the spreadability of formulations, making them easy to apply.
  4. Quick Evaporation: Its quick evaporation leaves a dry, non-greasy finish on the skin.

Common Applications:

  • Cyclomethicone is used in a variety of personal care and cosmetic products, including skincare, hair care, and makeup formulations.

Common Products:

  • Moisturizers, serums, hair conditioners, hair styling products, sunscreens, and makeup products often contain cyclomethicone.


  1. Enhanced Texture: It imparts a luxurious and smooth texture to formulations.
  2. Quick Absorption: Products containing cyclomethicone are known for their quick absorption and non-greasy feel.
  3. Improved Spreadability: It helps in spreading products evenly over the skin or hair.


  • Cyclomethicone is generally considered safe for cosmetic use, but individuals with silicone sensitivities should be cautious.

Regulatory Status:

  • Cyclomethicone is widely used in the cosmetic industry and is considered safe for use in personal care products when formulated according to regulatory guidelines.

Material Safety Data Sheet

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