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Cosmetic ingredient (INCI)

Cyclomethicone

Used in cosmetic products as skin conditioning, emollient, hair conditioning and solvent. Cyclomethicone is a generic name for a mixture of cyclic dimethyl polysiloxane compounds.

Prohibited in EU cosmetics

EU Cosmetics Regulation (EC) No 1223/2009, Annex II/1388.

The chemical behind this ingredient

Structure, properties, safety data and price information live on the chemical page.

Octamethylcyclotetrasiloxane chemical structure, C8H24O4Si4, CAS 556-67-2
Octamethylcyclotetrasiloxane
CAS 556-67-2C8H24O4Si4
39 suppliers
Octamethylcyclotetrasiloxane

IUPAC name: 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane

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  • Measured and computed properties
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Cyclomethicone suppliers

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Frequently asked questions

What is Cyclomethicone used for in cosmetics?

Cyclomethicone is used in cosmetic products as skin conditioning, emollient, hair conditioning and solvent. Cyclomethicone is a generic name for a mixture of cyclic dimethyl polysiloxane compounds.

Is Cyclomethicone restricted in cosmetics in the EU?

Cyclomethicone is listed in the annexes of EU Cosmetics Regulation (EC) No 1223/2009: Annex II/1388 (prohibited in eu cosmetics). Always check the full annex entry for the conditions of use.

What is the CAS number of Cyclomethicone?

Cyclomethicone is listed with CAS numbers 69430-24-6, 556-67-2, 541-02-6 and 540-97-6 and EC numbers 209-136-7, 208-764-9 and 208-762-8.

Where can I buy Cyclomethicone?

8 suppliers list Octamethylcyclotetrasiloxane on CompoundList. Compare them below or post a buy request with your grade and quantity.