Database/Emollient/Cyclohexasiloxane
100% petroleum · ISO 16128

Is Cyclohexasiloxane natural?

No. Cyclic dimethyl siloxane (D6); classed 0.0 under site silicone convention.

INCI nameCyclohexasiloxane
CAS540-97-6
FormulaC12H36O6Si6 · 444.92 Da
FunctionEmollient · Hair Conditioning
FeedstockManufactured from silicon metal via the Muller-Rochow process…

How we scored it

Silicone; this site's convention sets all silicones to 0.0 regardless of Si-O mineral origin.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.

Where it comes from

Manufactured from silicon metal via the Muller-Rochow process into cyclic dimethylsiloxanes. This site's convention scores all silicones 0.0 regardless of the mineral origin of silicon.

In plain English

A lightweight silicone that gives a silky, non-greasy feel in lotions and hair products, then evaporates off the skin. Manufactured from silicon metal in an industrial process. Classed here as non-renewable by this site's convention.

CosIng definition: Cyclohexasiloxane is the cyclic dimethyl polysiloxane that conforms to the formula, where n equals 6, and the other components of cyclomethicone (where n equals 4, 5, or 7) are present at levels of less than 1%.

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Structure

2D structure of Cyclohexasiloxane

2,2,4,4,6,6,8,8,10,10,12,12-dodecamethyl-1,3,5,7,9,11-hexaoxa-2,4,6,8,10,12-hexasilacyclododecane

PubChem CID 10911 ↗

References

  1. 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
  2. 2Cyclohexasiloxane. PubChem CID 10911. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CYCLOHEXASILOXANE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CYCLOHEXASILOXANE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CYCLOHEXASILOXANE