Database/Skin Conditioning/Caprylyl Trisiloxane
100% petroleum · ISO 16128

Is Caprylyl Trisiloxane natural?

No. Siloxane backbone and methyl groups come from silicon metal and methyl chloride and the octyl group from 1-octene; all silicones score 0.0 by this site's convention.

INCI nameCaprylyl Trisiloxane
CAS17955-88-3
FormulaC15H38O2Si3 · 334.72 Da
FunctionSkin Conditioning
FeedstockMade by hydrosilylation of 1-octene onto heptamethyltrisiloxane, which…

How we scored it

Silicone (C15H38O2Si3, 334.7 Da): this site's convention scores all silicones 0.0, including the octyl side chain; natural mass credited 0; 0 / 334.7 = 0.0.
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

Made by hydrosilylation of 1-octene onto heptamethyltrisiloxane, which comes from silicon metal and methyl chloride. No natural-origin route is commercially significant.

In plain English

A lightweight, fast-spreading silicone used to make products feel silky and spread easily. It is built from silicon, oxygen and methyl groups with one eight-carbon chain.

CosIng definition: Caprylyl Trisiloxane is the organic compound that conforms to the formula:

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Structure

2D structure of Caprylyl Trisiloxane

trimethyl-(methyl-octyl-trimethylsilyloxysilyl)oxysilane

PubChem CID 87373 ↗

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. 2Caprylyl Trisiloxane. PubChem CID 87373. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CAPRYLYL TRISILOXANE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CAPRYLYL TRISILOXANE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CAPRYLYL%20TRISILOXANE