Database/Antifoaming/Trimethylsiloxysilicate
100% petroleum · ISO 16128

Is Trimethylsiloxysilicate natural?

No. A silicone resin, scored 0.0 under the site's fixed convention that all silicone materials are non-natural.

INCI nameTrimethylsiloxysilicate
FormulaC6H18O5Si3 · 254.46 Da
FunctionAntifoaming · Emollient
FeedstockManufactured by reacting silica with trimethylsilane-type reagents to…

How we scored it

Silicone resin (MQ resin) from silica + trimethylsilane; this site's convention scores all silicones 0.0 despite the mineral-derived Si-O backbone; 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

Manufactured by reacting silica with trimethylsilane-type reagents to build a branched siloxane (MQ) resin. Although the Si-O backbone starts from mineral silica, the site classes all silicones as non-natural.

In plain English

A silicone resin made by reacting silica with a silicone-forming chemical. Gives a smooth, non-greasy feel, reduces foaming, and leaves a light film on skin or hair.

CosIng definition: Silica, reaction products with trimethylsilane

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Structure

2D structure of Trimethylsiloxysilicate

trimethyl-[oxo(trimethylsilylperoxy)silyl]peroxysilane

PubChem CID 87094716 ↗

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. 2Trimethylsiloxysilicate. PubChem CID 87094716. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3TRIMETHYLSILOXYSILICATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4TRIMETHYLSILOXYSILICATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=TRIMETHYLSILOXYSILICATE