Database/Emollient/Stearyl Methicone
100% petroleum · ISO 16128

Is Stearyl Methicone natural?

No. Classified as a silicone; site policy assigns silicones 0.0 even where a fatty group is attached.

INCI nameStearyl Methicone
FunctionEmollient · Skin Conditioning
FeedstockManufactured by attaching a fatty octadecyl group to…

How we scored it

Explicitly a silicone/siloxane (methyl octadecyl, trimethylsilyl-terminated) per CosIng description; this site's convention scores all silicones 0.0 despite the fatty octadecyl substituent.
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 attaching a fatty octadecyl group to a synthetic silicone backbone. The silicone portion has no natural-origin route by this site's convention.

In plain English

A silicone with a fatty side chain, used as a skin- and hair-conditioning emollient. Classed as a silicone, so it scores 0% natural by this site's convention.

CosIng definition: Silicones and siloxanes, methyl octadecyl, trimethylsilyl terminated

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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. 2STEARYL METHICONE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3STEARYL METHICONE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=STEARYL%20METHICONE