Database/Emollient/Bis-Stearyl Dimethicone
100% petroleum · ISO 16128

Is Bis-Stearyl Dimethicone natural?

No. Silicones score 0.0 by this site's convention, so the siloxane backbone and the stearyl end caps are all counted as non-natural.

INCI nameBis-Stearyl Dimethicone
FunctionEmollient · Film Forming
FeedstockMade by hydrosilylation of 1-octadecene (an alpha-olefin) onto…

How we scored it

Silicone (dimethyl siloxane chain with octadecyl end groups): this site's convention scores all silicones 0.0, whatever the fatty side chains; 0 / total = 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-octadecene (an alpha-olefin) onto a hydride-terminated dimethicone built from silicon metal and methyl chloride. No natural-origin route is commercially significant.

In plain English

A waxy silicone that softens skin, forms a light film and adds a smooth feel to creams and sticks. It is a dimethicone chain capped at both ends with stearyl (18-carbon) groups.

CosIng definition: Silicones and siloxanes, dimethyl, octadecyl 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. 2BIS-STEARYL DIMETHICONE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3BIS-STEARYL DIMETHICONE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=BIS-STEARYL%20DIMETHICONE