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Cosmetic ingredient dictionary

Stearoxytrimethylsilane in cosmetics: what it is and what it does

Stearoxytrimethylsilane is a cosmetic ingredient that softens and smooths the skin. Open Beauty Facts finds it in 5 products, most often anti-ageing face care.

By Bravoora teamUpdated Sources checked 2 sourcesHow we check

What does Stearoxytrimethylsilane do in a product?

In a cosmetic product, Stearoxytrimethylsilane softens and smooths the skin, and keeps the skin in good condition. The EU’s CosIng database lists these jobs for it: emollient and skin conditioning.

emollientskin conditioning

What other names and numbers does Stearoxytrimethylsilane have?

CAS number
18748-98-6
EC number
242-554-8
CosIng reference
38305

Which products contain Stearoxytrimethylsilane?

Open Beauty Facts finds Stearoxytrimethylsilane in the ingredient lists of 5 of the 22,021 products it has a list for, most often anti-ageing face care, anti-wrinkle creams and sunscreen.

  • Anti-ageing face care1
  • Anti-wrinkle creams1
  • Sunscreen1

Products with it, by country of sale: United States 2 · France 1 · United Kingdom 1 · Canada 1.

Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Stearoxytrimethylsilane turns up, not how much of the market it is.

On these listsEmollients

Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dermatologists, dietitians and doctors

Sources

The job, the description and the EU annex entry are CosIng’s; the fragrance allergens are the EU Annex III names Bravoora’s label checker reads; the product counts are Open Beauty Facts’.

  1. European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
  2. Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL

Contains information from Open Beauty Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check

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