Cosmetic ingredient dictionary
Polymethylsilsesquioxane in cosmetics: what it is and what it does
Polymethylsilsesquioxane is a cosmetic ingredient that makes a clear product cloudy. Open Beauty Facts finds it in 73 products, most often sunscreen.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Polymethylsilsesquioxane do in a product?
In a cosmetic product, Polymethylsilsesquioxane makes a clear product cloudy. The EU’s CosIng database lists this job for it: opacifying.
What other names and numbers does Polymethylsilsesquioxane have?
- CAS number
- 68554-70-1
- CosIng reference
- 79017
Which products contain Polymethylsilsesquioxane?
Open Beauty Facts finds Polymethylsilsesquioxane in the ingredient lists of 73 of the 22,021 products it has a list for, most often sunscreen, face makeup and anti-wrinkle creams.
Products with it, by country of sale: France 17 · United States 9 · Norway 7 · Canada 6.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Polymethylsilsesquioxane turns up, not how much of the market it is.
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’.
- European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
- 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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