Polymethylsilsesquioxane
A cosmetic ingredient used as opacifying in skincare, haircare, and personal-care products sold in the European Union.
What is it?
Polymer formed by hydrolysis and condensation of methyltrimethoxysilane
What does it do?
Polymethylsilsesquioxane is listed in the EU cosmetic ingredient inventory with the following declared functions:
-
Opacifying
makes a transparent or translucent formulation opaque or pearlescent
EU regulatory status
Polymethylsilsesquioxane is allowed for use in cosmetic products in the European Union under Regulation 1223/2009. It is not subject to a specific Annex restriction at the time of writing.
Frequently asked questions
What is Polymethylsilsesquioxane?
Polymethylsilsesquioxane is a cosmetic ingredient catalogued in the EU CosIng database. Polymer formed by hydrolysis and condensation of methyltrimethoxysilane
Is Polymethylsilsesquioxane allowed in cosmetics in the EU?
Yes. Polymethylsilsesquioxane is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Polymethylsilsesquioxane do in cosmetic products?
Polymethylsilsesquioxane is declared in the EU cosmetic ingredient inventory with these functions: opacifying.
What is the CAS number of Polymethylsilsesquioxane?
The CAS (Chemical Abstracts Service) number for Polymethylsilsesquioxane is 68554-70-1.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 15/10/2010