Trimethylsiloxy/polymethylsilsesquioxane
A cosmetic ingredient used as anticaking, binding, skin conditioning in skincare, haircare, and personal-care products sold in the European Union.
What is it?
Trimethylsiloxy/Polymethylsilsesquioxane is the product formed by the hydrolysis and subsequent condensation of Methyltrimethoxysilane and methoxytrimethylsiliane.
What does it do?
Trimethylsiloxy/polymethylsilsesquioxane is listed in the EU cosmetic ingredient inventory with the following declared functions:
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Anticaking
prevents powders from clumping or caking, keeping them free-flowing
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Binding
holds the components of a formulation together, especially in pressed powders and compact makeup
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Skin conditioning
improves the appearance, feel, and condition of skin
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Skin conditioning - emollient
softens the skin by reducing roughness and friction between skin cells
EU regulatory status
Trimethylsiloxy/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 Trimethylsiloxy/polymethylsilsesquioxane?
Trimethylsiloxy/polymethylsilsesquioxane is a cosmetic ingredient catalogued in the EU CosIng database. Trimethylsiloxy/Polymethylsilsesquioxane is the product formed by the hydrolysis and subsequent condensation of Methyltrimethoxysilane and methoxytrimethylsiliane.
Is Trimethylsiloxy/polymethylsilsesquioxane allowed in cosmetics in the EU?
Yes. Trimethylsiloxy/polymethylsilsesquioxane is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Trimethylsiloxy/polymethylsilsesquioxane do in cosmetic products?
Trimethylsiloxy/polymethylsilsesquioxane is declared in the EU cosmetic ingredient inventory with these functions: anticaking, binding, skin conditioning, skin conditioning - emollient.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 25/04/2019