Trimethylpentyl Polysilsesquioxane
A cosmetic ingredient used as nail conditioning in skincare, haircare, and personal-care products sold in the European Union.
What is it?
Trimethylpentyl Polysilsesquioxane is a resinous material composed of a mixture of three-dimensional siloxane polymers and oligomers with cage structures. For the oligomers, each silicon atom in the polysilsesquioxane is connected via oxygen atoms to three other silicon atoms and can be represented by the empirical formulation RSiO3/2 where R represents the trimethylpentyl group. For the larger polymeric polysilsesquioxanes, some of the silicon atoms are not connected to other silicon atoms and instead have a silanol (SiOH) group. Trimethylpentyl Polysilsesquioxane is prepared by the hydrolysis and condensation of 2,4,4-trimethylpentyl trimethoxysilane
What does it do?
Trimethylpentyl Polysilsesquioxane is listed in the EU cosmetic ingredient inventory with the following declared functions:
-
Nail conditioning
improves the appearance, feel, or condition of fingernails and toenails
EU regulatory status
Trimethylpentyl Polysilsesquioxane 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 Trimethylpentyl Polysilsesquioxane?
Trimethylpentyl Polysilsesquioxane is a cosmetic ingredient catalogued in the EU CosIng database. Trimethylpentyl Polysilsesquioxane is a resinous material composed of a mixture of three-dimensional siloxane polymers and oligomers with cage structures. For the oligomers, each silicon atom in the polysilsesquioxane is connected via oxygen atoms to three other silicon atoms and can be represented by the empirical formulation RSiO3/2 where R represents the trimethylpentyl group. For the larger polymeric polysilsesquioxanes, some of the silicon atoms are not connected to other silicon atoms and instead have a silanol (SiOH) group. Trimethylpentyl Polysilsesquioxane is prepared by the hydrolysis and condensation of 2,4,4-trimethylpentyl trimethoxysilane
Is Trimethylpentyl Polysilsesquioxane allowed in cosmetics in the EU?
Yes. Trimethylpentyl Polysilsesquioxane is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Trimethylpentyl Polysilsesquioxane do in cosmetic products?
Trimethylpentyl Polysilsesquioxane is declared in the EU cosmetic ingredient inventory with these functions: nail conditioning.
What is the CAS number of Trimethylpentyl Polysilsesquioxane?
The CAS (Chemical Abstracts Service) number for Trimethylpentyl Polysilsesquioxane is 190732-67-3, 444619-08-3.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 09/03/2016