Trimethylsilyl Hydrolyzed Corn Starch
A cosmetic ingredient used as film forming, hair fixing, hair waving or straightening in skincare, haircare, and personal-care products sold in the European Union.
What is it?
Trimethylsilyl Hydrolyzed Corn Starch is Hydrolyzed Corn Starch (q.v.) (q.v.) that has been modified by reaction of the hydroxyl groups on the starch with a silane to produce trimethylsiloxy groups.
What does it do?
Trimethylsilyl Hydrolyzed Corn Starch is listed in the EU cosmetic ingredient inventory with the following declared functions:
-
Film forming
forms a thin continuous film on skin, hair, or nails — used in long-wear makeup, sunscreens, and hairsprays
-
Hair fixing
holds hair in a desired style, typically through a flexible film coating each strand
-
Hair waving or straightening
permanently changes the shape of hair through chemical reduction and re-oxidation of the hair's disulfide bonds
EU regulatory status
Trimethylsilyl Hydrolyzed Corn Starch 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 Trimethylsilyl Hydrolyzed Corn Starch?
Trimethylsilyl Hydrolyzed Corn Starch is a cosmetic ingredient catalogued in the EU CosIng database. Trimethylsilyl Hydrolyzed Corn Starch is Hydrolyzed Corn Starch (q.v.) (q.v.) that has been modified by reaction of the hydroxyl groups on the starch with a silane to produce trimethylsiloxy groups.
Is Trimethylsilyl Hydrolyzed Corn Starch allowed in cosmetics in the EU?
Yes. Trimethylsilyl Hydrolyzed Corn Starch is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Trimethylsilyl Hydrolyzed Corn Starch do in cosmetic products?
Trimethylsilyl Hydrolyzed Corn Starch is declared in the EU cosmetic ingredient inventory with these functions: film forming, hair fixing, hair waving or straightening.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 07/05/2026