Thiohistidine
A cosmetic ingredient used as antioxidant, bleaching, chelating in skincare, haircare, and personal-care products sold in the European Union.
What is it?
1H-Imidazole-4-propanoic acid,α-amino-2,3-dihydro-2-thioxo; (S)-α-amino-2,3-dihydro-2-thioxo-1H-imidazole-4-propionic acid
What does it do?
Thiohistidine is listed in the EU cosmetic ingredient inventory with the following declared functions:
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Antioxidant
neutralises free radicals to slow oxidative damage to the formulation or skin
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Bleaching
lightens hair or skin tone by chemically reducing pigment
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Chelating
binds metal ions to prevent them from interfering with formulation stability
EU regulatory status
Thiohistidine 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 Thiohistidine?
Thiohistidine is a cosmetic ingredient catalogued in the EU CosIng database. 1H-Imidazole-4-propanoic acid,α-amino-2,3-dihydro-2-thioxo; (S)-α-amino-2,3-dihydro-2-thioxo-1H-imidazole-4-propionic acid
Is Thiohistidine allowed in cosmetics in the EU?
Yes. Thiohistidine is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Thiohistidine do in cosmetic products?
Thiohistidine is declared in the EU cosmetic ingredient inventory with these functions: antioxidant, bleaching, chelating.
What is the CAS number of Thiohistidine?
The CAS (Chemical Abstracts Service) number for Thiohistidine is 2002-22-4.
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