Other
HYDROXYPROPYLTRIMONIUM HYDROLYZED KERATIN
Safety score · 0–100
Excellent
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A cationic hydrolyzed keratin derivative with a permanent positive charge that binds to damaged hair and skin proteins, providing repair, conditioning, and film-forming benefits.
Hydroxypropyltrimonium Hydrolyzed Keratin is prepared by partial hydrolysis of keratin (typically sourced from feathers or wool) followed by chemical modification with hydroxypropyltrimethylammonium groups. The hydrolysis reduces keratin's high molecular weight to fragments capable of penetrating the hair cuticle and skin surface, while the quaternary ammonium group ensures substantive binding to negatively charged protein surfaces. The ingredient is classified as a skin and hair conditioning agent. It is not listed in EU Annex II or III. Keratin hydrolysates are widely used in hair repair and skin care products with an established safety profile, though the cationic modification is a more recent cosmetic development compared to unmodified hydrolyzed keratin.
Skin benefits
- Penetrates and repairs damaged hair cuticle
- Film-forming moisture barrier on skin
- Reduces breakage and improves hair strength
- Smooths and conditions skin and hair surfaces
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related others
Check your shelf
Find HYDROXYPROPYLTRIMONIUM HYDROLYZED KERATIN in your products.
Scan any cosmetic product with LuxSense to see if it contains HYDROXYPROPYLTRIMONIUM HYDROLYZED KERATIN and get a full ingredient breakdown with safety scores.
This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.