Hair Conditioning
LAURDIMONIUM HYDROXYPROPYL RICE STARCH
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A cationic-modified rice starch (lauryl-quat hydroxypropyl ether). Soft conditioning film for hair and skin; mild eye-irritation caveat.
Laurdimonium hydroxypropyl rice starch is rice starch chemically modified with hydroxypropyl groups bearing a lauryl-dimethylammonium (cationic) head group. The cationic charge gives it conditioning affinity to hair and skin, while the starch backbone delivers a soft, powdery skin feel and modest film-forming function. It is used in dry shampoos, conditioners, and color cosmetics. CIR has reviewed similar quat-modified starches as safe at typical concentrations; quaternary ammonium fragments can be mildly eye-irritating, especially at higher levels. No CMR or endocrine concerns identified.
Function
Skin benefits
- Conditions hair and skin
- Reduces tack and improves texture
- Acts as soft film former
Known concerns
- Possible mild eye irritation
- Cationic surfactants can sensitize at high levels
- Limited compound-specific data
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
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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.