Other
HYDROXYPROPYL BISSTEARYLDIMONIUM CHLORIDE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Hydroxypropyl Bisstearyldimonium Chloride is a cosmetic ingredient used in product formulations. Its specific function may vary between products. Exercise caution due to limited available safety data.
This quaternary ammonium compound (quat) features two stearyl chains (C18) and a hydroxypropyl substituent that enhances moisturization compared to standard dialkyl quats. The bis-stearyl structure provides superior substantivity to negatively charged hair and skin surfaces, forming hydrophobic conditioning films that reduce combing force and enhance sheen. EU CosIng lists this substance with no restrictions under Regulation (EC) No 1223/2009. While quaternary ammonium compounds can be eye irritants at high concentrations, the bis-stearyl variant is considered low irritation at typical use levels (0.1–5%).
Skin benefits
- Provides durable hair conditioning and detangling
- Hydrophobic film reduces water absorption and frizz
- Improves sheen and tactile smoothness of skin and hair
Known concerns
- Eye irritation possible at high concentrations (>5%)
- Can contribute to build-up on hair with repeated use
- Mild skin irritation reported in very sensitive individuals at high use levels
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related others
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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.