Thickener
STEARALKONIUM BENTONITE
Safety score · 0–100
Good
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Stearalkonium bentonite — bentonite clay surface-modified with a stearalkonium quat to make it oil-dispersible. Thickens lipsticks, foundations and oil gels, and keeps pigments in suspension. Well-tolerated cosmetic workhorse.
Skin benefits
- Thickens oil-phase formulations and gels
- Prevents pigment settling in lipsticks and foundations
- Stable rheology modifier with good shelf life
Known concerns
- Quaternary ammonium portion can carry mild irritation potential
- Not typical for leave-on application to sensitive eye area
- Limited public-domain CIR review for this specific ingredient
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related thickeners
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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.