Surfactant
CALCIUM BETA-SITOSTERYL SULFATE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A plant-sterol sulfate — a niche mild surfactant derived from beta-sitosterol. Sulfated sterol structure means it cleanses gently while staying skin-compatible.
Calcium beta-sitosteryl sulfate is the calcium salt of the sulfate ester of beta-sitosterol, a common plant phytosterol. It functions as a mild surfactant/emulsifier that leverages the skin-compatible sterol core rather than a harsher alkyl sulfate. Published cosmetic-toxicology dossiers are limited and there is no CIR monograph specifically for this ingredient; analogues (cholesteryl sulfate) are well characterised and integral to skin-barrier biology. Not restricted under EU CosIng.
Skin benefits
- Plant-sterol-based surfactant
- Skin-barrier compatible sterol component
- Mild cleansing action
Known concerns
- Limited independent safety data
- Sulfated surfactants can still mildly defat skin
- Supplier-dependent impurity profile
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related surfactants
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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.