Exfoliant
CONCHIOLIN POWDER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Pearl-shell powder — the crushed organic-and-calcium matrix of mollusc shells, valued for its fine mineral texture and heritage luxury positioning.
Conchiolin powder (CAS 11028-72-1) is milled material from the conchiolin scleroprotein matrix of mollusc shells, particularly pearl oysters. It consists of an insoluble protein framework interwoven with calcium carbonate aragonite platelets. In cosmetics it is used as a mild mechanical exfoliant, soft-focus powder, and bulking agent, and is a mainstay of traditional luxury Asian skincare. No CIR or SCCS opinion specific to conchiolin exists; safety is extrapolated from related calcium-carbonate and marine-protein ingredients. The main caveats are animal origin (shellfish allergy is a rare but real concern) and sustainability. No GHS classification, no EU restrictions.
Function
Skin benefits
- Natural peptide/calcium matrix from mollusc shell
- Mild exfoliant and luminosity enhancer
- Adds calcium and trace minerals
- Traditional Asian luxury-beauty ingredient
Known concerns
- Shellfish origin — cross-reactivity for shellfish-allergic users
- Sustainability depends on pearl-farming practices
- Efficacy claims largely supplier-led
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related exfoliants
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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.