Emollient
BUTYRUM
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Plain dairy butter — the natural milkfat from cow's milk used as a rich, soothing emollient. Animal-derived; possible dairy-allergen risk.
Butyrum (CAS 8029-34-3) is the INCI name for cow's-milk butter, the natural milkfat fraction with a long history of cosmetic and traditional skincare use. The lipid composition is dominated by saturated fatty acids (palmitic, stearic, myristic) plus oleic acid, with small amounts of short-chain butyric acid that contribute to its characteristic odor. It functions as a rich, occlusive emollient suited to dry-skin formulas. No CMR, endocrine, or GHS hazards; the main caveats are dairy-allergen cross-reactivity for sensitized users, animal sourcing (not vegan), and oxidative rancidity requiring antioxidant protection. Limited standardized cosmetic-clinical data.
Function
Skin benefits
- Rich emollience for dry skin
- Provides occlusive moisture-lock
- Source of natural fatty acids
Known concerns
- Animal-derived
- Possible dairy-allergen cross-reactivity
- Oxidative rancidity risk
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related emollients
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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.