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Emollient

BUTYRUM

CAS 8029-34-3
65

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

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 CONDITIONING - EMOLLIENT

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

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.