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Emulsifier

OCTADECENEDIOIC ACID

CAS 20701-68-2 Updated
80

Safety score · 0–100

Good

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

About

A C18 unsaturated dicarboxylic acid used as an emulsifier and brightening adjunct in serums. Class-similar to azelaic acid but longer chain; well tolerated and increasingly common in tone-evening products.

Function

SURFACTANT - EMULSIFYING

Skin benefits

  • Emulsion stabilization
  • Brightening / tone-evening
  • Pore appearance support
  • Compatible with niacinamide and AHAs

Known concerns

  • Limited clinical dossier
  • Mild irritation at very high %

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 — always read the physical product label and consult a healthcare professional for personal concerns.