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pH Adjuster

3-HYDROXYPROPIONIC ACID

CAS 503-66-2 Updated
72

Safety score · 0–100

Fine

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

About

A small bio-derived hydroxy acid (3-HP) that gently exfoliates and adjusts pH. Generally considered low-risk at cosmetic levels, though can sting at high concentrations on sensitive skin.

Function

SKIN CONDITIONING - MISCELLANEOUS

Skin benefits

  • Mild exfoliating effect
  • Helps adjust formula pH
  • Bio-based, biodegradable

Known concerns

  • Mild irritation possible at higher concentrations
  • Less safety data than canonical AHAs

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.