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pH adjuster

DIISOPROPANOLAMINE

CAS 110-97-4
60

Safety score · 0–100

Fine

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

Diisopropanolamine is an alkanolamine used as a pH adjuster and buffer in cosmetics. It neutralizes acidic ingredients in lotions, hair dyes and cleansers and must be formulated without nitrosating agents.

Function

BUFFERING

Skin benefits

  • Effective pH adjuster in skincare and hair care formulations
  • Acts as a buffering agent to keep products skin-compatible
  • Helps neutralize acidic actives like fatty acids in emulsions
  • CIR-reviewed and considered safe at typical concentrations

Known concerns

  • Must not be combined with nitrosating agents to avoid nitrosamine formation
  • Can be mildly irritating at higher concentrations
  • Like related alkanolamines it raises consumer concerns despite safe profile

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.