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Hair Conditioning

POLYHYDROXYSTEARAMIDOPROPYL DIMETHYLAMINE

CAS -
65

Safety score · 0–100

Fine

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

About

A polyhydroxystearic-acid-based amidoamine hair conditioner. Complex cationic conditioner — class-typical nitrosamine caveats.

Polyhydroxystearamidopropyl dimethylamine is an amidoamine formed from polyhydroxystearic acid (a condensation polymer of 12-hydroxystearic acid) reacted with dimethylaminopropylamine. It is part of the amidopropyl dimethylamine hair-conditioner family. The polyhydroxystearic backbone adds a more polymeric, emollient character compared with simple C16/C18 amidoamines. Close analogs (stearamido-, behenamido-) are CIR-reviewed and considered safe as used; this specific polyhydroxy version has thin independent literature. Tertiary-amine nitrosamine avoidance rules apply.

Function

SURFACTANT - CLEANSING

Skin benefits

  • Hair conditioner with rich emollient feel
  • Cationic in acidic formula — binds damaged hair
  • Derived from polyhydroxystearic acid, a known cosmetic material

Known concerns

  • Tertiary amine — nitrosamine concern if combined with nitrosating agents
  • Complex, less-studied variant of the amidoamine class
  • Limited independent safety data

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.