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Hair Colorant

HYDROXYSUCCINIMIDYL C10-40 ISOALKYL ACIDATE

55

Safety score · 0–100

Moderate

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

A reactive NHS-ester surfactant used in permanent hair dyes and perms to bond colorants to hair keratin. The reactive ester chemistry brings real sensitisation potential, hence the cautious tier.

Function

CLEANSINGSURFACTANT - EMULSIFYINGHAIR CONDITIONINGHAIR WAVING OR STRAIGHTENINGSURFACTANT - CLEANSING

Skin benefits

  • Bonds colorants to hair proteins
  • Useful in permanent hair dyes
  • Improves wear of hair-color products

Known concerns

  • NHS-ester reactivity can cause skin sensitisation
  • Used in permanent dyes/perm products with known irritation potential
  • Limited independent dermal 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, so always read the physical product label and consult a healthcare professional for personal concerns.