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CYSTEINAMIDE HCL

58

Safety score · 0–100

Moderate

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

About

Cysteinamide HCL is a cosmetic ingredient. Exercise caution due to limited available safety data.

Cysteinamide HCl is the hydrochloride salt of cysteinamide, the amide of cysteine. The amide of cysteine is chemically analogous to the parent amino acid with potentially different penetration and activity profiles. Limited cosmetic toxicological data are available, and the HCl salt may cause mild irritation at higher concentrations. Not listed on EU Annex II or III.

Skin benefits

  • Reducing agent for hair disulfide bond modification
  • May support keratin protection

Known concerns

  • Limited cosmetic safety data
  • HCl salt may be irritating at high concentrations

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.