QUATERNIUM-18

75

Good

CAS Number: 61789-80-8

About QUATERNIUM-18

A quaternary ammonium compound — mainly used in hair products for detangling and static control. CIR-reviewed and deemed safe as used.

Detailed Analysis

Quaternium-18 (CAS 61789-80-8) is a bis(hydrogenated tallow alkyl)dimethyl ammonium chloride, a cationic surfactant primarily used in hair care for antistatic and conditioning properties. The CIR Expert Panel reviewed it in 1982 and re-affirmed safety in 2003 and 2019/2020. Mild skin irritation observed at concentrations of 2-10% in animal studies. Not a sensitising agent. Widely used in conditioners and hair treatments.

What It Does

ANTISTATIC HAIR CONDITIONING SURFACTANT - CLEANSING

Skin Benefits

  • ✓ Antistatic properties
  • ✓ Hair detangling and manageability
  • ✓ Hair conditioning

Known Concerns

  • ⚠ Mild skin irritant at higher concentrations
  • ⚠ Environmental persistence of quaternary ammonium compounds

Safety Score

75

Good

Based on EU regulatory data, published safety research, and ingredient function analysis.

References

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EU CosIng Database

European Commission cosmetic ingredient registry

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This information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.