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Surfactant

SODIUM METHYL STEARATE SULFONATE

CAS 4062-78-6 Updated
55

Safety score · 0–100

Moderate

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

About

A mild fatty-acid sulfonate surfactant (alpha-sulfo methyl ester) used in syndet bars and detergents. Eye-irritating in raw form but well tolerated as a finished rinse-off ingredient.

Function

CLEANSINGSURFACTANT - FOAM BOOSTINGSURFACTANT - CLEANSING

Skin benefits

  • Mild anionic surfactant from fatty acid feedstock
  • Used as soap alternative in syndet bars

Known concerns

  • GHS H319 serious eye irritation
  • GHS H304 aspiration hazard if powdered
  • GHS H318 serious eye damage in some reports
  • Surfactant defatting at high levels

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.