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Surfactant

SODIUM NONOXYNOL-9 PHOSPHATE

50

Safety score · 0–100

Moderate

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

A nonoxynol-9 ethoxylate phosphate salt used as a surfactant. The N-9 family is a documented mucosal irritant and breaks down to environmentally problematic nonylphenols — restricted in the EU outside niche cosmetic uses.

Function

SURFACTANT - HYDROTROPESURFACTANT - CLEANSING

Skin benefits

  • Effective surfactant and hydrotrope
  • Solubilises actives in aqueous formulations

Known concerns

  • Nonoxynol-9 is a known mucosal irritant and spermicide
  • Trace 1,4-dioxane risk from ethoxylation
  • Endocrine-disruption questions for NPEs
  • Aquatic toxicity of nonylphenol breakdown

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.