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Surfactant

OCTOXYNOL-9 CARBOXYLIC ACID

CAS 25338-58-3
58

Safety score · 0–100

Moderate

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

An ethoxylated alkylphenol carboxylic acid surfactant. The octylphenol backbone is an ECHA-listed endocrine disruptor and largely phased out in EU consumer products — use is fading on environmental grounds.

Function

SURFACTANT - CLEANSING

Skin benefits

  • Surfactant useful in technical cleansing
  • Compatible with hard water

Known concerns

  • Octylphenol parent has well-documented endocrine activity
  • Slow biodegradation, persistent in environment
  • Banned/restricted under EU REACH for many uses

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.