Reducing Agent
SODIUM 3-MERCAPTOPROPANE SULFONATE
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A thiol-sulfonate reducing agent used in hair-waving and straightening systems. Like all thiols, it carries skin/respiratory sensitization risk and a strong sulfur odor; that pulls it into use-with-awareness.
Function
Skin benefits
- Reducing for hair perming/straightening
- Effective at low use levels
Known concerns
- Thiols are skin and respiratory sensitizers
- Strong sulfur odor
- Eye and skin irritation potential
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related reducing agents
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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.