Reducing Agent
MERCAPTOPROPIONIC ACID
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A toxic, corrosive thiol acid used in some industrial hair perm/depilatory chemistry. Carries acute toxicity, skin corrosion, and severe eye damage GHS warnings — only safe under strict professional formulation.
Function
Skin benefits
- Hair-shaping reducing chemistry (professional)
Known concerns
- Acute oral and dermal toxicity
- Corrosive to skin and eyes
- Strong odor
- Industrial-grade hazards
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.