Prohibited industrial chemical (quaternary ammonium)
TETRAMETHYLAMMONIUM CHLORIDE
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Tetramethylammonium chloride is a toxic industrial quaternary ammonium salt with no cosmetic use. It is prohibited in EU cosmetic products and carries strong acute toxicity and skin irritation warnings.
Function
Skin benefits
- No legitimate cosmetic benefit
- Only an industrial laboratory reagent, never appropriate in skincare
Known concerns
- Toxic if swallowed and in contact with skin (GHS H300/H311)
- Causes skin irritation and serious organ effects (H315/H370)
- Prohibited from EU cosmetic products under Annex II
- Industrial chemical, not intended for personal-care use
- Aquatic toxicity raises environmental risk
References
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.