Piprocurarium iodide (INN)
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Piprocurarium Iodide (inn) is a cosmetic ingredient. Exercise caution due to limited available safety data.
Piprocurarium iodide is a bis-quaternary ammonium neuromuscular blocking agent (aminosteroid) used as an inhaled paralytic in surgical anesthesia. Its mechanism (nicotinic acetylcholine receptor antagonism) produces skeletal muscle paralysis. The EU Cosmetics Regulation Annex III restricts pipo-curarium iodide at ≥0.1% in cosmetic products. Any systemic absorption from topical application could produce life-threatening respiratory muscle paralysis, making cosmetic use entirely inappropriate.
Known concerns
- Neuromuscular blocking activity
- Skeletal muscle paralysis risk
- Respiratory failure concern
- Quaternary ammonium toxicity
- Restricted to ≤0.1% in EU cosmetics
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 — always read the physical product label and consult a healthcare professional for personal concerns.