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Tetrylammonium bromide (INN)

CAS 71-91-0
25

Safety score · 0–100

Caution

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

About

Tetrylammonium Bromide (inn) is a cosmetic ingredient. Exercise caution due to limited available safety data.

Tetrylammonium bromide is listed in Annex III of EU Regulation (EC) No 1223/2009, restricting its use in cosmetic products. As a quaternary ammonium compound, it has structural similarities to acetylcholine and can act on nicotinic and muscarinic receptors. Systemic absorption from topical application may produce neuromuscular blocking effects and other serious adverse reactions.

Known concerns

  • EU Annex III restricted (not banned outright)
  • Quaternary ammonium compound with systemic toxicity concerns
  • Potential neuromuscular blocking activity
  • Restricted use in cosmetics

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 — always read the physical product label and consult a healthcare professional for personal concerns.