Aziridine
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A highly reactive, toxic three-membered heterocyclic amine ring used almost exclusively as an industrial chemical intermediate. It has no cosmetic use and poses severe health risks.
Aziridine (also known as ethylenimine) is a highly reactive, strained three-membered heterocycle with the formula C2H5N. It is used as an intermediate in chemical synthesis, particularly of polymers and pharmaceuticals. It is a known carcinogen (IARC Group 2A), causes severe skin burns and sensitization, and is highly toxic by inhalation and ingestion. Its reactivity makes it unsuitable for any cosmetic application. EU regulations restrict its presence in mixtures and prohibit its use in aerosols.
Skin benefits
- No skin benefits — this is an industrial chemical intermediate with significant toxicity
Known concerns
- EU severely restricted in cosmetics
- Known carcinogen (IARC Group 2A)
- Severe skin burns and sensitization
- Highly toxic by inhalation and ingestion
- Highly reactive — unstable in formulations
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.