1,4-Dichlorobut-2-ene
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
1,4-Dichlorobut-2-ene is a cosmetic ingredient used in product formulation. Exercise caution due to limited available safety data.
1,4-Dichlorobut-2-ene is a reactive halogenated alkene with potent alkylating properties and documented carcinogenic effects in animal studies. It is a substance of very high concern (SVHC) and is not listed in EU cosmetic ingredient databases, effectively prohibiting its use in leave-on or rinse-off cosmetic products. Its high reactivity makes it unsuitable for topical application.
Known concerns
- Known carcinogen
- Highly reactive alkylating agent
- Not approved for cosmetic use
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.