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1,4-Dichlorobut-2-ene

CAS 764-41-0
12

Safety score · 0–100

Avoid

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

About

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

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.