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2,3,4-Trichlorobut-1-ene

CAS 2431-50-7
28

Safety score · 0–100

Caution

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

2,3,4-Trichlorobut-1-ene is a cosmetic ingredient used in product formulation. Exercise caution due to limited available safety data.

2,3,4-Trichlorobut-1-ene is a highly chlorinated unsaturated hydrocarbon with the double bond between C1 and C2 and three chlorine atoms at C2, C3, and C4. The allylic dichloromethylene group (CCl2 adjacent to a double bond) is a structural alert for carcinogenicity, and the overall degree of chlorination raises concerns for environmental persistence. While not listed in EU Annex II (banned substances), the structural characteristics suggest this compound would face severe restrictions if submitted for cosmetics review. It is more characteristic of industrial intermediates than cosmetic ingredients.

Known concerns

  • Highly chlorinated structure raises environmental persistence concerns
  • Structural alert for carcinogenicity from allylic CCl2 group
  • Not a traditional cosmetic ingredient - industrial intermediate
  • Potential for bioaccumulation of chlorinated hydrocarbons
  • Lack of cosmetics safety data

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