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Hydrocarbons, C1-4, debutanizer fraction, if they contain > 0.1% w/w Butadiene

CAS 68527-19-5
2

Safety score · 0–100

Avoid

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

A C1–C4 debutanizer fraction from petroleum processing that contains butadiene above 0.1% w/w, placing it in the most restricted category of substances under EU cosmetic regulation.

Very light hydrocarbon stream (C1–C4) taken from the debutanizer overhead of a refinery fractionation column, containing residual 1,3-butadiene above the 0.1% w/w trigger. 1,3-Butadiene is classified as a CMR Cat 1A substance and is listed on EU Annex II of Regulation 1223/2009 as absolutely prohibited for cosmetic use, reflecting its potent mutagenic and carcinogenic hazard even at trace levels via dermal exposure.

Known concerns

  • Contains 1,3-butadiene >0.1% w/w — EU Annex II CMR Cat 1A mutagenic carcinogen, absolutely prohibited in cosmetics
  • Extremely volatile gases with high inhalation and dermal hazard
  • IARC Group 1 and US EPA Group A known human carcinogen
  • No safe dermal or inhalation exposure level established

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.