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Fragrance

ISOPROPYL-METHYLCYCLOHEXADIENE

CAS 4221-98-1 Updated
55

Safety score · 0–100

Moderate

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

About

An isopropyl-methyl cyclohexadiene (a phellandrene-class terpene). Useful citrus-peppery fragrance note but air-oxidation produces allergenic peroxides – a sensitiser risk.

Function

PERFUMING

Skin benefits

  • Citrus/peppery fragrance note
  • Found in many essential oils

Known concerns

  • Cyclohexadiene oxidises to allergenic peroxides
  • Skin sensitiser potential
  • Air-sensitive – stability concerns

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.