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PENTAMETHYL-CYCLOPENT-1-ENYL METHYL KETONE

CAS 13144-88-2
50

Safety score · 0–100

Moderate

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

About

Pentamethyl-cyclopent-1-enyl Methyl Ketone is a cosmetic ingredient used in product formulations. Exercise caution due to limited available safety data.

This heavily alkylated cyclopentenyl ketone carries an H317 hazard statement indicating skin sensitization risk. The multiple methyl substituents dramatically increase lipophilicity and may influence both fragrance substantivity on skin and allergenic potential. EU cosmetic regulation classifies fragrance materials with H317 statements as contact allergens requiring mandatory declaration on product ingredient lists above specified thresholds.

Skin benefits

  • fragrance function

Known concerns

  • skin sensitizer (H317)
  • fragrance allergen declaration required

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.