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2-METHYL-4-(2,2,3-TRIMETHYL-3-CYCLOPENTENYL)-2-BUTEN-1-OL

CAS 28219-60-5
60

Safety score · 0–100

Fine

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

About

A sesquiterpene alcohol fragrance ingredient with a warm, woody-sandalwood-like scent, it carries skin irritant and sensitisation warnings and environmental hazard statements, requiring careful formulation control and professional use guidelines.

This trimethylcyclopentenyl butenol is a sesquiterpene fragrance ingredient structurally related to sandalwood constituents (e.g., various campholene aldehydes and alcohols). It carries H315 (causes skin irritation), H319 (causes serious eye irritation), H400 (very toxic to aquatic life), and H410 (toxic to aquatic life with long-lasting effects), with the Warning signal word. These classifications place it in the mid-range of fragrance safety concern, where formulation concentration limits and IFRA guidelines are particularly important. It is not listed in EU Annex restriction lists but must be handled with standard fragrance allergen precautions.

Skin benefits

  • Provides warm, woody-sandalwood fragrance notes desirable in fine fragrances
  • Used as a fragrance fixative enhancing substantivity

Known concerns

  • H315: Causes skin irritation
  • H319: Causes serious eye irritation
  • H400/H410: Aquatic toxicity
  • Fragrance allergen precautions apply
  • IFRA maximum concentration limits apply

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.