Fragrance terpene
gamma-Terpinene; p-Mentha-1,4-diene
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A citrus-tea-tree terpene used for its fresh aroma. It readily oxidizes in air to form sensitizing hydroperoxides, so it is a recognized contact allergen and a flagged ingredient in fragrance allergy panels.
Skin benefits
- Naturally occurring terpene in citrus and tea tree oils contributing to fresh aroma
- Provides characteristic top-note in many essential-oil-based products
- Mild antioxidant activity reported in vitro
Known concerns
- Oxidizes on air exposure to form known skin sensitizers including hydroperoxides
- Listed among fragrance allergens of concern by EU SCCS opinions
- Can trigger contact dermatitis, particularly in aged or poorly stored products
- Inhalation may irritate airways at high concentrations
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related fragrance terpenes
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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.