Fragrance
2,6-DIMETHYLHEPTA-1,5-DIENE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A small unsaturated terpene-like hydrocarbon used for green top-notes. Flammable and air-sensitive — fine at trace fragrance levels, not a star ingredient.
2,6-Dimethylhepta-1,5-diene (CAS 6709-39-3) is a branched diene hydrocarbon used as a perfumery building block contributing green, herbal, and terpenic notes. GHS classifications typically include flammable liquid (H225) and aspiration hazard if swallowed (H304). Like other dienes, it can oxidize on air exposure to form peroxides and more reactive carbonyl species that can contribute to sensitization. Public SCCS/CIR cosmetic-specific data is limited. Standard practice in perfumery limits it to low percentages in finished formulations; default-yellow reflects the sparse public record.
Function
Skin benefits
- Green top-note
- Perfumery building block
Known concerns
- Flammability/aspiration hazard neat
- Autoxidation potential
- Limited public data
References
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.