7-METHYL-3-METHYLENE-1,6-OCTADIENE HYDROCARBONS
Fragrance
Moderate
CAS Number: 90480-40-3
About 7-METHYL-3-METHYLENE-1,6-OCTADIENE HYDROCARBONS
A terpene hydrocarbon fragrance component derived from essential oils, used for perfuming cosmetic products. Terpene hydrocarbons can act as fragrance allergens requiring mandatory declaration on EU ingredient labels under the Cosmetics Regulation's 26-compound allergen list.
Detailed Analysis
7-Methyl-3-methylene-1,6-octadiene is an acyclic monoterpene hydrocarbon with a structure characteristic of myrcene derivatives found in essential oils. It functions as a perfuming ingredient in cosmetic formulations. The EU Cosmetics Regulation (1223/2009) Annex III, paragraph 1 lists 26 fragrance allergens requiring mandatory declaration when present above 0.001% in leave-on or 0.01% in rinse-off products. Terpenoid fragrance compounds are among these declared allergens. PubChem safety score of 72 reflects the known contact allergenicity potential of unsaturated terpene hydrocarbons, which can oxidize and form sensitizing oxidation products on storage.
What It Does
Skin Benefits
- ✓ Fragrance/perfuming function in cosmetic formulations
Known Concerns
- ⚠ Fragrance allergen requiring mandatory EU label declaration above threshold
- ⚠ Oxidation products (hydroperoxides) can increase sensitization risk upon storage
- ⚠ Potential for skin sensitization in predisposed individuals
Safety Score
Moderate
Based on EU regulatory data, published safety research, and ingredient function analysis.
References
EU CosIng Database
European Commission cosmetic ingredient registry
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