Violet scent — regulated under EU Regulation 2023/1545 (expansion of declarable fragrance allergens from 26 to 81+).
CAS Number
127-51-5
EC Number
204-846-3
INCI Name
ALPHA-ISOMETHYL IONONE
Status
Declarable
Leave-on products
0.100%
= 10 mg/kg (10 ppm)
Rinse-off products
1.00%
= 100 mg/kg (100 ppm)
Alpha-Isomethyl Ionone must be separately declared in the ingredient list (INCI) when its concentration in the finished product exceeds these values. Below the threshold, no separate mention is required.
Alpha-Isomethyl Ionone is typically encountered as an isolated fragrance compound (often synthetic) rather than a constituent of the 30 essential oils in our reference database. Concentration data comes from your supplier's IFRA certificate, COA, or GC/MS report.
Upload your supplier PDFs and Allergen81 extracts every allergen, runs the threshold math (including pre-hapten grouping), and generates your INCI-compliant label.
Under EU Regulation 2023/1545, Alpha-Isomethyl Ionone must be listed separately in the ingredient declaration (INCI) when its concentration in the finished product exceeds 0.100% in leave-on products or 1.00% in rinse-off products.
Alpha-Isomethyl Ionone is most commonly encountered as an isolated fragrance compound rather than a natural constituent of the essential oils in our database. Check your supplier documentation for exact levels.