Flavors & Fragrances
REACH
Alpha-Ionol
CAS Number
25312-34-9
EC Number
246-815-7
FEMA Number
FEMA 3624
What is Alpha-Ionol?
Alpha-Ionol (CAS 25312-34-9), also known by its FEMA 3624 designation, is a violet-woody aroma chemical used in flavor and fragrance manufacturing.
Where is Alpha-Ionol used?
- Fine fragrance and personal care: violet, orris, and woody facets in eau de parfum, body lotions, and hair care products
- Flavor systems: berry, grape, raspberry, and tea with a soft floral-woody background note
- Functional fragrance: fabric softeners and household cleaners, with tenacity on substrates
- Food-grade use is permitted under FEMA GRAS status in baked goods and beverages.
Good to know: Food-grade use is permitted under FEMA GRAS status; buyers reference FEMA 3624 compliance for food applications.
Commercial specifications
- Liquid, typically at high purity levels
- Packaging from small drums to bulk quantities
Other Names (Synonyms)
α-ionol|Ionol 99|(E)-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-ol
What are the physical properties of Alpha-Ionol?
Boiling Point 127.5-128 °C @ Press: 15 Torr
Density 0.9192 g/cm³ @ Temp: 18 °C
Flash Point 93.4 °C
Color Colourless
Odor at 100.00 %. ionone tropical sweet floral violet woody
Form Oil
Refractive Index n 20/D 1.491
Log P 4.31
Which trade and regulatory codes apply to Alpha-Ionol?
Storage Class 10 - Combustible liquids
WGK (Germany) 2