C13H20O
192.3 g/mol
Flavor & FragranceWarning
ALPHA-IONONE
CAS127-41-3EC204-841-6
Category
Flavor & Fragrance
Compound Class
Other
Primary Use
Fragrance ingredient in perfumery and flavoring agent
Alpha-ionone is an ionone compound that functions as an enone and a methyl ketone. It is widely used as a fragrance ingredient in perfumery and as a flavoring agent in food products.
Fragrance ingredient in perfumery, cosmetics, and personal care productsFlavoring agent in beverages, baked goods, and candiesIngredient in household cleaners and detergents
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
ReferenceSame Category
Methyl ionone
CAS127-42-4
Fragrance ingredient
ReferenceSame Category
Isomethyl-α-ionone
CAS127-51-5
Fragrance and cosmetic ingredient
ReferenceSame Category
Beta-pinene
CAS127-91-3
fragrance and flavoring intermediate
ReferenceSame Category
9-decen-1-ol
CAS13019-22-2
fragrance ingredient in fine fragrances and soaps
Referencestereoisomer of
Ionone
CAS8013-90-9
Fragrance ingredient
Safety Reference
Warning
H315Causes skin irritation
H317May cause an allergic skin reaction
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
Customs Tariff Classification
The international HS code for ALPHA-IONONE (CAS 127-41-3) is 2914.23.
HS code (international, 6-digit)
2914.23
EU CN code (8-digit)
2914 23 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
(E)-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one
InChIKey
UZFLPKAIBPNNCA-BQYQJAHWSA-N
SMILES
CC1=CCCC(C1/C=C/C(=O)C)(C)C
Synonyms (31)
- (5E)-IONONE
- (E)-alpha-Ionone
- (E)-alpha-lonone
- ALPHA-IONONE
- Ionone, alpha-
- Iraldeine
- a-Ionone (>90%)
- a-ionone
- alpha-(E)-ionone
- alpha-Cyclocitrylideneacetone
- alpha-Ionon
- alpha-Ionone (>90per cent)
- alpha-Ionone (natural)
- alpha-Jonone
- beta-lonone
- beta-lonone (natural)
- trans-alpha-Ionone
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