Acetoin
CAS Number: 513-86-0
Acetoin (CAS 513-86-0), also known as 3-hydroxy-2-butanone, is a naturally occurring hydroxy ketone produced during fermentation, imparting a mild, creamy, buttery, and slightly sweet aroma. It is widely used as a food flavoring agent, often in conjunction with diacetyl, to create soft, rounded butter and cream flavor profiles.
Technical Specifications
| appearance | Pale yellow to yellow liquid |
| purity (%) | ≥99.0 |
| assay method | GC |
| refractive index | 1.416–1.420 |
Applications
- Mild buttery flavor in dairy products, baked goods, and spreads
- Cream and butter flavor blending with diacetyl for rounded profiles
- Wine and beer fermentation character at low natural levels
- Soft drink and beverage flavoring for creamy, sweet notes
- Confectionery and candy product subtle butter flavoring
Key Features
- Milder, more rounded butter character compared to diacetyl for subtle flavoring
- Natural fermentation origin supporting clean-label and natural flavor positioning
- FEMA GRAS approved with broad regulatory acceptance in food applications
- Excellent compatibility with diacetyl and cream flavor compounds for balanced profiles