C4H6O2
86.09 g/mol
Flavor & FragranceDanger
2,3-butanedione
CAS431-03-8EC207-069-8
Category
Flavor & Fragrance
Compound Class
Other
Primary Use
Butter flavor carrier
Diacetyl, also known as 2,3-butanedione, is an organic compound with an intensely buttery flavor. It is a yellow liquid and a vicinal diketone.
Butter flavor carrierFlavoring agent in food products
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
3-Furanmethanol
CAS4412-91-3
flavor and fragrance ingredient
ReferenceSame Category
Octahydrocoumarin
CAS4430-31-3
Fragrance ingredient in fruity-floral compositions
ReferenceSame Category
2,2'-(dithiodimethylene)difuran
CAS4437-20-1
Flavor and fragrance ingredient
ReferenceSame Category
3,4-hexanedione
CAS4437-51-8
flavoring agent
Safety Reference
Danger
H225Highly flammable liquid and vapour
H302Harmful if swallowed
H315Causes skin irritation
H317May cause an allergic skin reaction
H318Causes serious eye damage
H331Toxic if inhaled
H373May cause damage to organs through prolonged or repeated exposure
H332Harmful if inhaled
H335May cause respiratory irritation
H351Suspected of causing cancer
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for 2,3-butanedione (CAS 431-03-8) is 2914.19.
HS code (international, 6-digit)
2914.19
EU CN code (8-digit)
2914 19 90
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
butane-2,3-dione
InChIKey
QSJXEFYPDANLFS-UHFFFAOYSA-N
SMILES
CC(=O)C(=O)C
Synonyms (24)
- BUO
- 2,3-Butadione
- 2,3-Butanedione (8CI,9CI)
- 2,3-Butanedione-13C2
- 2,3-butandione
- 2,3-butanedione
- 2,3-diketobutane
- 2,3-dioxobutane
- Biacetyl; BDM
- Buta-2,3-dione
- Butan-2,3-dione
- Butane-2,3-dione
- Butanedione
- Diacetyl (natural)
- Diketobutane
- Glyoxal, dimethyl-
- biacetyl
- butadione
- butane 2
- diacetyl
- dimethyl diketone
- dimethylglyoxal
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