C4H4O2
84.07 g/mol
Industrial ChemicalWarning
Diketene
CAS674-82-8EC211-617-1
Category
Industrial Chemical
Compound Class
Heterocycle
Primary Use
Production of paints and pharmaceuticals
Diketene is a colorless liquid with a disagreeable odor that is slightly less dense than water. It is an industrial chemical used primarily in the production of paints and pharmaceuticals, and it can irritate the skin and eyes.
Production of paintsManufacture of pharmaceutical intermediatesSynthetic organic chemistry reagent
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
4-Bromo-2,6-difluoroaniline
CAS67567-26-4
chemical synthesis intermediate
ReferenceSame Category
1,4-bis(methoxymethyl)benzene
CAS6770-38-3
chemical intermediate
ReferenceSame Category
Perfluoropentane
CAS678-26-2
Ultrasound contrast agent
ReferenceSame Category
1H,1H,2H,2H-perfluoro-1-decanol
CAS678-39-7
Surfactant and polymer production for coatings
Safety Reference
Warning
H226Flammable liquid and vapour
H332Harmful if inhaled
H302Harmful if swallowed
H315Causes skin irritation
H318Causes serious eye damage
H330Fatal if inhaled
H331Toxic if inhaled
H335May cause respiratory irritation
H371May cause damage to organs
Regulatory Compliance1
- CN Catalogue of Hazardous ChemicalsCNRegulation
Customs Tariff Classification
The international HS code for Diketene (CAS 674-82-8) is 2932.20.
HS code (international, 6-digit)
2932.20
EU CN code (8-digit)
2932 20 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
4-methylideneoxetan-2-one
InChIKey
WASQWSOJHCZDFK-UHFFFAOYSA-N
SMILES
C=C1CC(=O)O1
Synonyms (18)
- 2-Oxetanone, 4-methylene-
- 3-Buteno-beta-lactone
- 4-Methylene-2-oxetanone
- 4-Methylidene-2-oxetanone
- 4-methyleneoxetan-2-one
- 4-methylideneoxetan-2-one
- Acetyl ketene
- Diketen
- Diketene
- Diketene, inhibited
- Ethenone, dimer
- Ethenone, dimer (VAN)
- Ketene, dimer
- Vinylaceto-beta-lactone
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