C9H6O2
146.14 g/mol
Pharmaceutical IntermediateWarning
4H-Chromen-4-one
CAS491-38-3EC207-737-9
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
4H-This compound, also known as chromone, is the simplest member of the chromone class, consisting of a 4H-chromene core with an oxo group at position 4. It serves as a pharmaceutical intermediate in the manufacturing of various compounds.
Pharmaceutical intermediateBuilding block in organic synthesis
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
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ReferenceSame Category
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pharmaceutical intermediate
ReferenceSame Category
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pharmaceutical intermediate
ReferenceSame Category
Carbamic acid, phenyl-, phenyl ester (9CI)
CAS4930-03-4
pharmaceutical intermediate
Referencesame scaffold
Chromocarb
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pharmaceutical raw material
Referencesame scaffold
3-Formyl-6-isopropylchromone
CAS49619-58-1
research compound
Referencesame scaffold
3-Cyano-6-isopropylchromone
CAS50743-32-3
pharmaceutical intermediate
Referencesame scaffold
6-Fluorochromone-2-carboxylic acid
CAS99199-59-4
pharmaceutical intermediate
Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4H-Chromen-4-one (CAS 491-38-3) is 2932.99.
HS code (international, 6-digit)
2932.99
EU CN code (8-digit)
2932 99 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
chromen-4-one
InChIKey
OTAFHZMPRISVEM-UHFFFAOYSA-N
SMILES
C1=CC=C2C(=C1)C(=O)C=CO2
Synonyms (15)
- 1,4-benzopyrone
- 1-Benzopyran-4-one
- 4-Chromone
- 4-chromenone
- 4-oxo-4H-1-benzopyran
- 4H-1-Benzopyran-4-one
- 4H-Benzo(b)pyran-4-one
- 4H-Chromen-4-one
- 4H-chromen-4-one [M+H]+
- Benz-g-pyrone
- Benzo-gamma-pyrone
- Benzopyrone
- Chromone-
- benzo-|A-pyrone
- chromone, 12
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