C10H9ClN2O
208.64 g/mol
Pharmaceutical Intermediate
1-(3-Chlorophenyl)-3-methyl-2-pyrazolin-5-one
CAS90-31-3EC201-984-6
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
This compound is a chlorinated pyrazolone derivative used as an intermediate in pharmaceutical manufacturing. Its structure features a pyrazole ring with a chlorophenyl substituent, contributing to its role in synthetic chemistry.
pharmaceutical intermediate
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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Referencesame scaffold
1-(4-Chlorophenyl)-3-methyl-2-pyrazolin-5-one
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Referencesame scaffold
3-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid
CAS119-17-5
Dye and pigment intermediate
Referencesame scaffold
3-Methyl-1-(3,4-dimethylphenyl)-2-pyrazolin-5-one
CAS18048-64-1
pharmaceutical intermediate
Safety Reference
H411Toxic to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for 1-(3-Chlorophenyl)-3-methyl-2-pyrazolin-5-one (CAS 90-31-3) is 2933.19.
HS code (international, 6-digit)
2933.19
EU CN code (8-digit)
2933 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
2-(3-chlorophenyl)-5-methyl-4H-pyrazol-3-one
InChIKey
RIOMUJXIGYZENC-UHFFFAOYSA-N
SMILES
CC1=NN(C(=O)C1)C2=CC(=CC=C2)Cl
Synonyms (16)
- m-Chloropyrazone
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