5-Oxo-1-phenyl-2-pyrazolin-3-carboxylic acid

1-苯基-3-羧酸基-5-吡唑酮

Also known as: 1-Phenyl-3-carboxy-5-pyrazolone, 3-Carboxy-1-phenyl-2-pyrazolin-5-one, 1-Phenyl-5-pyrazolone-3-carboxylic acid, 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-phenyl-, 5-Oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid, 5-oxo-1-phenyl-4H-pyrazole-3-carboxylic acid, 3-Carboxy-1-phenyl-5-pyrazolone

5-Oxo-1-phenyl-2-pyrazolin-3-carboxylic acid (CAS 119-18-6) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H8N2O3 and a molecular weight of 204.182 g/mol. It is also known as 1-Phenyl-3-carboxy-5-pyrazolone, 3-Carboxy-1-phenyl-2-pyrazolin-5-one and 1-Phenyl-5-pyrazolone-3-carboxylic acid. Key properties include a melting point of 237 °C(lit.), a boiling point of 375.1±25.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 180.6±23.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

119-18-6

Jingsj CID

J-23980-2

Molecular Formula

C₁₀H₈N₂O₃

Chinese Name

1-苯基-3-羧酸基-5-吡唑酮

Molecular Weight

204.182 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026