1,2-Dihydro-3H-pyrazol-3-one

Modify Date: 2025-08-25 07:34:50

1,2-Dihydro-3H-pyrazol-3-one Structure
1,2-Dihydro-3H-pyrazol-3-one structure
Common Name 1,2-Dihydro-3H-pyrazol-3-one
CAS Number 137-45-1 Molecular Weight 84.077
Density 1.4±0.1 g/cm3 Boiling Point 326.1±15.0 °C at 760 mmHg
Molecular Formula C3H4N2O Melting Point 163 °C
MSDS N/A Flash Point 151.0±20.4 °C

 Names

Name 1H-Pyrazol-3(2H)-one
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.4±0.1 g/cm3
Boiling Point 326.1±15.0 °C at 760 mmHg
Melting Point 163 °C
Molecular Formula C3H4N2O
Molecular Weight 84.077
Flash Point 151.0±20.4 °C
Exact Mass 84.032364
PSA 48.65000
LogP 0.25
Vapour Pressure 0.0±0.7 mmHg at 25°C
Index of Refraction 1.612

 Safety Information

Hazard Codes Xi

 Precursor & DownStream

Precursor  0

DownStream  1

 Synonyms

1H-pyrazol-3-ol
1H-Pyrazol-5-ol
3h-pyrazol-3-one, 1,2-dihydro-
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