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5-Methyl-2-phenyl-1,2-dihydropyrazol-3-one Structure

5-Methyl-2-phenyl-1,2-dihydropyrazol-3-one

Chemical Properties

Melting point 126-128 °C(lit.)
Boiling point 287 °C265 mm Hg(lit.)
Density  1,12 g/cm3
vapor pressure  0.016Pa at 20℃
refractive index  1.6300 (estimate)
Flash point 191°C/17mm
storage temp.  2-8°C
solubility  3.30g/l
pka 2.73±0.50(Predicted)
form  Crystalline Powder
color  Yellow to beige
PH 4.0-4.4 (H2O, 20℃)(saturated aqueous solution)
Water Solubility  3 g/L (20 ºC)
Merck  14,6713
BRN  609575
Stability Stable for 2 years from date of purchase as supplied. Solutions in DMSO or ethanol may be stored at -20° for up to 3 months.
InChIKey QELUYTUMUWHWMC-UHFFFAOYSA-N
LogP 0.75 at 24℃
CAS DataBase Reference 89-25-8(CAS DataBase Reference)
FDA UNII S798V6YJRP
ATC code N07XX14
NIST Chemistry Reference 3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-2-phenyl-(89-25-8)
EPA Substance Registry System 1-Phenyl-3-methyl-5-pyrazolone (89-25-8)

Safety

Symbol(GHS)
Signal wordWarning
Hazard statements H302-H319
Precautionary statements P264-P270-P280-P301+P312-P305+P351+P338-P337+P313
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  1
RTECS  UQ9625000
TSCA  Yes
HS Code  29331990
Hazardous Substances Data 89-25-8(Hazardous Substances Data)
Toxicity LD50 orl-rat: 3500 mg/kg LONZA# 08FEB79
NFPA 704:
1
2 0

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