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Key Documents

Safety Information

8.07080

Sigma-Aldrich

3-Methyl-1-phenyl-2-pyrazolin-5-one

for synthesis

Synonym(s):

3-Methyl-1-phenyl-2-pyrazolin-5-one, 1-Phenyl-3-methyl-5-pyrazolone

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About This Item

Empirical Formula (Hill Notation):
C10H10N2O
CAS Number:
89-25-8
Molecular Weight:
174.20
MDL number:
MFCD00003138
UNSPSC Code:
12352115
EC Index Number:
201-891-0

Quality Level

200

Assay

≥98.0% (GC)

potency

3500 mg/kg LD50, oral (Rat)

pH

4.0-4.4 (20 °C in H2O, saturated aqueous solution)

bp

191 °C/9.33 hPa

mp

127.5-129.5 °C

solubility

3.30 g/L

density

1.12 g/cm3 at 20 °C

bulk density

500 kg/m3

InChI

1S/C10H10N2O/c1-8-7-10(13)12(11-8)9-5-3-2-4-6-9/h2-6H,7H2,1H3

InChI key

QELUYTUMUWHWMC-UHFFFAOYSA-N

Analysis Note

Assay (GC, area%): ≥ 98.0 % (a/a)
Melting range (lower value): ≥ 125 °C
Melting range (upper value): ≤ 129 °C
Identity (IR): passes test

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H302 - H319

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Regulatory Information

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