1-(4-Fluorophenyl)-3-methyl-2-pyrazolin-5-one
[CAS# 100553-83-1]

Identification

• Name: 1-(4-Fluorophenyl)-3-methyl-2-pyrazolin-5-one
• Synonyms: 1-(4-Fluorophenyl)-3-methyl-4,5-dihydropyrazole-5-one
• Molecular Formula: C₁₀H₉FN₂O
• Molecular Weight: 192.19
• CAS Registry Number: 100553-83-1
• EC Number: 843-337-6

Properties

• Density: 1.26
• Melting point: 148-149 °C

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H302
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2A	H319
Skin irritation	Skin Irrit.	2	H315