3(2H)-Pyridazinone
[CAS# 504-30-3]

Identification

• Classification: Pharmaceutical intermediate >> Heterocyclic compound intermediate >> Pyridazine
• Name: 3(2H)-Pyridazinone
• Synonyms: Pyridazin-3(2H)-one
• Molecular Formula: C₄H₄N₂O
• Molecular Weight: 96.09
• CAS Registry Number: 504-30-3
• EC Number: 628-659-5

Properties

• Melting point: 98-104 °C

Safety Data

• Hazard Symbols: Xi
• Risk Statements: R36/37/38
• Safety Statements: S26;S36/37

Hazard Classification

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