4-Chloro-2H-pyridazin-3-one
[CAS# 1677-79-8]

Identification

• Classification: Pharmaceutical intermediate >> Heterocyclic compound intermediate >> Pyridazine
• Name: 4-Chloro-2H-pyridazin-3-one
• Synonyms: 4-Chloro-3-pyridazone; 4-Chloropyridazin-3-one
• Molecular Formula: C₄H₃ClN₂O
• Molecular Weight: 130.53
• CAS Registry Number: 1677-79-8
• EC Number: 890-397-4

Properties

• Solubility: Sparingly soluble (26 g/L) (25 °C), Calc.^*
• Density: 1.55±0.1 g/cm³ (20 °C 760 Torr), Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2015 ACD/Labs)

Safety Data

Hazard Classification

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