Pyrazolo[1,5-a]pyrimidin-5(4H)-one
[CAS# 29274-22-4]

Identification

• Classification: Pharmaceutical intermediate >> Heterocyclic compound intermediate >> Pyrimidine compound >> Ketones
• Name: Pyrazolo[1,5-a]pyrimidin-5(4H)-one
• Molecular Formula: C₆H₅N₃O
• Molecular Weight: 135.12
• CAS Registry Number: 29274-22-4
• EC Number: 694-865-7

Properties

• Solubility: Sparingly soluble (18 g/L) (25 °C), Calc.^*
• Density: 1.51±0.1 g/cm³ (20 °C 760 Torr), Calc.^*
• Boiling point: 243.2±40.0 °C (760 Torr), Calc.^*
• Flash point: 100.9±27.3 °C, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2019 ACD/Labs)

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H302
Acute toxicity	Acute Tox.	4	H332
Acute toxicity	Acute Tox.	4	H312
Skin irritation	Skin Irrit.	2	H315
Eye irritation	Eye Irrit.	2A	H319
Specific target organ toxicity - single exposure	STOT SE	3	H335