1H-Pyrazolo[3,4-d]pyrimidine-4-thiol
[CAS# 5334-23-6]

Identification

• Name: 1H-Pyrazolo[3,4-d]pyrimidine-4-thiol
• Synonyms: 4-Mercaptopyrazolo[3,4-d]pyrimidine; 5H-Pyrazolo[3,4-d]pyrimidine-4-thione; 8-Aza-7-deaza-6-thiopurine; Allopurinol, thio-; MPP; MPP (pharmaceutical); NSC 1392; Thiopurinol; Tisopurine
• Molecular Formula: C₅H₄N₄S
• Molecular Weight: 152.18
• CAS Registry Number: 5334-23-6
• EC Number: 226-251-8

Properties

• Solubility: Slightly soluble (1.3 g/L) (25 ºC), Calc.^*
• Density: 1.82±0.1 g/cm³ (20 ºC 760 Torr), Calc.^*
• Melting point: >360 ºC (ethanol, 30% )^**

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2014 ACD/Labs)

^** Robins, Roland K.; Journal of the American Chemical Society 1956, V78, P784-90.

Safety Data

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