O-Desethyl sildenafil
[CAS# 139755-91-2]

Identification

• Name: O-Desethyl sildenafil
• Synonyms: 5-[2-Hydroxy-5-(4-methylpiperazinylsulfonyl)phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
• Molecular Formula: C₂₀H₂₆N₆O₄S
• Molecular Weight: 446.52
• CAS Registry Number: 139755-91-2
• EC Number: 641-936-5

Properties

• Solubility: Insoluble (4.9E^-3 g/L) (25 ºC), Calc.^*
• Density: 1.49±0.1 g/cm³ (20 ºC 760 Torr), Calc.^*

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

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Specific target organ toxicity - single exposure	STOT SE	3	H336
Eye irritation	Eye Irrit.	2	H319
Acute toxicity	Acute Tox.	4	H332
Skin sensitization	Skin Sens.	1	H317
Acute toxicity	Acute Tox.	4	H302
Skin irritation	Skin Irrit.	2	H315
Reproductive toxicity	Lact.	-	H362
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412