5-(Thiophen-2-yl)-1H-pyrazole-3-carboxylic acid ethyl ester
[CAS# 121195-03-7]

Identification

• Name: 5-(Thiophen-2-yl)-1H-pyrazole-3-carboxylic acid ethyl ester
• Synonyms: Ethyl 5-thiophen-2-yl-2H-pyrazole-3-carboxylate
• Molecular Formula: C₁₀H₁₀N₂O₂S
• Molecular Weight: 222.26
• CAS Registry Number: 121195-03-7
• EC Number: 639-282-0

Properties

• Solubility: Practically insoluble (0.02 g/L) (25 ºC), Calc.^*
• Density: 1.306±0.06 g/cm³ (20 ºC 760 Torr), Calc.^*
• Melting point: 137 ºC (ethanol )^**

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

^** Ghoneim, K. M.; Egyptian Journal of Pharmaceutical Sciences 1988, V29(1-4), P571-6.

Safety Data

Hazard Classification

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