4-Pentynoic acid ethyl ester
[CAS# 63093-41-4]

Identification

• Name: 4-Pentynoic acid ethyl ester
• Synonyms: 4-(Ethoxycarbonyl)-1-butyne; Ethyl 4-pentynoate
• Molecular Formula: C₇H₁₀O₂
• Molecular Weight: 126.15
• CAS Registry Number: 63093-41-4
• EC Number: 688-440-5

Properties

• Solubility: Slightly soluble (5.9 g/L) (25 ºC), Calc.^*
• Density: 0.942 g/cm³ (20 ºC)^**
• Boiling point: 159 ºC^**
• Refractive index: 1.4218 (589.3 nm 20 ºC)^**
• Flash point: 50.9±20.0 ºC, Calc.^*

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2016 ACD/Labs)

^** Colonge, Jean; Bulletin de la Societe Chimique de France 1954, P797-8.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Flammable liquids	Flam. Liq.	2	H225
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2	H319
Eye irritation	Eye Irrit.	2A	H319