1-Pentyne
[CAS# 627-19-0]

Identification

• Classification: Chemical reagent >> Organic reagent >> Alkyne
• Name: 1-Pentyne
• Synonyms: 1-Pentine; Propylacetylene
• Molecular Formula: C₅H₈
• Molecular Weight: 68.12
• CAS Registry Number: 627-19-0
• EC Number: 210-987-1

Properties

• Density: 0.6945 g/cm³ (20 ºC)^*
• Melting point: -90 ºC^**
• Boiling point: 51 ºC (20 Torr)^***
• Refractive index: 1.3859 (589.3 nm 20 ºC)^*****
• Flash point: -42.8±1.4 ºC, Calc.^****

^* Hall, Homer J.; Industrial and Engineering Chemistry 1936, V28, P57-9.

^** "PhysProp" data were obtained from Syracuse Research Corporation of Syracuse, New York (US)

^*** Vo-Quang, Liliane; Bulletin de la Societe Chimique de France 1965, (5), P1525-34.

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

^***** Levina, R. Ya.; Zhurnal Obshchei Khimii 1951, V21, P240-2.

Safety Data

• Hazard Symbols: F;Xn
• Risk Codes: R11;R36/37/38;R65
• Safety Description: S16;S26;S36;S62

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Flammable liquids	Flam. Liq.	2	H225
Aspiration hazard	Asp. Tox.	1	H304
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335
Eye irritation	Eye Irrit.	2	H319

• Transport Information: UN 3295BE 3 / PGII