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Pent-1-yne

Also known as: 1-n-pentylazacycloheptan-2-one, 1-n-pentyne, 1-pentyne, 2H-Azepin-2-one,hexahydro-1-pentyl, 4-pentyne, Acetylene, propyl-, EINECS 210-987-1, Ethylmethylacetylene, MFCD00009469, Pent-1-in, n-pent-1-yne, n-propylacetylene, propylacetylene

Pent-1-yne (CAS 627-19-0) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H8 and a molecular weight of 68.117 g/mol. Key properties include a melting point of -106 °C, a boiling point of 40.9±3.0 °C at 760 mmHg, a density of 0.7±0.1 g/cm3 and a flash point of -42.8±1.4 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
627-19-0
Jingsj CID
J-46540-9
Molecular Formula
C5H8
Molecular Weight
68.117 g/mol
Category
Aliphatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Melting Point-106 °C
Boiling Point40.9±3.0 °C at 760 mmHg
Density0.7±0.1 g/cm3
Flash Point-42.8±1.4 °C
Exact Mass68.062599
LogP2.06
Vapor Pressure428.0±0.0 mmHg at 25°C
Refractive Index1.401

Frequently Asked Questions

What is the CAS number of Pent-1-yne?

The CAS number of Pent-1-yne is 627-19-0.

What are the molecular formula and molecular weight of Pent-1-yne?

Pent-1-yne has molecular formula C5H8 and molecular weight 68.117 g/mol.

What are the upstream and downstream products of Pent-1-yne?

For Pent-1-yne, Upstream Products: 1,2-Dibromopentane, Sodium acetylide, 1-bromopropane; Downstream Products: 1,2-Dibromopentane, 1-Pentyn-1-ylbenzene, Diphenyl disulfide.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Pent-1-yne (CAS 627-19-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-46540-9 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.