3-Hexyn-2-one

Also known as: hex-3-yn-2-one, 1-butynyl methyl ketone, 2-oxo-3-hexyne

3-Hexyn-2-one (CAS 1679-36-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C6H8O and a molecular weight of 96.127 g/mol. Key properties include a boiling point of 130.4±23.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 39.4±19.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1679-36-3
Jingsj CID: J-6691-1
Molecular Formula: C₆H₈O
Molecular Weight: 96.127 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	130.4±23.0 °C at 760 mmHg
Density	0.9±0.1 g/cm3
Flash Point	39.4±19.6 °C
Exact Mass	96.057518
PSA	17.07000
LogP	1.51
Appearance	Liquid \| Clear yellow
Vapor Pressure	9.7±0.2 mmHg at 25°C
Refractive Index	1.430

Customs & Trade Information

HS Code	2914190090
Summary	2914190090 other acyclic ketones without other oxygen function。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:5.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 3-Hexyn-2-one?

The CAS number of 3-Hexyn-2-one is 1679-36-3.

What are the molecular formula and molecular weight of 3-Hexyn-2-one?

3-Hexyn-2-one has molecular formula C6H8O and molecular weight 96.127 g/mol.

What are the upstream and downstream products of 3-Hexyn-2-one?

For 3-Hexyn-2-one, Upstream Products: Hex-3-yne, 1,2-Dibromobutane, N-Methoxy-N-methylacetamide; Downstream Products: 2-methylbenzoxazole, 2-Ethylbenzo[d]oxazole.

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

Last updated: 8/21/2026

How to cite: Jingsj. "3-Hexyn-2-one (CAS 1679-36-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6691-1 (accessed 2026-11-09).

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