ketene

Also known as: ethenone, carbomethene, keto-ethylene, oxoethylene, methylene ketene, carbometene, Ethen-1-one, Keten

ketene (CAS 463-51-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C2H2O and a molecular weight of 42.03670 g/mol. Key properties include a melting point of -150ºC, a boiling point of -56ºC and a density of 0.712 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 463-51-4
Jingsj CID: J-1320646-2
Molecular Formula: C₂H₂O
Molecular Weight: 42.03670 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	-150ºC
Boiling Point	-56ºC
Density	0.712 g/cm3
Exact Mass	42.01060
PSA	17.07000
LogP	0.00400
Vapor Pressure	12600mmHg at 25°C
Refractive Index	1.303

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 ketene?

The CAS number of ketene is 463-51-4.

What are the molecular formula and molecular weight of ketene?

ketene has molecular formula C2H2O and molecular weight 42.03670 g/mol.

What are the upstream and downstream products of ketene?

For ketene, Upstream Products: Bromoacetyl chloride, acetic acid, 3-Pentanone; Downstream Products: 4-Acetamidophenyl 2,3,4-tri-O-acetyl-β-D-glucuronide methyl ester, (E)-3-Methyl-1,3-pentadiene, 2,3-DIMETHYL-1,3-BUTADIENE.

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. "ketene (CAS 463-51-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1320646-2 (accessed 2026-11-06).

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