2,3,4,5,6,6-hexachloro-2,4-cyclohexadien-1-one

Also known as: 2,3,4,5,6,6-hexachlorocyclohexa-2,4-dienone, hexachloro-2,4-cyclohexadienone, 2,3,4,5,6,6-hexachloro-2,4-cyclohexadienone, 2,3,4,5,6,6-hexachlorocyclohexa-2,4-dien-1-one, 2,2,3,4,5,6-hexachloro-3,5-cyclohexadiene-1-one, 1,2,3,4,5,5-hexachloro-1,3-cyclohexadiene-6-one

2,3,4,5,6,6-hexachloro-2,4-cyclohexadien-1-one (CAS 21306-21-8) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C6Cl6O and a molecular weight of 300.78200 g/mol. Key properties include a melting point of 46-49ºC, a boiling point of 233.7ºC at 760mmHg, a density of 1.85g/cm3 and a flash point of 94.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 21306-21-8
Jingsj CID: J-41141-6
Molecular Formula: C₆Cl₆O
Molecular Weight: 300.78200 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	46-49ºC
Boiling Point	233.7ºC at 760mmHg
Density	1.85g/cm3
Flash Point	94.7ºC
Exact Mass	297.80800
PSA	17.07000
LogP	4.12140
Vapor Pressure	0.0551mmHg at 25°C
Refractive Index	1.602

Customs & Trade Information

HS Code	2914700090
Summary	HS: 2914700090 halogenated, sulphonated, nitrated or nitrosated derivatives of ketones and quinones, whether or not with other oxygen function Tax rebate rate:9.0% Supervision conditions:none VAT:17.0% MFN tariff:5.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 2,3,4,5,6,6-hexachloro-2,4-cyclohexadien-1-one?

The CAS number of 2,3,4,5,6,6-hexachloro-2,4-cyclohexadien-1-one is 21306-21-8.

What are the molecular formula and molecular weight of 2,3,4,5,6,6-hexachloro-2,4-cyclohexadien-1-one?

2,3,4,5,6,6-hexachloro-2,4-cyclohexadien-1-one has molecular formula C6Cl6O and molecular weight 300.78200 g/mol.

What are the upstream and downstream products of 2,3,4,5,6,6-hexachloro-2,4-cyclohexadien-1-one?

For 2,3,4,5,6,6-hexachloro-2,4-cyclohexadien-1-one, Upstream Products: Sodium pentachlorophenolate, Carbon tetrachloride, tert-Butyl hypochlorite; Downstream Products: 2-Chloro-4-methoxyphenol.

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. "2,3,4,5,6,6-hexachloro-2,4-cyclohexadien-1-one (CAS 21306-21-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-41141-6 (accessed 2026-11-09).

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