6-chloro-2H-chromen-2-one

Also known as: 6-chlorocoumarin, 6-chloro-2H-1-benzopyran-2-one, 6-chloro-chromen-2-one, 6-chloro-coumarin

6-chloro-2H-chromen-2-one (CAS 2051-59-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H5ClO2 and a molecular weight of 180.58800 g/mol. Key properties include a boiling point of 334.9ºC at 760 mmHg, a density of 1.399g/cm3 and a flash point of 181.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2051-59-4
Jingsj CID: J-1371545-2
Molecular Formula: C₉H₅ClO₂
Molecular Weight: 180.58800 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	334.9ºC at 760 mmHg
Density	1.399g/cm3
Flash Point	181.9ºC
Exact Mass	179.99800
PSA	30.21000
LogP	2.44640
Vapor Pressure	0.000124mmHg at 25°C
Refractive Index	1.608

Customs & Trade Information

HS Code	2932209090
Summary	2932209090. other lactones. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 6-chloro-2H-chromen-2-one?

The CAS number of 6-chloro-2H-chromen-2-one is 2051-59-4.

What are the molecular formula and molecular weight of 6-chloro-2H-chromen-2-one?

6-chloro-2H-chromen-2-one has molecular formula C9H5ClO2 and molecular weight 180.58800 g/mol.

What are the upstream and downstream products of 6-chloro-2H-chromen-2-one?

For 6-chloro-2H-chromen-2-one, Upstream Products: 5-Chlorosalicylaldehyde, Ethoxyethyne, 5-Chloro-2-methoxybenzaldehyde; Downstream Products: 5-Chlorosalicylic acid, 6-Chloro-2,2-dimethyl-4-chromanone.

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. "6-chloro-2H-chromen-2-one (CAS 2051-59-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1371545-2 (accessed 2026-11-09).

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