8-Bromo-2H-1-benzopyran-2-one

Also known as: 8-Bromo-2H-chromen-2-one, 8-Bromochromen-2-one, 8-bromocoumarin, 8-bromo-2-oxo-2H-chromene, 2H-1-Benzopyran-2-one, 8-bromo-

8-Bromo-2H-1-benzopyran-2-one (CAS 33491-30-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H5BrO2 and a molecular weight of 225.039 g/mol. Key properties include a boiling point of 352.2±37.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 166.8±26.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 33491-30-4
Jingsj CID: J-1365432-5
Molecular Formula: C₉H₅BrO₂
Molecular Weight: 225.039 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	352.2±37.0 °C at 760 mmHg
Density	1.7±0.1 g/cm3
Flash Point	166.8±26.5 °C
Exact Mass	223.947281
PSA	30.21000
LogP	2.13
Vapor Pressure	0.0±0.8 mmHg at 25°C
Refractive Index	1.631

Customs & Trade Information

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. 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 8-Bromo-2H-1-benzopyran-2-one?

The CAS number of 8-Bromo-2H-1-benzopyran-2-one is 33491-30-4.

What are the molecular formula and molecular weight of 8-Bromo-2H-1-benzopyran-2-one?

8-Bromo-2H-1-benzopyran-2-one has molecular formula C9H5BrO2 and molecular weight 225.039 g/mol.

What are the upstream and downstream products of 8-Bromo-2H-1-benzopyran-2-one?

For 8-Bromo-2H-1-benzopyran-2-one, Upstream Products: 3-Bromo-2-hydroxybenzaldehyde, DL-Malic acid, 2-Bromophenol.

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. "8-Bromo-2H-1-benzopyran-2-one (CAS 33491-30-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1365432-5 (accessed 2026-11-09).

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