4-bromo-1,8-naphthalic anhydride

Also known as: 4-bromo-1,8-naphthalenedicarboxylic anhydride, 6-bromo-1H,3H-naphtho[1,8-cd]pyran-1,3-dione, 6-bromobenzo[de]isochromene-1,3-dione, 4-bromonaphthalic anhydride, 4-bromo-1,8-naphthalic anhydride

4-bromo-1,8-naphthalic anhydride (CAS 21563-29-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H5BrO3 and a molecular weight of 277.070 g/mol. Key properties include a melting point of 217-219ºC, a boiling point of 467.2±28.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 236.3±24.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 21563-29-1
Jingsj CID: J-1181314-2
Molecular Formula: C₁₂H₅BrO₃
Molecular Weight: 277.070 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	217-219ºC
Boiling Point	467.2±28.0 °C at 760 mmHg
Density	1.8±0.1 g/cm3
Flash Point	236.3±24.0 °C
Exact Mass	275.942200
PSA	43.37000
LogP	2.53
Vapor Pressure	0.0±1.2 mmHg at 25°C
Refractive Index	1.733
Storage Conditions	Room temperature.

Customs & Trade Information

HS Code	2942000000

Frequently Asked Questions

What is the CAS number of 4-bromo-1,8-naphthalic anhydride?

The CAS number of 4-bromo-1,8-naphthalic anhydride is 21563-29-1.

What are the molecular formula and molecular weight of 4-bromo-1,8-naphthalic anhydride?

4-bromo-1,8-naphthalic anhydride has molecular formula C12H5BrO3 and molecular weight 277.070 g/mol.

What are the upstream and downstream products of 4-bromo-1,8-naphthalic anhydride?

For 4-bromo-1,8-naphthalic anhydride, Downstream Products: 4-Bromo-3-nitro-1,8-naphthalic anhydride.

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. "4-bromo-1,8-naphthalic anhydride (CAS 21563-29-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1181314-2 (accessed 2026-11-09).

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