1,2-Naphthalic anhydride

1,2-萘二酸酐

Also known as: 1,2-Naphthalenedicarboxylic anhydride, Naphtho[1,2-c]furan-1,3-dione, benzo[e][2]benzofuran-1,3-dione, benzo[e]isobenzofuran-1,3-dione

1,2-Naphthalic anhydride (CAS 5343-99-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H6O3 and a molecular weight of 198.17400 g/mol. It is also known as 1,2-Naphthalenedicarboxylic anhydride, Naphtho[1,2-c]furan-1,3-dione and benzo[e][2]benzofuran-1,3-dione. Key properties include a melting point of 170ºC, a boiling point of 401.9ºC at 760 mmHg, a density of 1.449g/cm3 and a flash point of 203.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5343-99-7
Jingsj CID: J-26184-1
Molecular Formula: C₁₂H₆O₃
Chinese Name: 1,2-萘二酸酐
Molecular Weight: 198.17400 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	170ºC
Boiling Point	401.9ºC at 760 mmHg
Density	1.449g/cm3
Flash Point	203.1ºC

Frequently Asked Questions

What is the CAS number of 1,2-Naphthalic anhydride?

The CAS number of 1,2-Naphthalic anhydride is 5343-99-7.

What are the molecular formula and molecular weight of 1,2-Naphthalic anhydride?

1,2-Naphthalic anhydride has molecular formula C12H6O3 and molecular weight 198.17400 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1,2-Naphthalic anhydride (CAS 5343-99-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26184-1 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.