4,4'-Sulfonyldiphthalic anhydride

3,3',4,4'-二苯基砜四羧酸二酸酐

Also known as: 5,5'-Sulfonylbis(1,3-isobenzofurandione), 5,5'-Sulfonylbis(isobenzofuran-1,3-dione), 3,3',4,4'-Diphenylsulfonetetracarboxylic dianhydride, Diphenylsulfone-3,3',4,4'-tetracarboxylic dianhydride, 4,4'-Sulfonyldiphthalic dianhydride, DSDA

4,4'-Sulfonyldiphthalic anhydride (CAS 2540-99-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H6O8S and a molecular weight of 358.279 g/mol. It is also known as 5,5'-Sulfonylbis(1,3-isobenzofurandione), 5,5'-Sulfonylbis(isobenzofuran-1,3-dione) and 3,3',4,4'-Diphenylsulfonetetracarboxylic dianhydride. Key properties include a melting point of 283ºC, a boiling point of 718.5±45.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 388.4±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

2540-99-0

Jingsj CID

J-42478-5

Molecular Formula

C₁₆H₆O₈S

Chinese Name

3,3',4,4'-二苯基砜四羧酸二酸酐

Molecular Weight

358.279 g/mol

Category

Organic Acids

Last updated

8/21/2026