1-cyclopentene-1,2-dicarboxylic anhydride

1-环戊烯-1,2-二羧酸酐

Also known as: 1-cyclopentene-1,2-dicarboxylic acid anhydride, cyclopentene-1,2-dicarboxylic acid anhydride, 5,6-dihydro-4H-cyclopenta[c]furan-1,3-dione, 5,6-dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione, NSC 291644, cyclopent-1-ene-1,2-dicarboxylic anhydride

1-cyclopentene-1,2-dicarboxylic anhydride (CAS 3205-94-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H6O3 and a molecular weight of 138.12100 g/mol. It is also known as 1-cyclopentene-1,2-dicarboxylic acid anhydride, cyclopentene-1,2-dicarboxylic acid anhydride and 5,6-dihydro-4H-cyclopenta[c]furan-1,3-dione. Key properties include a melting point of 42-45ºC(lit.), a boiling point of 133-135ºC10 mm Hg(lit.), a density of 1.37g/cm3 and a flash point of 113 °C - closed cup(lit.). GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

3205-94-5

Jingsj CID

J-36789-3

Molecular Formula

C₇H₆O₃

Chinese Name

1-环戊烯-1,2-二羧酸酐

Molecular Weight

138.12100 g/mol

Category

Organic Acids

Last updated

8/21/2026