An acid anhydride derived by loss of water between two carboxylic groups in the same molecule so as to close a ring.
| Member | Definition | Role |
|---|
| 1,8-naphthalenedicarboxylic acid anhydride | | Naphthalic anhydride |
| cantharidin | A monoterpenoid with an epoxy-bridged cyclic dicarboxylic anhydride structure secreted by many species of blister beetle, and most notably by the Spanish fly, Lytta vesicatoria. Natural toxin inhibitor of protein phosphatases 1 and 2A. | cantharidin |
| cornexistin | A cyclic dicarboxylic anhydride that is 5,6,7,8,9,10-hexahydro-1H-cyclonona[c]furan-1,3(4H)-dione substituted by an ethylidene group at position 9, hydroxy groups at position 5 and 8, a propyl group at position 4 and an oxo group at position 6. | 14-dihydroxycornestin |
| glutaric anhydride | A cyclic dicarboxylic anhydride that is oxane which carries oxo groups at positions 2 and 6. It is used as an intermediate in the production of pharmaceuticals, corrosion inhibitors, and polymers (E.g. epoxy polyesters). | glutaric anhydride |
| maleic anhydride | A cyclic dicarboxylic anhydride that is the cyclic anhydride of maleic acid. | maleic anhydride |
| phthalic anhydride | The cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. | phthalic anhydride |
| succinic anhydride | | succinic anhydride |
| tetrabromophthalic anhydride | | Tetrabromophthalic anhydride |
| tetrachlorophthalic anhydride | A cyclic dicarboxylic anhydride that is phthalic anhydride chlorinated at the 4-, 5-, 6- and 7-positions. | tetrachlorophthalic anhydride |
| trimellitic anhydride | A 2-benzofuran compound having oxo groups at the 1- and 3-positions and a carboxy substituent at the 5-position; the cyclic anhydride formed from the carboxy groups at the 1- and 2-positions of trimellitic acid. | trimellitic anhydride |