TCI C0493 cis-4-Cyclohexene-1,2-dicarboxylic Anhydride (CAS 935-79-5) is a cyclic dicarboxylic anhydride widely used as a non-heterocyclic building block in organic synthesis laboratories. Its reactive anhydride group readily undergoes ring opening with amines and alcohols to give imides, amides, and ester derivatives, while the ring double bond allows further functionalization. Researchers commonly apply it in the preparation of specialty monomers, polyester and polyimide precursors, and thermoset resin studies. The material should be kept tightly closed in a cool, dry place away from moisture, and handled with appropriate personal protective equipment in a fume hood.
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