Trimellitic anhydride
# Trimellitic anhydride

Trimellitic anhydride is an organic compound with the formula $HO_2CC_6H_3(C_2O_3).$ It is the cyclic anhydride of trimellitic acid. Several thousand tons of this colorless solid are produced annually as a precursor to plasticizers for polyvinyl chloride. It is produced by air-oxidation of 1,2,4-trimethylbenzene.

