Pyromellitic acid Pyromellitic acid Synonyms: USAF xr-20;usafxr-20;BUFFER SOLUTION, PH 7.7;BENZENE-1,2,4,5-TETRACARBOXYLIC ACID;BENZENE-1,2,4,5-TETRACARBOXYLIC ACID HYDRATE;AKOS AUF2102;1,2,4,5-TETRACARBOXYBENZENE;1,2,4,5-BENZENETETRACARBOXYLIC ACID CAS NO.: 89-05-4 Formula: C10H6O8 Weight: 254.14984