Furantetracarboxylic acid

In chemistry, furantetracarboxylic acid is an organic compound with formula, or (C4O)(-(CO)OH)4, which can be viewed as deriving from furan through replacement of the four hydrogen atoms by carboxyl functional groups -(CO)OH.

By removal of four protons, the acid is expected to yield the anion, furantetracarboxylate, which is one of the oxocarbon anions (consisting solely of oxygen and carbon. By loss of 1 through 3 protons it forms the anions , , and , called respectively trihydrogen-, dihydrogen-, and hydrogenfurantetracarboxylate. The same names are used for the corresponding esters.

The acid can be obtained by from dioxalylsuccinate.

The salt rubidium trihydrogenfurantetracarboxylate  crystallizes as white needles.