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In chemistry, 1,4-benzoquinonetetracarboxylic acid is an organic compound with formula C10H4O10, or OH]4, which can be viewed as deriving from para-benzoquinone C6H4O2 through replacement of the four hydrogen atoms by carboxyl functional groups -OH.
By removal of four protons, the acid is expected to yield the anion C10O10, benzoquinonetetracarboxylate, which is one of the oxocarbon anions. By loss of 1 through 3 protons, it forms the anions C10H3O10, C10H2O10, and C10HO10, called respectively trihydrogen-, dihydrogen-, and hydrogenbenzoquinonetetracarboxylate. The same names are used for the corresponding esters.
Removal of two water molecules gives the compound benzoquinonetetracarboxylic dianhydride, C10O8, one of the oxides of carbon.
The acid can be obtained by from durene via dinitropyromellitic anddiaminopyromellitic acids.