Butane-1,2,3,4-tetracarboxylic acid dihydrate

Abstract

The asymmetric unit of the title compound, C8H10O8·2H2O, contains one half-molecule of butane-1,2,3,4-tetracarboxylic acid and a water molecule, with the complete tetra-acid generated by crystallographic inversion symmetry. Intermolecular O—H...O hydrogen bonds form an extensive three-dimensional network, which consolidates the crystal packing.