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The crystal structure of the title salt, C8H12N+·C4H3O4, consists of a 2,5-di­methyl­anilinium cation and an hydrogen maleate anion. In the anion, a strong intra­molecular O—H...O hydrogen bond is observed, leading to an S(7) graph-set motif. In the crystal, the cations and anions pack in alternating layers parallel to (001). The ammonium group undergoes inter­molecular N—H...O hydrogen-bonding inter­actions with the O atoms of three different hydrogen maleate anions. This results in the formation of ribbons extending parallel to [010] with hydrogen-bonding motifs of the types R44(12) and R44(18).
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