Experimental

R factor = 0.032; wR factor = 0.087; data-to-parameter ratio = 12.5. In the structure of the title compound, C8H12NO C7H5O6S H2O, isolated from the reaction of 2-(4-amino-phenyl)ethanol with 5-sulfosalicylic acid, the cations form head-to-tail hydrogen-bonded chains through C11(9) anilinium N+—H Ohydroxyl interactions while the anions also form parallel but C11(8)-linked chains through carboxylic acid O— H Osulfonate interactions. These chains inter-associate through a number of N+—H O and O—H O bridging interactions, giving a two-dimensional array in the ab plane. Related literature For the structure of the 2-(4-aminophenyl)ethanol salt of 3,5-dinitrobenzoic acid, see: Smith & Wermuth (2009). For structures of 5-sulfosalicylic acid salts of aniline and substi