2-sec-Butyl-1-(2-hy-droxy-eth-yl)-1H-benzimidazole-5-carboxylic acid.

In the title compound, C(14)H(18)N(2)O(3), the carb-oxy-lic group is tilted by 12.00†(4)° with respect to the mean plane throught the benzimidazole ring system. The alcohol and carboxyl hydroxy groups are involved in intermolecular O-H⋯O and O-H⋯N hydrogen bonds, forming a two-dimensional network extending parallel the ab plane. The network is further stabilized by weak C-H⋯O inter-actions. The sec-butyl group is disordered over two sets of sites with refined occupancies of 0.484†(4) and 0.516†(4).