N-Hydr­oxy-4,5-dimethyl­thia­zole-2(3H)-thione hemihydrate

The geometry of the title compound, C₅H₇NOS₂·0.5H₂O, is characterized by a planar N,S-heterocyclic core that is distorted from a regular penta­gon. Solvent water participates in non-chelated hydrogen bonds and acts as a twofold donor (O—H...S=C) and a twofold acceptor [O...H—O(—N)].