(3-{[N-(5-Chloro-2-hy­droxy­phen­yl)oxamo­yl]amino}­prop­yl)dimethyl­aza­nium perchlorate

In the title compound, C₁₃H₁₉ClN₃O₃⁺·ClO₄⁻, the 3-(di­meth­yl­ammonio)­propyl group of the cation is disordered over two sets of sites with occupancies 0.772 (6) and 0.228 (6). The cations are joined by pairs of N—H...O hydrogen bonds into centrosymmetric dimers and these dimers are assembled into chains along the a-axis direction, also through N—H...O hydrogen bonds. The perchlorate anions are linked to the hy­droxy groups of the cations by O—H...O hydrogen bonds. The positively charged ammonium groups and the anions give rise to folded layers parallel to the ab plane.