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

In the title compound, C(13)H(19)ClN(3)O(3) (+)·ClO(4) (−), 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.