The crystal structure of the coordination compound Na[RuNOCl 3 (H 2 O)OH]2H 2 O is reported. The complex is studied by IR and NMR spectroscopy, powder and single crystal X-ray diffraction. Crystallographic data determined for H 7 Cl 3 NNaO 5 Ru is: a = 6.648(2) Å, b = 8.216 (7) Å, c = 10.063(3) Å, D = 89.75(6)q, E = 70.96(2)q, J = 78.76(5)q, V = 967.9(2) Å 3 , P1 space group, Z = 4, d x = 2.165 g/cm 3 .