- Study of the solubility, viscosity and density in Na+, Zn2+/Cl- - H2O, Na+ - Zn2+ - (H2PO2)(-) - H2O, Na+, Cl-/(H2PO2)(-) - H2O, and Zn2+, Cl-/(H2PO2)(-) - H2O ternary systems, and in Na+, Zn2+/Cl-, (H2PO2)(-)//H2O reciprocal quaternary system at 273.15 K