Tristhioureazinc(II) Sulphate (ZTS) is a potential semi-organic Non-linear optical material with high SHG efficiency, application in laser technology and photonic applications are grown as pure single crystals by slow evaporation solution growth technique, one of the best methods at room temperature by the crystallization process is further analyzed by single crystal XRD which infers that the ZTS crystal has an orthorhombic system. The surface morphology was studied by SEM. Powder XRD reveals an increase in the intensity of the peaks for pure ZTS crystal inferring some slight changes in structural parameters. FTIR reveals some slight variation in vibration frequencies and secondary vibrational bands found. UV-visible spectra show better transmittance with high optical properties, The SHG measurement shows the increased NLO efficiency for the ZTS specimen.