Zinc Tris-thiourea Sulphate (ZTS) belongs to the family of semiorganics nonlinear optical materials. Good quality single crystal of pure and doped ZTS have been grown by slow evaporation solution growth technique at room temperature. The grown crystals have been subjected to FTIR and UV visible spectra studies. The Fourier Transform Infrared analysis confirms the presence of functional groups and zinc coordination in grown crystals.