The 1H-Benzimidazolium Hydrogen L-Tartrate Dihydrate (BT) was synthesized using benzimidazole and L-tartaric acid and grown as single crystal by slow evaporation solution growth technique at room temperature (RT) using double-distilled water as a solvent. The crystal system has been confirmed from the single crystal X-ray diffraction (XRD) and powder XRD analyses. Morphology of the grown BT crystal was obtained using WinXMorph software package. Photoluminescence (PL) and UV-Visible (UV-Vis) spectral studies were performed. The functional groups present in the material were identified from Fourier transform infrared (FT-IR) spectroscopy. The thermal stability of the crystal was studied by TG-DTA (Thermalgravimetry analysis and Differential Thermal Analysis). The dielectric behavior was analyzed both as a function of frequency and temperature. The mechanical strength of the grown crystal was studied with Vickers microhardness tester. The growth patterns were analyzed after etching the surface of the crystal. The second harmonic generation (SHG) of BT was tested by Kurtz-Perry powder technique.