Non linear optical crystals L-Alanine Cadmium Chloride (LACC) and sodium admixed LACC have been grown as semi-organic single crystals using the slow evaporation crystal growth process at pH 5.0. Densities of the crystals are measured using Flotation method. The host lattice of LACC has sodium compounds, according to the Atomic Absorption Spectroscopy (AAS) technique and Energy Dispersive X-ray (EDAX) Analysis. From the Single Crystal X-ray Diffraction (SCXRD) studies, the crystalline structure and associated crystallographic axes were calculated. To distinguish between the various functional groups present Fourier transform infrared (FTIR) spectroscopic method is applied. Thermo gravimetric analysis determines the thermal properties of the pure and sodium admixed LACC crystal. The micro hardness test is used to determine the nature of the formed crystals. Absorbance percentage of sodium mixed LACC crystals were recorded using Ultra -Violet Spectrophotometer instrument and the calculated optical band gap confirms that the crystals are insulators. Using Nd-YAG LASER source, non linear optical phenomena of the prepared crystals was confirmed and sodium doped LACC crystals shows higher Second Harmonic Generation (SHG) efficiency than the pure LACC crystal. Dielectric properties were reported using the dielectric studies and found that the AC activation energy is higher at 100 Hz.