L-asparagine sodium chloride acetate, a new semi organic amino acid single crystal was grown by slow evaporation solution technique (SEST) at room temperature. LASCA crystal of size 6x17x3 mm3 was grown in 18-23 days. The crystallinity was checked and confirmed by Powder XRD studies. Its structure and space group were determined by single XRD study. The optical transmission study showed a lower UV cut off wavelength for LASCA crystal. The mechanical properties of the grown crystal were determined. The dielectric behaviors such as variation of dielectric constant, dielectric loss with frequency for various temperatures were reported. TGA and DTA results showed that LASCA was stable upto 102oC. The SHG efficiency of the crystal was found to be nearly 0.66 times that of standard KDP.
