摘要： Nonlinear optical (NLO) 2, 4-Dinitrophenylhydrazine (DNPH) single crystal was grown by slow evaporation solution growth method at ambient temperature. The characterization of Powder X – Ray diffraction peaks was con?rmed the new crystalline system. Fourier transform infrared spectroscopic analysis (FTIR) was used to the identi?cation of various functional groups present in the grown crystal. The range of optical transmittance exhibited by the grown bCD-DNPH crystal was investigated by UV Visible – NIR spectral analysis. The lower cut off wavelength of the grown crystal is observed at 270 nm. The SEM ?gures are recorded in different magni?cation. It is clear that the surface of the grown crystal appears very smooth although it has pots and microcrystal on the surface. The grain boundaries are clearly seen which shows the perfect growth of the crystal. The weight percentage (wt %) of C, N and O as obtained from EDAX analysis is in concurrent with the theoretical values. The SHG ef?ciency of the grown crystal was determined.