Solubility, metastable zonewidth and induction period have been estimated for the growth of sodium paranitrophenolate dihydrate (NPNa) single crystal. The interfacial energy has been calculated using experimentally determined induction period values. Nucleation parameters such as Gibbs free energy, critical energy barrier, radius, number of molecules in the critical nucleus and growth rate have been calculated. The evaluated interfacial tension values are found to be well agreed with the theoretical value derived from the solubility data. Bulk single crystals of NPNa have been grown with an aid of methanol as a solvent by slow evaporation technique. (C) 2007 Elsevier Ltd. All rights reserved.