The particle-size of sulphadiazine produced by a solvent-change method

Abstract
The factors affecting the particle-size of sulphadiazine produced by a solvent-change method of crystallization have been studied. The most important variables appear to be the degree of turbulence in the pipeline mixer used for the crystallization process, and the concentration of drug in the dimethylformamide injection solution. Mechanisms which can account for these, and other features of this crystallization method, are presented.