Synthesis of 4-Amino-N-Ethyl-N-P-HydroxyethyIanilin Hemi-Sulfate Hydrate

4-Amino-N-ethyl-N-ı8~hydroxyethylaniline hemi-sulfate hydrate was synthesized by nitrosation of N-ethyl-N-p-hydroxyethylaniline, then reduced with zinc powder/ hydrochloric acid, without isolating of the nitroso compound. The amine salt so formed was basified with ammonia, then extracted with chloroform and the free base converted its hemi-sulfate hydrate directly, by adding a sufficient amount of sulfuric acid in ethanol.