potassium hydroxide; sulfuric acid; hydroxylammonium sulfate 1.) 40-45 deg C, 50 min, 2.) reflux, 1 h; Yield given. Multistep reaction. Yields of byproduct given;

1: 1.) NH2OH*H2SO4, aq. KOH, 2.) 5N H2SO4 / 1.) 40-45 deg C, 50 min, 2.) reflux, 1 h 2: 87 percent / conc. H2SO4 / 0.03 h / 5 °C 3: 1.) NH2OH*H2SO4, aq. KOH, 2.) 5N H2SO4 / 1.) 40-45 deg C, 50 min, 2.) reflux, 1 h View Scheme

potassium hydroxide; sulfuric acid; hydroxylammonium sulfate 1.) 40-45 deg C, 50 min, 2.) reflux, 1 h; Yield given. Multistep reaction. Yields of byproduct given;