1: 1) sodium nitrite, 1N HCl, 2) 50percent HCl, 5N NaOH / water, 0 deg C 2: sodium hydrosulphite, aq. NaOH / 0.5 h / 100 °C 3: 35.5 percent / 0.5 h / Heating View Scheme

1: sodium hydrosulphite, aq. NaOH / 0.5 h / 100 °C 2: 35.5 percent / 0.5 h / Heating View Scheme

0.5 h; Heating;