chlorosulfonic acid T=65 - 70°C; 1 h;

1.1: methanol / 0 - 5 °C 1.2: 36 percent / H2SO4 / 85 - 90 °C 2.1: 78 percent / H2SO4; HNO3 / 90 - 95 °C 3.1: SOCl2 3.2: 86 percent / NH4OH; water / 3 h / 20 °C 4.1: HCl; SnCl2; water / 20 °C 4.2: 90 percent / NaOH; water 5.1: 30 percent / polyphosphoric acid / Heating 6.1: 92 percent / chlorosulfonic acid / 1 h / 65 - 70 °C View Scheme

1: 30 percent / polyphosphoric acid / Heating 2: 92 percent / chlorosulfonic acid / 1 h / 65 - 70 °C View Scheme

1: 30 percent / polyphosphoric acid / Heating 2: 92 percent / chlorosulfonic acid / 1 h / 65 - 70 °C View Scheme

1.1: 78 percent / H2SO4; HNO3 / 90 - 95 °C 2.1: SOCl2 2.2: 86 percent / NH4OH; water / 3 h / 20 °C 3.1: HCl; SnCl2; water / 20 °C 3.2: 90 percent / NaOH; water 4.1: 30 percent / polyphosphoric acid / Heating 5.1: 92 percent / chlorosulfonic acid / 1 h / 65 - 70 °C View Scheme

1.1: HCl; SnCl2; water / 20 °C 1.2: 90 percent / NaOH; water 2.1: 30 percent / polyphosphoric acid / Heating 3.1: 92 percent / chlorosulfonic acid / 1 h / 65 - 70 °C View Scheme

1.1: SOCl2 1.2: 86 percent / NH4OH; water / 3 h / 20 °C 2.1: HCl; SnCl2; water / 20 °C 2.2: 90 percent / NaOH; water 3.1: 30 percent / polyphosphoric acid / Heating 4.1: 92 percent / chlorosulfonic acid / 1 h / 65 - 70 °C View Scheme

1: 34 percent / polyphosphoric acid / Heating 2: 92 percent / chlorosulfonic acid / 1 h / 65 - 70 °C View Scheme