sulfuric acid

sulfuric acid; sulfur trioxide T=35 - 115°C; 13 h; Product distribution / selectivity;

1: 2-(4-aminophenylsulfonyl)-ethylhydrogen sulfate With hydrogenchloride; sodium nitrite in water T=0 - 5°C; 2: 1-amino-8-hydroxy-naphthalene-3,6-disulfonic acid With sodium hydrogencarbonate in water pH=2 - 3;