1: 1-amino-6-nitrobenzene-4-sulphonic acid With sulfuric acid in water
T=5°C;
2: Ammonium thiocyanate; Cu(SCN)2 in water
T=0 - 20°C; 3 h;
3: With hydrogenchloride; iron in water
T=90 - 95°C;
参考文献
CLARIANT INTERNATIONAL LTD.
Patent: EP1424368 A1, 2004 ;
Location in patent: Page 8 ;
