Intermediate
- 2-chloro-5-nitrobenzenesulphonic acid
- 2-Aminophenol-4-(2-carboxy)sulfonanilide
- 2-Amino-4-chloro-5-nitrophenol
- 2-amino-3-nitro phenol
- 1-Aminoanthraquinone
- 5-Nitro-2-aminophenol
- 1,2-Naphthoxydiazo-4-sulfonic acid（oxygen）
- 4-Amino-3-hydroxy-1-naphthalenesulfonic acid
- 2-amino-5-nitrobenzene sulphonic Acid
- Sulfanilic acid