1,4-Diamino-2-nitrobenzene
1-Naphthol
2,4-Dimethylaniline-6-sulfonic Acid
2,4-Quinolinediol
2-(4-Aminoanilino)-5-nitrobenzenesulphonic Acid
2-Amino-4,6-dichlorophenol
2-Amino-4-chlorophenol-6-sulfonic Acid
2-Aminophenol-4-Sulfonmethylamide
2-Chlorobenzoic Acid
3-Chloro-4-hydroxyaniline
4'-Aminoazobenzene-4-sulphonic Acid
4,4'-Diaminobenzenesulphanilide