Direct Red 89

synthetische3-Amino-4-methoxybenzenesulfonic acid diazo, and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupled to get A single accidentally nitrogen compounds. 4-Amino-5-hydroxynaphthalene-2,7-disulfonic aciddiazo, and 2-Amino-4-methylanisole coupling, get single accidentally nitrogen compounds B, and then A, B and aniline and 2,4,6-Trichloro-1,3,5-triazine condensation chlorine.