1-Phenol-2-sulfonic acid, 4-chloro-6-(2,4-dihydroxyphenylazo)- (6CI) 4386-25-8 5-Chloro-3-(2,4-dihydroxyphenylazo)-2-hydroxybenzenesulfonic acid BRN 1916900 Benzenesulfonic acid, 5-chloro-3-(2,4-dihydroxyphenylazo)-2-hydroxy- Lumogallion Lumogallion IREA NSC 102798