1,3,6-Naphthalenetrisulfonic acid, 7-hydroxy-8-((p-(phenylazo)phenyl)azo)-, (C15-C23)alkylamine salt (1:3) 68155-34-0 Amines, C15-23-sec-alkyl, 7-hydroxy-8-((4-(phenylazo)phenyl)azo)-1,3,6-naphthalenetrisulfonate (3:1)