1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-((p-(phenylazo)phenyl)azo)-, (C15-C23)alkylamine salt (1:2) 68155-30-6 Amines, C15-23-sec-alkyl, 7-hydroxy-8-((4-(phenylazo)phenyl)azo)-1,3-naphthalenedisulfonate (2:1)