2,7-Naphthalenedisulfonic acid, 4-hydroxy-5-((4-((4-((2-hydroxyethyl)amino)-6-((5-hydroxy-6-((2-methoxy-5-sulfophenyl)azo)-7-sulfo-2-naphthalenyl)amino)-1,3,5-triazin-2-yl)amino)-5-methoxy-2-methylphenyl)azo)-, monosodium salt 94944-83-9 EINECS 305-661-1