73513-82-3 Cuprate(4-), (mu-(4-hydroxy-7-(4-((2-hydroxyethyl)amino)-6-((5-hydroxy-6-((2-hydroxy-4-sulfophenyl)azo)-7-sulfo-2-naphthalenyl)amino)-1,3,5-triazin-2-yl)-3-((2-hydroxy-4-sulfophenyl)azo)-2-naphthalenesulfonato(8-)))di-, tetrasodium EINECS 277-520-1