2,7-Naphthalenedisulfonic acid, 5-amino-3-((4-(2-(4-((7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo)-2-sulfophenyl)ethenyl)-3-sulfophenyl)azo)-4-hydroxy-, lithium sodium salt, compd. with 2,2'-(methylimino)bis(ethanol) 83783-96-4 EINECS 280-832-0