2-[4-[4-[8-(2,4-Diamino-5-nitrophenylazo)-1-hydroxy-5-sulfo-2-naphthalenylazo]-6-sulfo-1-naphthalenylazo]-1-naphthalenyl]-1,4-benzenedisulfonic acid | 2-[4-[4-[8-(2,4-Diamino-5-nitrophenylazo)-1-hydroxy-5-sulfo-2-naphthalenylazo]-6-sulfo-1-naphthalenylazo]-1-naphthalenyl]-1,4-benzenedisulfonic acid | |