144832-55-3 Ethanedioic acid,compounds,mixt. with aminomethyl[[4-[(sulfophenyl)amino]phenyl][4- [(sulfophenyl)imino]-2,5-cyclohexadien-1- ylidene]methyl]benzenesulfonic acid disodium salt and 7-hydroxy-8-(phenylazo)-1,3- naphthalenedisulfonic acid disodium salt