16521-34-9 61725-47-1 68782-96-7 Cuprate(2-), bis(3-(hydroxy-kappaO)-4-(phenylazo)-2-naphthalenecarboxylato(2-)-kappaO)-, dihydrogen Cuprate(2-), bis(3-hydroxy-4-(phenylazo)-2-naphthalenecarboxylato(2-))-, dihydrogen Dihydrogen bis(3-hydroxy-4-(phenylazo)naphthalene-2-carboxylato(2-))cuprate(2-) EINECS 240-588-8