1-Naphthalenediazonium, 4-(phenylazo)-7-sulfo-, hydroxide, inner salt 1-Naphthalenediazonium, 4-(phenylazo)-7-sulfo-, inner salt 4-(Phenylazo)-7-sulphonatonaphthalene-1-diazonium 66375-40-4 EINECS 266-338-8