2-Naphthalenesulfonic acid, 3-((2,5-dimethyl-4-sulfophenyl)azo)-4-hydroxy-7-((2,5,6-trichloro-4-pyrimidinyl)amino)-, disodium salt 2-Naphthalenesulfonic acid, 4-hydroxy-3-((2,5-dimethyl-4-sulfophenyl)azo)-7-((2,5,6-trichloro-4-pyrimidinyl)amino)-, disodium salt 68214-67-5