4-Nitrosodiphenylamine156-10-530 % similar 9,10-Dihydro-1,4-dihydroxy-9,10-dioxo-2-anthracenesulfonic acid145-48-230 % similar (1,1'-Biphenyl)-4,4'-disulfonic acid5314-37-430 % similar 2-Amino-1-naphthol-4-sulfonic acid567-13-530 % similar 6-Aminonaphthalene-1-sulphonic acid81-05-030 % similar N-(4-Hydroxyphenyl)benzenesulfonamide5471-90-930 % similar Monopotassium 7-aminonaphthalene-1,3-disulfonate842-15-930 % similar