Methyl Orange-xylene cyanol solution in water, pure 500ML

1,3-Benzenedisulfonic acid, 4-4-(ethylamino)-3-methylphenyl4-(ethylimino)-3-methyl-2,5-cyclohexadien-1-ylidenemethyl-, monosodium salt, compd. with sodium 4-4-(dimethylamino)phenylazobenzenesulfonate (1:1)

1,3-Benzenedisulfonic acid, 4-[[4-(ethylamino)-3-methylphenyl][4-(ethylimino)-3-methyl-2,5-cyclohexadien-1-ylidene]methyl]-, monosodium salt, compd. with sodium 4-[[4-(dimethylamino)phenyl]azo]benzenesulfonate (1:1)