Milling yellow 3G (free acid)
milling yellow 3g (free acid)
An arenesulfonic acid that is 5-chloro-2-(pyrazol-1-yl)benzene-1-sulfonic acid in which the pyrazole ring is substituted by methyl, 4-(tosyloxy)phenyldiazenyl and hydroxy groups at positions 3, 4, and 5 respctively. The monosodium salt is the biological stain 'Milling yellow 3G'.