Acid Brown 97

Copper 4-[[2,4-dihydroxy-3-[(2-hydroxy-3,5-dinitrophenyl)azo]phenyl]azo]benzenesulfonate sodium complexes

Copper, 4-(2-(2,4-dihydroxy-3-(2-(2-hydroxy-3,5-dinitrophenyl)diazenyl)phenyl)diazenyl)benzenesulfonate sodium complexes