7-[(4-Aminophenyl)carbonylamino]-3-[[4-[(4-aminophenyl)carbonylamino]-2-sulfophenyl]azo]-4-hydroxy-2-naphthalenesulfonic acid disodium salt | 7-[(4-Aminophenyl)carbonylamino]-3-[[4-[(4-aminophenyl)carbonylamino]-2-sulfophenyl]azo]-4-hydroxy-2-naphthalenesulfonic acid disodium salt | |