Disodium 4,4'-[(2,4-dihydroxy-1,3-phenylene)bis(azo)]bisnaphthalene-1-sulphonate; Fenazo Brown N; Brown RD; Acid Brown GR; Acid Brown RX; Echt Brown N; echtbrown; ACID BROWN M; Pacid Brown RD; Sodium 4,4'-((2,4-dihydroxy-1,3-phenylene)bis(diazene-2,1-diyl))bis(naphthalene-1-sulfonate)
