Cat. Name CAS. Structure Purity
M071554 7-hydroxy-8-[[4/'-[(4-hydroxyphenyl)azo][1,1/'-bip 117-33-9 7-hydroxy-8-[[4/'-[(4-hydroxyphenyl)azo][1,1/'-biphenyl]-4-yl]azo]naphthalene-1,3-disulphonic acid ≥ 95%