(1,1'-Biphenyl)-2,2'-disulfonic acid, 4,4'-bis((2-oxo-1-((phenylamino)carbonyl)propyl)azo)- 37678-92-5 4,4'-Bis((2-oxo-1-((phenylamino)carbonyl)propyl)azo)(1,1'-biphenyl)-2,2'-disulphonic acid EINECS 253-622-1