2,2''-((2,2'-Dichloro-4,4'-biphenylylene)bis(azo))bis(4'-chloro-2',5'-dimethoxyacetoacetanilide) 20139-72-4 Acetoacetanilide, 2,2''-((2,2'-dichloro-4,4'-biphenylylene)bis(azo))bis(4'-chloro-2',5'-dimethoxy- EINECS 243-543-0