1,3'-Bipyridinium, 5'-((4-((4-((1',2'-dihydro-6'-hydroxy-3,4'-dimethyl-2'-oxo(1,3'-bipyridinium)-5'-yl)azo)benzoyl)amino)phenyl)azo)-1',2'-dihydro-6'-hydroxy-3,4'-dimethyl-2'-oxo-, salt with 2-hydroxypropanoic acid (1:2) 75214-63-0 EINECS 278-130-4 Pyridinium, 1,1'-((iminocarbonyl)bis(4,1-phenylene)bis(azo)bis(1,2-dihydro-6-hydroxy-4-methyl-2-oxo-3,5-pyridinediyl))bis(3-methyl-, bis(lactate)