Ruthenizer 535 Type : ruthenium dye Chemical Name : cis-diisothiocyanato-bis(2,2’-bipyridyl-4,4’-dicarboxylic acid) ruthenium(II) Molecular Formula : C26H16O8N6S2Ru Formula Weight : 741.7 g/mol (incl. 2 cryst. H2O) CAS Number : 141460-19-7 Aspect : dark purple powder