Catsyn offer gram to tons of 2',5'-Bis((4-aminophenyl)ethynyl)-[1,1':4',1''-terphenyl]-4,4''-dicarbaldehyde | CAS 2375652-87-0, its formula is C36H24N2O2, molecular weight is 516.59g/mol and the purity is usually NLT 98%.