Catsyn offer gram to tons of N2,N4-DI([1,1'-biphenyl]-4-YL)-9,9-dimethyl-N2,N4-diphenyl-9H-fluorene-2,4-diamine | CAS 1799917-71-7, its formula is C51H40N2, molecular weight is 680.88g/mol and the purity is usually NLT 98%.