Catsyn offer gram to tons of 5,5'-((3,3',5,5'-Tetramethyl-[1,1'-biphenyl]-4,4'-diyl)bis(oxy))bis(isobenzofuran-1,3-dione) | CAS 150314-47-9, its formula is C32H22O8, molecular weight is 534.51g/mol and the purity is usually NLT 98%.