CAS:2420-87-3 Fuafua mole:C16H6O6 Molecular Weight:294.22 EINECS:219-342-9 upu uiga tutusa:3,3',4,4'-Biphenyltetracarboxylic dianhydride 97%; 4,4'-Biphthalic Anhydride (faʻamamaina e ala i le sublimation); 3,3'4,4'-Biphenyl tetracarboxylic acid dianhydride(s-BPDA); S-BDPA; S-BPDA; [5,5'-biisobenzofuran]-1,1',3,3'-tetrone; [5,5'-Biisobenzofuran]-1,1',3,3'-tetrone; 5,5'-Biisobenzofuran-1,1',3,3'-tetrone