Synonyms: 4H-3,1-Benzoxazin-4-one,2,2'-p-phenylenebis- (8CI);2,2'-(1,4-Phenylene)bis(4H-3,1-benzoxazin-4-one);2,2'-(1,4-Phenylene)bis[3,1-benzoxazin-4-one];2,2'-p-Phenylenebis(3,1-benzoxazin-4-one);2,2'-p-Phenylenebis[4H-3,1-benzoxazin-4-one];CEi-P;CEi-P-A;Cyasorb UV 3638;Pionin ZA 101;