2,4,5-T butyric acid 2,4,5-TB 4-(2,4,5-Trichlorophenoxy)butyric acid 4-06-00-00988 (Beilstein Handbook Reference) 93-80-1 BRN 2465419 Butanoic acid, 4-(2,4,5-trichlorophenoxy)- (9CI) Butyric acid, 4-(2,4,5-trichlorophenoxy)- Caswell No. 881X EINECS 202-278-0 EPA Pesticide Chemical Code 481800 NSC 102787 gamma-(2,4,5-Trichlorophenoxy)butyric acid