2,4,5-T PGBE ester 2,4,5-T PROPYLENE GLYCOL BUTYL ETHER ESTER 2,4,5-T Propylene glycol butyl ester 2,4,5-Trichlorophenoxyacetic acid propylene glycol butyl ester 28880-66-2 56288-03-0 62922-39-8 Acetic acid, (2,4,5-trichlorophenoxy)-, ester with butoxypropanol Pgbe 2,4,5-T