2,4,5-T
What is 2,4,5-T? 2,4,5-T was once applied as either an aqueous salt or as an oil-soluble ester. Ester forms of 2,4,5-T and 2,4-D were used as defoliants in the Vietnam War (e.g., Agent Orange) and concern about contamination with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) led to the discontinuation of 2,4,5-T use as a herbicide in 1985.