Agent Orange is the name of a defoliant formulation used by the US military in Southeast Asia during the Vietnam War. Agent Orange was not a paraquat, diquat or mofamquat. It was a combination of two chlorphenoxy herbicides, 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), and 2,4-D (2,4-dichlorophenoxyacetic acid). In addition, some Agent Orange formulations were contaminated with TCDD (2,3,7,8-tetrachlorodibenzo-p-doixin, a toxic byproduct of 2,4,5-T production.