2,4,5-trichlorophenoxyacetic acid


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2,4,5-trichlorophenoxyacetic acid

[¦tü ¦fȯr ¦fīv trī¦klȯr·ō·fə¦näk·sē·ə¦sēd·ik ′as·əd]
(organic chemistry)
C6H2Cl3OCH2CO2H A toxic, light-tan solid; soluble in alcohol, insoluble in water; melts at 152°C; used as a defoliant, plant hormone, and herbicide. Also known as 2,4,5-T.
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A realistic hypothesis is that water and food have been contaminated with 2,3,7,8-TCDD from use of 2,4,5-trichlorophenoxyacetic acid (a component of Agent Orange), a phenoxy acid herbicide that often contains dioxin and related compounds as impurities.
The unique congener pattern [TCDD was the major (70-80%) contributor to the toxic equivalent (TEQ) (38,39)] suggested that the community was exposed to a TCDD-contaminated stock of the herbicide 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), similar to the defoliant Agent Orange that was used in Vietnam.