tris[2-ethyl]phosphite

tris[2-(2,4-dichlorophenoxy)ethyl]phosphite

[¦tris ¦tü ¦tü ¦fȯr dī¦klȯr·ō·fə¦näk·sē ¦eth·əl ′fä‚sfīt]
(organic chemistry)
C24H21Cl6O6P A dark liquid that boils above 200°C; used as a preemergence herbicide for corn, peanuts, and strawberries. Abbreviated 2,4-DEP.