2,4-D and Related Compounds 
2,4,5-T [2,4,5-Trichlorophenoxyacetic Acid] 
Cows fed 2,4,5-T excreted it as a soluble salt in their urine (1259). 
When Winesap and Staymen Winesap cultivars were exposed to 2,4,5-T, 
some decarboxylation occurred (1181). Bean plants (Phaseolus), sun 
flowers (Helianthus annus) and barley (Hordeum) converted 2,4,5-T to its 
phenol (1559). 2,4,5-T was also decarboxylated by woody plants (93). 
From comparative studies with sensitive and insensitive plants, two 
paths were proposed, involving initial glucose ester formation and oxidative 
ring cleavage to yield monochloroacetate. The latter was detected in 
treated plants prior to the.onset of treatment symptoms (1436). 
Sweetgum (Liquidambar styraciflua L.) and southern red oak (Quercus 
falcata Michx.) were sprayed with an aqueous homogenate of 2,4,5-T n-butyl 
ester. After one month, leaves were collected and assayed using gas 
chromatography to detect residues. 2,4,5-Trichlorophenol was observed but 
no evidence was found to indicate formation of 2,4,5-Trichloranisol (460, 
461). After application to Bigleaf maple (Acer Macrophyllum Pursh) and 
mesquite seedlings, 2,4,5-T was metabolized but the products were not 
identified (1043, 1087). 
Triethanolamine salts of qi' -carboxy labeled 2,4,5-T were applied in 
water to the surface of some collected forest litter. Liberation of cl4o, 
was slow but increased with time (1086). 
2,4,5-TP (Silvex) [2-(2,4,5-Trichlorophenoxy)propionic Acid] 
When fed to cows, silvex was excreted as a soluble salt in the 
urine. Kuron, the propylene glycol butyl ether ester of silvex, was 
hydrolyzed prior to elimination (1259). 
Samples of fresh citrus peel were prepared by compositing peel 
samples obtained from oranges from trees sprayed with 2,4,5-TP 
propylene glycol butyl ether ester. In addition to free acid and ester, 
a conjugate was found. The latter became available for extraction only 
after heat treatment. Preliminary investigations indicated that 2,4,5-TP 
was conjugated with pectin (966). Decarboxylation of 2,4,5-TP by prickly 
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