2,3,6-Trichlorobenzoic Acid 
Compared to most herbicides, 2,3,6-trichlorobenzoic acid has been 
found to be much more stable in soil (Dewey, 1959; Phillips, 1959). 
Studies with biologically active soil showed that this material was 
degraded with release of inorganic chloride. No intermediates were 
identified (Dewey, 1962). 
When fed to rabbits and mice, 17.6% and 2.7%, respectively, of the 
2,3,6-trichlorobenzoic acid fed was excreted (Balayannis et al., 1965a). 
Studies with other benzoic acids have shown that, when fed to animals, 
they are excreted in urine either unchanged or as conjugates of glycine 
and glucuronic acid (Williams, 1959; Hildebrandt, 1903; Novello et al., 1926). 
Trichlorophenoxyacetic Acids 
2,4;,;5-T = 2,4,5-Trichlorophenoxyacetic acid 
2,4,6-T = 2,4,6-Trichlorophenoxyacetic acid 
Studies showed that 2,4,5-T was decarboxylated by woody plants 
(Basler, 1964). 
After exposure of the oat Avena sativa to 2,4,6-T, hydroxylation 
occurred at the 3-position and a glucoside was isolated and identified 
(Thomas et al., 1964b). 
‘e) O 
‘e) 4 
0O-CH c7 0-CHy -c% o-cH- 
oa) Nou OH 
OH 1 C Cl 
Cl 1 Ch 
——— pe —_—_——— 
H O0-Glucoside 
1 1 
Cl 
2,4,6-Trichloro- 
phenoxyacetic Acid 
166 
