Oxon Residues in Exposures
Real-life exposures, contain variable levels of highly toxic oxon components. In the study by Ralls et al., the oxon content of the diazinon residues represented 17% of the total residue. In light of what is now known, it makes sense for safety tests to include a range of oxon contents that include percentages of oxon likely to be encountered in actual exposures.
[Ralls, J. W., Gilmore, D. R., and Cortes, A. 1966. Fate of radioactive O,O-diethyl O-(2-iso-propyl-4-methylpyridmidin-6-yl) phosphorothioate on field-grown experimental crops. J. Agric. Food Chem. 14:387–392.]