Isotope labelled Disulfoton (D493695), which is an organophosphate acetylcholinesterase inhibitor (1) binding to muscarinic receptors (2), is most commonly used for its pesticidal & insecticidal properties in the agricultural industry. Disulfoton and degredation products may be found in soil (3). Drinking water contaminant candidate list 3 (CCL 3) compound as per United States Environmental Protection Agency (EPA), environmental, and food contaminants.