Used primarily as an analytical reference standard in environmental and agricultural testing to detect and quantify pesticide residues. It serves as a key intermediate in the synthesis of organophosphorus compounds, particularly in the development of certain nematicides and insecticides. Due to its structural properties, it is also employed in research settings for studying enzyme inhibition, especially acetylcholinesterase activity, which helps in assessing neurotoxic effects of related compounds. Its stability and reactivity make it suitable for use in method validation and calibration in chromatographic techniques like GC-MS and HPLC.