Used primarily as a reference standard in analytical laboratories for the detection and quantification of organophosphorus compounds, especially in environmental and biological samples. It helps in calibrating instruments such as gas chromatographs and mass spectrometers for accurate measurement of pesticide residues and their degradation products. Due to its reactivity, it is also employed in research settings to study phosphorylation reactions and nerve agent analogs under controlled conditions. Its standardized concentration ensures reproducibility and reliability in analytical methods.