Used primarily as a reference standard in analytical laboratories for the quantification and detection of diphenamid residues in environmental and agricultural samples. Commonly applied in quality control and calibration procedures for chromatographic techniques such as HPLC and GC-MS to ensure accurate measurement of herbicide levels in soil, water, and crops. Also utilized in research settings to study the degradation, persistence, and environmental impact of diphenamid as a pre-emergent herbicide.