Used as a reference standard in pesticide analysis for the detection and quantification of phenolic compounds in environmental and agricultural samples. It serves as a derivatized form of 4-nitrophenol, enhancing stability and solubility in aqueous-based analytical methods. Commonly employed in spectrophotometric and chromatographic techniques to monitor pesticide degradation products, especially in studies involving organophosphate and carbamate pesticides. Its well-defined reactivity and detectable absorbance make it valuable for calibration and method validation in quality control laboratories.