Sodium 9,10-Dimethoxyanthracene-2-sulfonate is primarily used as a fluorimetric ion-pair reagent for the detection and quantification of amines. Its application is significant in analytical chemistry, where it facilitates the sensitive and selective determination of amine compounds in various samples. The reagent forms ion-pair complexes with amines, which can then be measured using fluorescence spectroscopy. This method is particularly useful in pharmaceutical analysis, environmental monitoring, and biochemical research, where precise measurement of amine concentrations is crucial. Its high sensitivity and specificity make it a valuable tool for detecting trace amounts of amines in complex matrices.