Used as a selective collector in froth flotation processes for the separation of oxide and sulfide minerals, particularly in the beneficiation of rare earth ores and tin ores. Enhances the recovery of fine mineral particles by forming stable complexes with metal ions on mineral surfaces. Also applied in analytical chemistry for the spectrophotometric determination of metals such as iron, aluminum, and titanium due to its chelating properties. Shows potential in corrosion inhibition and as a reagent in organic synthesis for the preparation of sulfonamides and other sulfonyl-containing compounds.