Used as a laboratory reagent in analytical chemistry for qualitative analysis, particularly in tests for cations like barium and lead due to its ability to form insoluble sulfates. Commonly employed in educational settings for crystallization experiments because it forms large, well-defined crystals. Also utilized in dyeing and textile processing as a leveling agent to ensure even dye distribution. Serves as a source of sulfate ions in chemical synthesis and in the preparation of buffer solutions. Occasionally used in the manufacturing of detergents and water treatment processes to adjust ionic strength.