Used as a laboratory reagent in analytical chemistry for qualitative analysis, particularly in tests for cations such as barium and lead due to its ability to form insoluble sulfate precipitates. Also employed in educational settings for crystal growth experiments because it readily forms large, well-defined crystals from aqueous solutions. Serves as a source of sulfate ions in synthesis and precipitation reactions. Additionally, utilized in some industrial processes where a soluble sulfate salt is required under neutral or slightly alkaline conditions.