Used as a flux in analytical chemistry for decomposing refractory minerals and oxides, especially in sample preparation for spectroscopic analysis. Helps dissolve silicates, chromites, and other tough inorganic materials by lowering their melting points during fusion processes. Commonly employed in gravimetric and volumetric analysis to bring samples into solution. Also utilized in metal cleaning and surface treatment processes due to its ability to remove oxides from metal surfaces at elevated temperatures. Plays a role in the synthesis of catalysts and ceramic materials where controlled sulfate release is required.