Used as a flux in analytical chemistry for decomposing minerals and ores, especially in sample preparation for spectroscopic analysis. Helps in dissolving silicates and metal oxides by forming soluble sulfates. Commonly employed in gravimetric and volumetric analysis due to its ability to lower the melting point of mixtures. Also utilized in electroplating baths to maintain acidic conditions and improve conductivity. Acts as an acidifying agent in various industrial processes where a mild, controllable acidity is required.