Used as a flux in sample preparation for X-ray fluorescence (XRF) and atomic absorption spectroscopy, enabling accurate analysis of minerals and metals by dissolving refractory oxides. Also employed in the production of specialty glasses and ceramics due to its ability to lower melting temperatures and improve thermal stability. Plays a role in electrochemical applications, including as a component in certain molten salt systems for energy storage. Additionally, utilized in environmental labs for fusing soil and ore samples to determine heavy metal content.