Used as a high-performance fluid in oil and gas drilling operations due to its ability to stabilize wellbore conditions in high-pressure, high-temperature environments. Its low viscosity and high solubility make it ideal for use in completion and workover fluids, minimizing formation damage and enhancing well productivity. Also employed in heat transfer systems and as a density modifier in specialty industrial applications where non-corrosive, environmentally tolerant solutions are required.

Additionally, it finds use in laboratory research, such as in organic synthesis requiring alkali metal cation catalysts, or as a source of rubidium in materials science applications, including the production of specialty crystals or electronic devices needing specific electrical properties.

There are also experimental studies in specialized medical fields, such as radiation imaging techniques or cell biochemistry research, though these applications are not yet widespread.