Fluorinert FC-40 is a non-conductive liquid composed of a mixture of fluorinated compounds. It is primarily used as a coolant and heat-transfer fluid in electronic devices, especially in high-performance computer systems and electronic components that generate significant heat. The compound's properties, such as low viscosity, high thermal stability, and excellent dielectric strength, make it ideal for these applications. Additionally, it serves as an inert solvent in chemical reactions and a lubricant in mechanical systems.