Lithium hexafluoroarsenate(V) is an inorganic salt with the chemical formula LiAsF₆. It is a white crystalline solid that is highly soluble in polar organic solvents. This compound is primarily known for its role as a conducting salt in non-aqueous electrolytes. Its most significant application is in the field of energy storage, specifically in lithium-ion batteries. LiAsF₆ serves as a lithium source and electrolyte solute, contributing to high ionic conductivity in organic carbonate-based electrolyte formulations. It has been studied as an alternative to more common salts like LiPF₆, offering advantages in terms of thermal stability and moisture sensitivity under certain conditions. However, concerns regarding the toxicity of arsenic have limited its widespread commercial adoption in consumer batteries. From a chemical synthesis perspective, LiAsF₆ is also utilized as a source of the non-coordinating hexafluoroarsenate anion (AsF₆⁻) in various research contexts. It can act as a weakly coordinating anion to stabilize reactive cationic intermediates or catalysts in organic and organometallic chemistry.