Tin(II) fluorophosphate (Sn₂FPO₄, CAS 52262-58-5) is an inorganic compound characterized by its unique layered crystal structure. It belongs to a class of materials where fluorine and phosphate anions are coordinated with tin(II) cations, resulting in specific ionic conductivity properties. Its primary application is in the field of energy storage, where it is investigated as a potential solid-state electrolyte or electrolyte additive for lithium-ion and sodium-ion batteries. The material's structure may facilitate ion transport. Additionally, tin(II) fluorophosphate has been studied as a precursor or active component in the synthesis of heterogeneous catalysts, particularly for organic oxidation and coupling reactions, leveraging the redox activity of Sn(II)/Sn(IV). Handling requires caution due to the potential toxicity of tin and fluorine compounds. It is typically a moisture-sensitive solid and should be stored under inert conditions. Research on this material is primarily focused on its functional properties for advanced technological applications rather than its use as a common chemical reagent.