<p dir="ltr">The authors worked as working group members in molten salt committee in FY 2020–2024 to collect the books and literatures devoted to the data of precious metal salts. They cover basic properties, phase stability, activity coefficient, complexes, and electrochemical data. Due to the easy decomposition of the compounds, several literatures report not their single properties but their properties in molten salts. We hope that this activity report contributes to the committee members developing the processes of production or recovery of precious metal using molten salts.</p>