AbstractEngineering data for 1–15 molal aqueous solutions of LiOH and LiNO3 are summarized. These data include values previously published in the literature, as well as new measurements for LiOH. Data on salt solubility, density, specific heat, thermal conductivity, viscosity, electrical conductivity, gas solubility, surface tension, heat of solution, vapor pressure, thermal expansion, compressibility and activity coefficient are presented, with emphasis on temperatures between 20–100°C.