The present work comprises of thermophysical properties of nitrate-based binary heat transfer fluids of various compositions. For various nitrate mixtures, specific heat, latent heat of fusion, and viscosity as a function of shear rate are reported at various temperatures. Phase diagrams have also been constructed for these binary mixtures using differential scanning calorimetry. It was found that the contribution of the lithium nitrate on the binary mixtures had the largest increase in specific heat. As with most fluids, viscosity significantly decreases with temperature. The latent heat of the binary mixtures cannot be determined by using simple mass-averaging. The results presented in this work are expected to make a significant impact on the development of economical and industrially viable nitrate mixtures for solar power applications.

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