Thermophysical properties of alternate PUREX/UREX extractant tri-iso-amyl phosphate (TiAP) in different diluents are not available
in literature. In this study, density, viscosity and refractive indices of 36% v/v TiAP solutions (~1.1 M) in C6–C16n-alkanes, benzene, toluene, carbon tetrachloride and iso-octane at 298.15 K and 0.1 MPa have been measured experimentally. In the case of n-alkanes, these properties were correlated by empirical functions of carbon number of diluents. In addition, for 36% TiAP
and 100% TiAP solutions, nitric acid extraction studies were also performed and acid uptakes as well as thermophysical properties
of equilibrated phases were also measured. Compositions of solvates in equilibrated organic phases were also proposed.