Abstract: Excess thermodynamic functions at temperatures close to 273.15 K are calculated for C₆₀(R)_n–H₂O and C₇₀(R)_n–H₂O binary systems based on adducts of light fullerenes C₆₀ and C₇₀ with amino acids. An asymmetric model of virial decomposition (VD-AS) is described. The diffusion stability, association, and electrokinetic potentials of the adducts in aqueous solutions are investigated. The volumetric and refractive properties (concentration dependences of density, and averaged and partial molar volumes and refractions) are described in the binary systems and C₇₀(R)_n–H₂O. Regions of diffusion stability are calculated, and the sizes and electrokinetic potentials of associates in solutions are determined. The polythermic solubility in the binary systems and the isothermal solubility in ternary systems that include C₆₀(R)_n and C₇₀(R)_n fullerene adducts are studied. The transport properties (viscosity and electrical conductivity) in C₆₀(R)_n–H₂O and C₇₀(R)_n–H₂O binary systems are described.