Solubilities of CaCrO4 in water from 110 degreesC to 160 degreesC and aqueous sodium chromate solution from 25 degreesC to 80 degreesC were measured. From these data, activity coefficients were calculated and compared with Bromley's method. The results agree. The standard enthalpy of formation and standard Gibbs free energy of formation of CaCrO4 calculated through thermodynamic laws were compared with literature values. Recalculated values are Delta(f)H(CaCrO4, 298 K) 1401.2 kJ(.)mol(-1) and Delta(f)G(CaCrO4, 298 K) = -1299.4 kJ(.)mol(-1).