The heat capacities of chrysanthemic acid in the temperature range from 80 to 400 K were measured with a precise automatic
adiabatic calorimeter. The chrysanthemic acid sample was prepared with the purity of 0.9855 mole fraction. A solid-liquid
fusion phase transition was observed in the experimental temperature range. The melting point, Tm, enthalpy and entropy of fusion, ΔfusHm, ΔfusSm, were determined to be 390.7410.002 K, 14.510.13 kJ mol-1, 37.130.34 J mol-1 K-1, respectively. The thermodynamic functions of chrysanthemic acid, H(T)-H(298.15), S(T)-S(298.15) and G(T)-G(298.15) were reported with a temperature interval of 5 K. The TG analysis under the heating rate of 10 K min-1 confirmed that the thermal decomposition of the sample starts at ca. 410 K and terminates at ca. 471 K. The maximum decomposition
rate was obtained at 466 K. The purity of the sample was determined by a fractional melting method.