The thermo-physical properties of quaternary compound Cu2ZnSnS4 (CZTS) have been evaluated from high-quality single crystals grown by the solution method. The Debye temperature, one of the important properties, was determined from the measured heat capacity value below 7 K using the Debye function. The experimental Debye temperature is 302 K, which is a reference value for the thermo-physical understanding of CZTS. The present result can be used to stimulate future experimental and theoretical work. (C) 2013 Elsevier B.V. All rights reserved.