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Abstract: The bulk single crystals of S=1 chain compound Ni(C3H10N2)2NO2ClO4 are grown by using a slow evaporation method at a constant temperature and a slow cooling method. It is found that the optimum condition of growing large crystals is via slow evaporation at 25°C using 0.015mol , 0.015mol NaNO2, and 0.03mol 1,3-propanediamine liquid dissolved into 30ml aqueous solvent. High-quality crystals with size up to mm3 are obtained. The single crystals are characterized by measurements of X-ray diffraction, magnetic susceptibility, specific heat and thermal conductivity. The susceptibilities along three crystallographic axes are found to exhibit broad peaks at , and then decrease abruptly to zero at lower temperatures, which is a characteristic of a Haldane chain system. The specific heat and the thermal conductivity along the c-axis can be attributed to the simple phononic contribution and are analyzed using the Debye approximation. [Copyright &y& Elsevier]