A mycobactericidal composition is provided, comprising: a synergistic combination of a water miscible monohydric alcohol and benzoic acid; optionally, surfactant at a concentration less than about 1%; and water, A method for disinfecting a surface using the foregoing composition is also provided. The mycobatericidal compositions may be used for inactivating mycobacteria, bacteria vim or fungi. In one embodiment, the composition of the invention is used for reconditioning a soiled endoscope.