Thermoanalytical measurements (DTG-DTA-MS), X-ray diffraction (XRD). temperature-programmed reduction (TPR), redox titration and X-ray photoelectron spectroscopy (XPS) were used to characterize A(1-x)Sr(x)MnO(3) perovskite catalysts (A = La, Nd, Pr, Di [didymium]). The catalyst samples were investigated before and after interaction with chloromethane in the temperature range between 300 and 650 degreesC. XRD and TPR measurements revealed the presence of oxide admixtures in samples calcined at 600 and 800 degreesC, resp.. in air. Crystallinity of the samples and the amount of oxide admixtures depend on the kind of A-site cations. Interaction of the perovskite samples with chlorinated hydrocarbons at reaction temperatures leads to a decrease of the specific surface areas: the perovskite structure is preserved. Redox titration and TPR measurements showed that the Mn(IV) content in the perovskites increases by partial substitution of La by Sr and decreases after interaction with chloromethane.