A number of carboxypropyl- terminated poly(siloxane)s were prepared using equilibration polymerization reactions. Dimethyldichlorosilane hydrolysate, DDSH, was applied as a substitute for the otherwise used cyclic siloxane monomers. As DDSH contains dropSi-OH end-groups, it was of interest to analyze the obtained linear polymers with regard to the kind and amount of their terminating units. In order to clarify this question, the IR and H-1 NMR spectroscopy, end-group analysis, vapor pressure osmometry and GPC detection methods were used. All the results showed that the polymers obtained from DDSH were carboxypropyl- terminated.