The present invention relates to a method for manufacturing soap from fatty and resin acids, in particular from tall oil fatty acid comprising resin acids. The method is based on a process in which the water conventionally utilized for saponification is partially replaced with a solvent that decreases the viscosity of the reaction mixture and results in a high dry matter content of the reaction product. An object of the invention is also a composition comprising fatty and resin acid soap and its use as a disinfectant or antiseptic agent.
