Development of reliably and safety method of desinfection associated with a number of issues, in particular, theoretical and methodological nature. One of the main problem in developing such methods is their use only safe and reliable chemicals. That have not determinental effecton health of the dogs, service personnel, cynologist Despite the large number of works, about desinfectants are still acute the need to formulate new safe methods and improve already available solutions, about disinfection of service dog cages. This article describe the theoretical and practical principles that are basic chemical desinfectants. Their application to the main corpses of microorganism. The moments of the basic concepts in disinfection will also be described. How we, like vet, can get control under dangerous pathogen. And what is the main criteria of chemical desinfectants.