FIELD: medicine, pharmaceutics.SUBSTANCE: inventions relate to field of medicine, veterinary, agriculture and pharmacology and deals with biocidal polyguanidine of formula Acid or (1), method of its obtaining and based on it biocidal composition.EFFECT: inventions make it possible to obtain biocidal polyguanidine with high antimicrobial activity with wide spectrum of action.4 cl, 14 tbl, 17 exMevcut buluş, poli-guanidinlerle, kullanımlarıyla ve bahsedilen poli-guanidinleri içeren bileşimlerle ilgilidir.