In experiments on white laboratory rats the influence of fluor-, cyan- and sulfur-containing gaseous products, formed under thermodestruction of synthetic materials in normal and high environmental temperature on external respiration and some parameters of acid-base blood values was investigated. It was shown, that external respiration, due to considerable it depression, could not compensate neither hypoxic state, accompanied by hypoxemia, nor hypercapnia and acidosis, developed under the influence of toxic agents both in normal environmental temperature and in hyperthermia.