[Hygienic standardization of the levels of selenium hexafluoride in the air of a working area].

The paper presents the results of investigations on the hygienic standardization of the levels of selenium hexafluoride (SeF6) in the air of a working area. It also analyzes the data on the effects of SeF6 inhalation on laboratory animals, by applying morphological, physiological, hematological, and biochemical studies. The studies have yielded the basic parameters of inhalation toxicity and established the threshold of the irritant action of the substance, developed and approved its maximally acceptable concentration (0.

[Experimental data on bases of MAC of piroxicam in the air of workplace].

The experiments on white rats, mice, guinea pigs, rabbits studied inhalation toxicity of piroxicam. The substance having strong cumulation (Jcum = 0.5) and embryotoxic effects (Limap = 0.

[Carcinogenic activity of hexachlorophene].

Albino noninbred rats were exposed to hexachlorophene (chronic inhalation of 0.1 CL50 for 12 months). The tumors detected occurred mostly in the lungs.