EN
The aim of our study was to evaluate the acute oral and intratracheal toxicity of Pollenit F (LB-3) and Totalit Super 80 powdered fire-extinguishing agents used by fire-brigades. Acute oral toxicity tests were carried out on male В ALB mice by Gadumm's Probit Analysis, whereas acute intratracheal toxicity was tested on male Wistar rats by Thompson's method. For oral toxicity, Pollenit F was classified into the category of slightly toxic agents, while Totalit Super 80 into the probably relatively nonharmful class. In the intratracheal toxicity test, Pollenit F showed 4 times higher toxicity than in the oral toxicity test - a finding which is essential for the assessment of firemen exposure. LD50 for Totalit Super 80 could not be determined, probably due to different physical characteristics of the agent.