The article is devoted to the substantiation of ambush MAC in the ambient air. Resorptive action of the insecticide on the organism of experimental animals has been studied under the conditions of 3-month 24-hour chronic inhalational exposure. On the basis of the studies the maximum single and average 24-hour ambush MACs in the ambient air have been developed, which are 0.05 and 0.03 mg/m3 respectively.
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