ÌÈÍÈÌÀËÜÍÀß ÑÌÅÐÒÅËÜÍÀß ÊÎÍÖÅÍÒÐÀÖÈß , íàèìåíüøàÿ êîíöåíòðàöèÿ ÿäà â îáúåêòàõ îêðóæàþùåé ñðåäû, âûçûâàþùàÿ íàðêîòè÷åñêîå ñîñòîÿíèå ó 50% ïîäîïûòíûõ æèâîòíûõ. Îáîçíà÷àåòñÿ ñèìâîëîì CN50.
