Symptoms also described in toxicological publications. (normal content in the air - 0,03%; 2% - first symptoms of poisoning, 5% - headache, 20% - death).
Dalili pia Ilivyoelezwa katika machapisho ya kitoksini. (Kawaida maudhui katika hewa - 0.03% 2% - kwanza Dalili za sumu, 5% - kuumwa na kichwa, 20% - mauti).