用作农药的有机汞主要有氯化乙基汞(即西力生)和醋酸苯汞(即赛力散),其毒性比金属汞蒸气和无机汞盐为大。有机汞很容易经消化道吸收而且具有较大的脂溶性,能通过血脑屏障(即微血管与脑细胞的间隔,一般脂溶性物质可以透过,从血液进入脑细胞),进入脑内。有机汞进人人体后排泄很慢,易在体内蓄积,故小量长期连续摄入,会引起慢性中毒。可出现神经衰弱症 Organic mercury used as a pesticide is mainly ethyl ethyl mercury chloride (ie celex) and phenylmercuric acetate (ie salerol), its toxicity than metallic mercury vapor and inorganic mercury salt is large. Organo-mercury is easily absorbed by the digestive tract and has greater lipophilicity and can enter the brain through the blood-brain barrier (the gap between capillaries and brain cells, where lipophilic substances are generally permeable and enter the brain cells from the bloodstream). Organic mercury into the human body after excretion is very slow, easy to accumulate in the body, so a small amount of long-term continuous intake, can cause chronic poisoning. Neurasthenia may occur