Organophosphorus pesticide poisoning

There are many types of organophosphorus pesticides, which are classified into high toxicity, poisoning and low toxicity according to their toxicity. Oral halal lethal doses (mg / kg) of organophosphorus pesticides commonly used in China are as follows: parathion (1605) is 3.5 to 15mg; systemic phosphorus (1059) is 4 to 10mg; parameta (3911) is 2.1 to 3.7 mg; acetam phosphate is 4 mg; thiotep is 5 mg; phosphamine is 7.5 mg (the above are highly toxic). Dichlorvos is 50 to 110 mg; methyl parathion (methyl 1065) is 14 to 42 mg; methyl systemic phosphorus (methyl 1059, 4044) is 80 to 130 mg (the above are poisonous). 450-500 mg of trichlorfon; 230-450 mg of dimethoate; 1800 mg of malathion (4049, marathon); 430 mg of dibromophosphine; 250 mg of fenitrothion (fenalthion) ). Highly toxic organophosphorus pesticides can be poisoned with a small amount of contact, and a large amount of low toxic pesticides can also cause harm to the body. The amount of organophosphorus poisoning and lethality varies widely. From the digestive tract into the respiratory tract with a more general concentration, the symptoms of inhalation or skin absorption poisoning are severe and the disease is acute; however, if a large amount or an excessively high concentration of organophosphorus pesticides is inhaled, the disease can be caused within 5 minutes and it can quickly die.