Types of Organophosphorus Pesticides

There are many types of organophosphorus pesticides, which are divided into three categories according to their toxicity: high toxicity, poisoning, and low toxicity. The oral LD50 (mg/kg) of most of the commonly used organophosphorus pesticides in China are as follows: Phosphorus (1605) is 3.5-15mg; systemic phosphorus (1059) is 4-10mg; phorate (3911) is 2.1-3.7mg; The above are highly toxic). Dichlorvos is 50～110mg; methyl parathion (methyl 1065) is 14～42mg; methyl systemic phosphorus (methyl 1059, 4044) is 80～130mg (the above are poisoning), trichlorfon is 450～ 500mg; dimethoate is 230-450mg; malathion (4049, marathon) is 1800mg; dibromphos is 430mg; Highly toxic organophosphorus pesticides can be poisoned when exposed to a small amount, and low toxicity can also cause harm when a large amount enters the body. The amount of poisoning and lethal dose of organophosphorus to human body varies greatly. The symptoms of inhalation or skin absorption from the digestive tract are more severe and acute; however, if a large amount or high concentration of organophosphorus pesticides is inhaled, it can be inhaled at 5 Onset within minutes, rapid death.