Chinese common name: Methylpyrimidine phosphorus
English common name: Pirimiphos methyl
Chemical name: O-o-dimethyl-o - (2-diethylamino-6-methylpyrimidine-4-yl) - sulfur phosphite
Physicochemical properties: The technical drug is a brownish yellow liquid, the relative density (d30) is 1.157, the vapor pressure at 30 ℃ is 13Mpa, the solubility in water at 30 ℃ is 5mg / L, and it is easily soluble in most organic solvents. It can be hydrolyzed by strong acid and alkali, unstable to light, and non corrosive to brass, stainless steel, nylon, polyethylene and aluminum.
Application: It is a quick acting, broad-spectrum insecticide and acaricide of organophosphorus, with gastric toxicity and fumigation. It has good efficacy against stored grain beetles, weevils, rice elephants, saw grain robbers, quasi saw grain robbers, grain beetles, pink spot borers, moths and mites. It can also control warehouse pests, household and public health pests (mosquitoes and flies).
Toxicity: This product is low toxic. The acute oral LD50 of female rats is 2050mg / kg; It is highly toxic to birds and chickens and toxic to fish.
Precautions: 90% crude oil, 50% emulsifiable concentrate (w / V), 20% water emulsion (EW).