Veterinary drugs pirimiphos methyl

CAS:29232-93-7

MF:C11H20N3O3PS

MW:305.33

EINECS:249-528-5

Specification: 99% min pirimiphos methyl powder

Sample:pirimiphos methyl powder

Packaging:1kg/bag, 25kg/drum

Brand:Global ASAP Nutrition Factory

Appearance:yellow liquid

Shelf Life: 2 Years

Test Method: HPLC

pirimiphos methyl powder Usage and Synthesis.

Pirimiphos-methyl is a fast-acting, broad-spectrum organophosphorus insecticide and acaricide with stomach poison and fumigation effects. It has good efficacy against stored grain beetles, weevils, rice weevils, saw-toothed grain beetles, pseudo-saw-toothed grain beetles, grain borers, powdery leaf moths, moths and mites. It can also control warehouse pests, household and public health pests (mosquitoes and flies).

Uses of pirimiphos methyl powder.

It has a broad insecticide spectrum, rapid action, strong penetration, and has contact, stomach poison and fumigation effects. It is mainly used for storage pests and sanitary pests. If the room temperature is 30℃ and the relative humidity is 50%, the efficacy can reach 45 to 70 weeks.

In Southeast Asia, 200g of 2% powder is applied to each ton of grain, which can keep it free of insects for 6 months. Spray the sacks with the agent, and the grain in the bag will not be attacked by saw-toothed grain beetles, rice weevils, grain borers, and powdery moths for several months; if the sacks are treated by immersion, the effective period will be longer. It can be used as a substitute for highly toxic organophosphorus pesticides.

Methyl pirimiphos is a fast-acting, broad-spectrum insecticide and acaricide. It has good efficacy against stored grain beetles, weevils, moths and mites, and can also prevent warehouse pests, household and public health pests.

Use of pirimiphos methyl.

The purpose of methyl pirimiphos is to store pests and eliminate pests. It is an organic insecticide that not only has a wide range of applications and can be used in storage, household hygiene, crops, etc., but also has the advantages of strong efficacy and long duration. It can effectively prevent and control warehouse pests, household and public health pests, and can also eliminate grain beetles, weevils, moths and mites. Because methyl pirimiphos is used in different environments, the method of use and the duration of efficacy will be different.

Product method of Bulk pirimiphos methyl.

Preparation of diethylguanidine nitrate: Add diethylamine in a molar ratio, add about 200mL of mother liquor, then cool it with a cold water bath, add 65% concentrated nitric acid (nitric acid/diethylamine = 1.2 molar ratio) dropwise at 10-20℃, then add 0.5mol of lime nitrogen, gradually raise the temperature to 70℃, then keep the reaction for 0.5-2h, pass 0.5mol of CO2 gas, the ventilation time is about 0.5h, then heat to 90℃ and filter while hot, discard the filter cake, cool the filtrate to precipitate needle-shaped crystals, filter and dry, and the mother liquor is used for the next batch of experiments.

Preparation of 2-diethylamino-6-methyl-4-hydroxypyrimidine: Add 0.1 mol of diethylguanidine nitrate, then add 120 mL of toluene, start stirring, add potassium carbonate according to the ratio, raise the temperature to a slight reflux, and then slowly add ethyl acetoacetate. The addition time is 1.5 to 2 hours. After the addition is completed, reflux and evaporate the low-boiling substances. Reflux for 0.5 to 2 hours, cool down, add 120 mL of water, and adjust the solution to weak acidity (pH value of about 6) with hydrochloric acid under sufficient stirring conditions, then remove the solvent toluene (recover and reuse), and obtain a light yellow granular solid. Synthesis of Methyl Pirimiphos: Add 0.10 mol of hydroxypyrimidine, then add 70 mL of ethyl acetate solvent, stir, then add an acid-binding agent anhydrous K2CO3 according to the ratio, reflux for 1 hour, cool to 45-50 ° C, add a certain ratio of methyl chloride dropwise, raise the temperature to reflux temperature after the addition, reflux reaction for 6-10 hours, cool and filter, discard the filter cake, desolventize the mother liquor (recover and reuse), and you can get yellow methyl Pirimiphos crude oil.