202842-98-6

Basic information

• Product Name: 3,4-Dimethylpyrazole phosphate
• Synonyms: 3,4-DIMETHYL-1H-PYRAZOLIUM DIHYDROGEN PHOSPHATE;3,4-Dimethyl-1H-pyrazole Phosphate;Ente;1H-Pyrazole, 3,4-dimethyl-, phosphate (1:1);3,4-Dimethyl-1H-pyrazoliumdihydrogenphosphat;Entec;3,4-Dimethyl-1H-pyrazolium dihydrogen phosphate ,97%;3,4-Dimethylpyrazole phosphate, >=98%
• CAS NO: 202842-98-6
• Molecular Formula: C₅H₈N₂*H₃O₄P
• Molecular Weight: 194.125601
• EINECS: 2017-001-1
• Product Categories: All Inhibitors;Bases & Related Reagents;Heterocycles;Inhibitors;Nucleotides
• Mol File: 202842-98-6.mol
• Article Data: 4

Chemical Properties

• Melting Point: 167-169°C
• Appearance: /
• Storage Temp.: Hygroscopic, Refrigerator, Under Inert Atmosphere
• Solubility: Methanol (Slightly), Water
• Stability: Hygroscopic
• CAS DataBase Reference: 3,4-Dimethylpyrazole phosphate(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-Dimethylpyrazole phosphate(202842-98-6)
• EPA Substance Registry System: 3,4-Dimethylpyrazole phosphate(202842-98-6)

Safety Data

• Hazardous Substances Data: 202842-98-6(Hazardous Substances Data)

Usage

Description

3,4-Dimethylpyrazole (phosphate) (3,4-DMPP) is an inhibitor of nitrification deemed safe by extensive standard toxicology and ecotoxicology tests. When utilized on crops, 3,4-DMPP prevents nitrogen loss from soil, increases nitrogen use efficiency, and boosts crop yields. However, a meta-analysis found no influence of 3,4-DMPP on net crop yield, although it may boost yields in alkaline soil. 3,4-DMPP may be less effective in acidic soils and in the post-harvest period. DMPP interferes with ammonia monooxygenase from ammonia-oxidizing bacteria (AOB) and archaea (AOA) but may not directly affect AOB, AOA, and non-target populations.

Chemical Properties

Pale Beige Solid

Uses

Different sources of media describe the Uses of 202842-98-6 differently. You can refer to the following data:
1. A new nitrification inhibitor to be used on solid and in liquid fertilizers and slurry.
2. As a new nitrification inhibitor, 3,4-Dimethylpyrazole phosphate can be used on solid and in liquid fertilizers and slurry

Upstream product

• 1679-40-9 3-chloro-2-methyl-2-butenal 
• 1187-89-9 1-dimethylamino-2-methyl-1-buten-3-one 
• 2820-37-3 3,4-dimethyl-1H-pyrazole 

Relevant articles and documents

Preparation method of 3, 4-dimethylpyrazole and phosphate thereof

The invention discloses a preparation method of 3, 4-dimethylpyrazole and phosphate thereof, which comprises the following steps: S1. making 2-butanone react with formate at -10 to 50 DEG C in a reaction solvent under the condition of keeping alkaline by using an alkaline substance, carrying out extraction separation, adding an alkylation reagent, continuing the reaction to obtain a reaction solution, and carrying out post-treatment to obtain a solution of an alkene ether compound, and S2, making the alkene ether compound prepared in the step S1 react with hydrazine hydrate or hydrazine salt at the temperature of -10 to 60 DEG C after the pH value is adjusted to 2-9, adding the alkaline substance to adjust the pH value to 7-11 after the reaction is finished, and carrying out post-treatmentto obtain the 3, 4-dimethyl pyrazole. The preparation method disclosed by the invention has the remarkable advantages of cheap raw materials, simplicity and convenience in operation, high yield, simplicity in three-waste treatment, high product quality, capability of recycling the solvent and the like, and is suitable for industrial production.

Method for preparing 3, 4-dimethylpyrazole and phosphate thereof

The invention discloses a method for preparing 3, 4-dimethylpyrazole and phosphate thereof. The method for preparing the 3, 4-dimethylpyrazole includes the steps: (1) feeding 2-butanone, aldehyde andalkali solution into a microchannel reactor and performing aldehyde ketone condensation reaction to produce 4-hydroxy-3-methyl-2-butanone salt; (2) mixing reaction liquid obtained in the step (1) andacid liquid in the microchannel reactor to obtain 4-hydroxy-3-methyl-2-butanone water solution; (3) performing reaction on hydrazine hydrate and the 4-hydroxy-3-methyl-2-butanone water solution in themicrochannel reactor, mixing reaction liquid with the alkali solution and hydrogen peroxide, and performing oxidative dehydrogenation reaction to obtain 3, 4-dimethylpyrazole water solution; (4) performing organic extraction and distillation on the 3, 4-dimethylpyrazole water solution to obtain the 3, 4-dimethylpyrazole. According to the method, reaction time is greatly shortened, the yield and the purity of products are ensured, and continuous production can be realized.