Dimethylpyrazole Phosphate, 3,4-Dimethylpyrazole Phosphate, Pyrazole-based Nitrification Inhibitor, DMPP, 202842-98-6

Dimethylpyrazole Phosphate, 3,4-Dimethylpyrazole Phosphate, Pyrazole-based Nitrification Inhibitor, DMPP, 202842-98-6

DMPP (3,4-DIMETHYLPYRAZOLE PHOSPHATE)

1. PRODUCT DEFINITION AND CHEMICAL IDENTITY

Note: DMPP is a specialized nitrification inhibitor used as an additive in nitrogenous fertilizers. It significantly enhances nitrogen use efficiency by stabilizing ammonium in the soil for an extended period (6–10 weeks), thereby reducing nitrogen losses through nitrate leaching and denitrification.

2. PHYSICAL AND CHEMICAL PROPERTIES

3. FUNCTIONAL PROPERTIES AND MECHANISM OF ACTION

• Nitrification Inhibition: DMPP selectively suppresses the activity of Nitrosomonas bacteria in the soil, which are responsible for the first and rate-limiting step of nitrification (the oxidation of ammonium (NH₄⁺) to nitrite (NO₂⁻)). This keeps nitrogen in the stable, plant-available ammonium form for a longer period.

• Nitrogen Loss Prevention: By slowing the conversion to nitrate (NO₃⁻), DMPP significantly reduces nitrogen losses via nitrate leaching into groundwater and gaseous losses via denitrification (N₂O, N₂).

• Extended Nitrogen Availability: Provides a controlled and prolonged nitrogen supply to crops over 6–10 weeks, aligning nitrogen availability with the peak demand periods of the plant.

• Enhanced Yield and Quality: Improves nitrogen use efficiency, leading to better root development, more vigorous vegetative growth (darker green leaves), and ultimately higher crop yields and quality. Controlled trials have reported yield increases of 10–20%.

• Environmental Benefit: By reducing nitrate leaching and nitrous oxide (a potent greenhouse gas) emissions, DMPP contributes to more sustainable and environmentally friendly agricultural practices.

4. PRODUCTION PROCESS (Summary)

1. Raw Materials: 3,4-Dimethylpyrazole (the core building block) is reacted with a phosphorylating agent (e.g., phosphoric acid) in a suitable polar aprotic solvent (e.g., DMF, DMSO).

2. Reaction: The condensation and phosphatization are carried out under controlled temperature (typically 50–80 °C) and pH conditions in a glass-lined or stainless steel reactor.

3. Purification: The crude product is purified via crystallization, filtration, or solvent extraction to remove impurities.

4. Drying and Packaging: The final product is dried to a whitish powder or formulated as a liquid and packaged accordingly.

5. SECTORAL APPLICATION AND USAGE GUIDE

Critical Application Prerequisites:

• Soil Contact is Mandatory: DMPP must be incorporated into the soil or washed in by rain/irrigation shortly after application. Leaving it on the surface renders it ineffective.

• Optimal Conditions: Performs best under neutral pH and moderate temperature conditions (<30 °C).

6. DOSAGE GUIDELINES (for Granular NPK Formulations Containing DMPP)

Liquid Formulation Dosage: Typically 1–2 L/ha, depending on the product formulation. Follow the manufacturer's specific recommendations.

7. ALTERNATIVES AND COMPARISON (Nitrification Inhibitors)

8. BENEFITS AND POTENTIAL RISKS

9. SAFETY, STORAGE, AND REGULATORY INFORMATION

• GHS Classification: Not classified as a dangerous substance according to CLP. Always refer to the supplier's Safety Data Sheet (SDS) for the specific formulation.

• Storage: Store in a cool, dry, and well-ventilated area. Keep containers tightly closed. For liquid forms, protect from freezing.

• Personal Protection: Standard industrial hygiene practices (gloves, safety goggles) are recommended. Avoid breathing dust.

• Environmental Precautions: Prevent large quantities from directly entering waterways or groundwater. The product is designed to degrade in the soil environment.

• Transport: Not classified as dangerous goods for transport (UN class not applicable). An MSDS is required for commercial shipment.

• Packaging:

  • Solid: 25 kg PE bags, 500 kg big bags.

  • Liquid: 1 L bottles, 200 L drums, 1000 L IBCs.

10. QUICK REFERENCE TABLE