Dimethyldichlorosilane (M2) CAS Number: 75-78-5

1. Agriculture – Nitrification Inhibitor

DMPP is primarily used as a nitrification inhibitor, similar in function to NBPT but acting slightly differently in soil chemistry:

Purpose:

Slows down the conversion of ammonium (NH₄⁺) into nitrate (NO₃⁻) by inhibiting Nitrosomonas bacteria.

Maintains nitrogen in the ammonium form longer, making it available for crops over a longer period.

Crop Benefits:

Improves Nitrogen Use Efficiency (NUE) for crops like corn, wheat, rice, vegetables, and fruit trees.

Reduces nitrogen losses through leaching and denitrification.

Can contribute to higher yields with the same nitrogen input.

Environmental Advantages:

Decreases nitrate contamination of groundwater.

Reduces nitrous oxide (N₂O) emissions, a potent greenhouse gas.

2. Fertilizer Formulation

DMPP is commonly blended with ammonium-based fertilizers:

Urea + DMPP or Ammonium Sulfate + DMPP:

Forms a controlled-release fertilizer effect.

Delays nitrification in soil, improving nitrogen availability during critical crop growth periods.

Application Methods:

Banding in soil, broadcast with fertilizer, or fertigation (liquid application).

Compatible with precision agriculture techniques.

3. Industrial and Environmental Impact

DMPP supports sustainable agriculture practices by reducing nitrogen losses.

Helps farmers comply with environmental regulations for nitrate leaching.

Often recommended for high-rainfall regions or soils prone to nitrate leahing.