3105.51.00.00 - Containing nitrates and phosphates

This HTS category, 3105.51.00.00, specifically classifies mineral or chemical fertilizers that contain both nitrogen and phosphorus as their primary fertilizing elements, and where these nutrients are present in the form of nitrates and phosphates. These products are designed to provide essential nutrients for plant growth, addressing deficiencies in soil nitrogen and phosphorus levels through chemical compounds.

The distinguishing feature of this category from its sibling, 3105.59.00.00, lies in the chemical form of the phosphorus. While 3105.59.00.00 covers "other" fertilizers containing nitrogen and phosphorus, this specific code pinpoints those where the phosphorus is present as a phosphate. This distinction is crucial for tariff purposes, reflecting specific chemical compositions and potential production processes.

As this is a leaf node within the HTS structure, there are no further subcategories. Classification within 3105.51.00.00 is therefore definitive once the presence of nitrates and phosphates, along with nitrogen and phosphorus as the fertilizing elements, has been established. This category encompasses a range of granular, powdered, or liquid formulations intended for agricultural or horticultural application.