3105.40.00.10 - Ammonium dihydrogenorthophosphate (Monoammonium phosphate)

This HTS category, 3105.40.00.10, specifically covers ammonium dihydrogenorthophosphate, commonly known as monoammonium phosphate (MAP). This compound is a vital nitrogen and phosphorus-based fertilizer, essential for plant growth and widely used in agriculture to supply these crucial macronutrients to the soil. Its chemical composition and singular focus on monoammonium phosphate are the defining characteristics for classification under this heading.

The primary distinction of this subcategory lies in its specificity. While its sibling category, 3105.40.00.50, covers "Other" fertilizing compounds within the broader heading of ammonium phosphates, this entry is exclusively for monoammonium phosphate itself. This means that mixtures of monoammonium phosphate with diammonium hydrogenorthophosphate (DAP), or other fertilizing substances, would fall under the "Other" sibling category, not this one. The classification hinges on the precise chemical identity of the fertilizer product.

As this is a leaf node in the HTS, there are no further subcategories. Therefore, the classification ends with the identification of pure monoammonium phosphate. This ensures that importers and exporters clearly delineate products based on their precise chemical composition, facilitating accurate duty assessment and trade statistics for this important agricultural input.