3105.40.00 - Ammonium dihydrogenorthophosphate (Monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (Diammonium phosphate)

This HTS category, 3105.40.00, encompasses specific chemical fertilizers characterized by their phosphorus content, namely ammonium dihydrogenorthophosphate, commonly known as Monoammonium Phosphate (MAP), and mixtures containing it alongside diammonium hydrogenorthophosphate (DAP). These are primarily single-nutrient or compound fertilizers designed to provide phosphorus to plants, often in combination with nitrogen.

Distinguishing this category from its siblings, 3105.40.00 is specifically for MAP and mixtures thereof. It differs from 3105.30.00.00, which covers Diammonium Phosphate (DAP) as a pure substance. Furthermore, this category excludes fertilizers containing all three primary nutrients (nitrogen, phosphorus, and potassium) as classified under 3105.20.00.00, and those focused on phosphorus and potassium combinations (3105.60.00.00).

The subcategories within 3105.40.00.00 allow for further specificity in classification. Subcategory 3105.40.00.10 is designated for pure Ammonium dihydrogenorthophosphate (Monoammonium Phosphate), while 3105.40.00.50 serves as a residual category for other qualifying mixtures containing MAP. This hierarchical structure facilitates precise identification for import and export purposes.