HS Code for Diammonium phosphate

Diammonium phosphate (DAP), chemically known as diammonium hydrogenorthophosphate, is classified under HS code 3105.30. This classification is part of Chapter 31, which is dedicated to mineral or chemical fertilizers. DAP is a highly concentrated phosphorus fertilizer that also provides a significant amount of nitrogen, typically with a nutrient composition of 18-46-0. The classification under 3105.30 is specific to this chemical compound when it is presented as a fertilizer or in a manner consistent with agricultural use. The Harmonized System distinguishes between pure chemicals and those intended for soil enrichment. For DAP to be classified here, it must be the primary constituent. If the DAP is mixed with other fertilizing elements like potassium, it would move to other subheadings within 3105, such as 3105.20. The code 3105.30 is essential for international trade as it allows for the monitoring of phosphorus-based fertilizer flows and the application of specific agricultural tariffs.

Products Included

• Granular diammonium phosphate for direct soil application
• Technical grade DAP used in the production of liquid fertilizers
• DAP used as a fire retardant in forest fire suppression chemicals
• DAP used as a yeast nutrient in industrial fermentation processes
• DAP used in the manufacture of matches and paper

Common Misclassification

DAP is often misclassified under 3102 (Nitrogenous fertilizers) or 2835 (Phosphates). 3102 is incorrect because DAP contains both nitrogen and phosphorus. 2835 is for pure chemical phosphates; however, the General Rules of Interpretation (GRI) dictate that if a product is a fertilizer, Chapter 31 takes precedence over Chapter 28. Another common error is confusing it with monoammonium phosphate (MAP), which is 3105.40.

FAQ

What is the HS code for diammonium phosphate?

The specific HS code for diammonium phosphate is 3105.30.

Is industrial grade DAP classified differently?

Generally, no. If the product is diammonium hydrogenorthophosphate, it remains under 3105.30, although very high purity samples for laboratory use might occasionally be scrutinized under 2835.