HS Code for Monopotassium phosphate

Monopotassium phosphate (MKP), with the chemical formula KH2PO4, is classified under HS code 2835.24. This product falls under Chapter 28, which covers inorganic chemicals and precious metal compounds. Heading 2835 is dedicated to phosphinates (hypophosphites), phosphonates (phosphites), and phosphates. Subheading 2835.24 specifically identifies phosphates of potassium. MKP is a soluble salt often used as a fertilizer, a food additive, and a buffering agent. For classification in Chapter 28, the product must be a separate chemically defined compound, as per Note 1 to Chapter 28. This means that technical grade or food grade MKP is typically classified here, provided it has not been mixed with other nutrients or prepared in specific forms for retail sale as a fertilizer.

Products Included

• Anhydrous monopotassium phosphate
• Monopotassium phosphate monohydrate
• Food-grade potassium phosphate (monobasic)
• Technical-grade MKP for industrial buffering
• Crystalline monopotassium phosphate

Common Misclassification

The most frequent misclassification of monopotassium phosphate occurs with Chapter 31 (Fertilizers). If MKP is put up in tablets or similar forms, or in packages with a gross weight not exceeding 10 kg, it must be classified under 3105.60 as a mineral or chemical fertilizer containing phosphates and potash. Furthermore, it is often confused with dipotassium phosphate (also 2835.24) or tripotassium phosphate (2835.24). While all potassium phosphates share the same 6-digit code in many tariffs, some national sub-levels distinguish between them. It should also not be confused with sodium phosphates (2835.22).

FAQ

What is the HS code for monopotassium phosphate?

The HS code for monopotassium phosphate is 2835.24.

When is monopotassium phosphate classified in Chapter 31?

It is classified in Chapter 31 (specifically 3105.60) if it is packaged for retail sale as a fertilizer in weights of 10kg or less, or if it is mixed with other fertilizing elements like nitrogen.