Mono Potassium Phosphate (MKP) Fertilizer from China
Water-soluble mono potassium phosphate (KH2PO4) provides potassium and phosphorus for fertigation systems. It qualifies under HTS 3104.90.0100 as an 'other' potassic fertilizer since phosphorus content doesn't trigger superphosphate classification in 3103.
Duty Rate — China → United States
25%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Document NPK ratio (0-52-34 for MKP) and solubility specs for proper potassic classification
• Ensure aqueous solutions qualify under Chapter 31 note 2(d) if liquid form
• Watch for misclassification as pure chemical under Chapter 28 if fertilizer intent unclear