High-Purity Potassium Sulfate for Greenhouse Use from China
Ultra-pure potassium sulfate crystals for controlled greenhouse environments, minimizing impurities for sensitive ornamentals. Classified HTS 3104.30.00.00 as potassic fertilizer potassium sulfate for agricultural use, not industrial chemicals. Dissolves rapidly for precise nutrient delivery.
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
• Include greenhouse application affidavits to prove agricultural end-use
• Purity >99% requires lab certificates to prevent Chapter 28 chemical classification
• Smaller bulk shipments common; ensure proper palletizing for customs inspection