Magnesium Chloride Hexahydrate from China
Magnesium chloride hexahydrate (MgCl2·6H2O) is a chemically defined inorganic salt of magnesium, commonly used as a de-icing agent and dust suppressant. It falls under HTS 2827.31.00.00 as a chloride of magnesium, fitting Chapter 28's provisions for metal salts. This crystalline form is the most prevalent commercial variant.
Duty Rate — China → United States
26.5%
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
• Verify purity and hydration state via lab analysis to confirm classification under chemically defined magnesium chlorides
• Include Safety Data Sheets (SDS) and chemical composition certificates for CBP review to avoid misclassification
• Watch for moisture content changes during shipping that could alter the hexahydrate form and documentation