Sodium Aluminum Fluoride (Na3AlF6, Cryolite) from China
Synthetic cryolite, or sodium hexafluoroaluminate, is a key flux in the Hall-Héroult process for aluminum electrolysis. Classified under HTS 2826.12.00.00 as a fluoride of aluminum, despite its complex formula, due to primary aluminum content. It is chemically defined per subheading note requirements.
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)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide assay certificates showing aluminum fluoride content to distinguish from pure sodium fluoride (2826.19)
• Comply with TSCA registration for industrial chemicals and label as hazardous due to fluoride toxicity
• Check for synthetic vs natural origin; both classify here but natural may require origin verification