Sodium Aluminum Fluoride (Na3AlF6, Cryolite) from Germany
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 — Germany → United States
0%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 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