Sodium Aluminum Fluoride (Na3AlF6, Cryolite)
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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If primarily sodium fluoride with trace aluminum
Classification follows principal metal; sodium-dominant shifts to other fluorides.
If as complex fluoride salt of multiple metals
Fluoroaluminates explicitly listed under complex fluorine salts in 2826, but complex salts go to 2842.
If used as fertilizer component
Inorganic fertilizers excluded from Chapter 28 per note 3 to Chapter 31.
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Import Tips & Compliance
• 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
Related Products under HTS 2826.12.00.00
Aluminum Fluoride (AlF3)
Aluminum fluoride is a white crystalline powder used primarily as a flux in aluminum smelting to lower the melting point of alumina. It falls under HTS 2826.12.00.00 as a fluoride of aluminum, a simple inorganic compound of a metal base. This chemically defined compound meets Chapter 28 criteria for classification here.
Synthetic Cryolite Powder (Na3[AlF6])
Fine powder synthetic cryolite used in aluminum production and opacifiers for glass/enamel. HTS 2826.12.00.00 covers this aluminum fluoride complex as chemically defined per subheading note. Particle size optimized for flux efficiency.
Aluminum Fluosilicate (Al2(SiF6)3)
Aluminum fluosilicate serves as a laundry sour and in water fluoridation. Classified in HTS 2826.12.00.00 as a complex fluoride of aluminum, chemically defined inorganic compound. Also used in synthetic zeolites.
Potassium Aluminum Fluoride (KAlF4)
Potassium aluminum fluoride is used as a cover flux in aluminum remelting to prevent oxidation. It qualifies for HTS 2826.12.00.00 as an aluminum fluoride complex, chemically defined inorganic salt. Primarily applied in secondary aluminum production.
Aluminum Fluoride Hydrate (AlF3·3H2O)
Hydrated aluminum fluoride is an intermediate in fluorochemical production and aluminum flux. Falls under HTS 2826.12.00.00 as the hydrate form remains a chemically defined fluoride of aluminum per Chapter 28. Used in ceramics and glass manufacturing.