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

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳ChinaFree+25.0%25%
🇲🇽MexicoFreeFree
🇨🇦CanadaFreeFree
🇩🇪GermanyFreeFree
🇯🇵JapanFreeFree

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2826.19.20Higher: 38.7% vs 25%

If primarily sodium fluoride with trace aluminum

Classification follows principal metal; sodium-dominant shifts to other fluorides.

2842.90Lower: 13.3% vs 25%

If as complex fluoride salt of multiple metals

Fluoroaluminates explicitly listed under complex fluorine salts in 2826, but complex salts go to 2842.

3105.30.00Same rate: 25%

If used as fertilizer component

Inorganic fertilizers excluded from Chapter 28 per note 3 to Chapter 31.

Not sure which classification is right?

Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.

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