HS Code for Synthetic cryolite

Synthetic cryolite, chemically known as sodium hexafluoroaluminate, is classified under HS code 282630. This classification is situated within Chapter 28, which covers inorganic chemicals, precious metals, and rare-earth metals. Heading 2826 is designated for fluorides, fluorosilicates, fluoroaluminates, and other complex fluorine salts. The specific subheading 282630 is reserved for the synthetic version of cryolite, a compound essential in the industrial production of aluminum. The classification is driven by the chemical purity and the manufacturing origin of the substance. Unlike natural cryolite, which is a mineral found in the earth's crust, synthetic cryolite is produced through chemical reactions involving hydrofluoric acid, sodium hydroxide, and aluminum hydroxide. The Harmonized System distinguishes between naturally occurring minerals (Chapter 25) and chemically defined compounds produced in a laboratory or industrial setting (Chapter 28). Synthetic cryolite is primarily used as a flux in the electrolytic production of aluminum, as it lowers the melting point of alumina. It is also used in the manufacture of glass, ceramics, and as an active filler in resin-bonded abrasives for metal treatment. To qualify for this code, the product must meet the chemical definition of Na3AlF6 and must not contain additives that change its character from a basic chemical to a prepared mixture. Importers must provide chemical analysis reports to confirm the fluorine and aluminum content to ensure the product is not a simple mixture of salts.

Products Included

• Sodium hexafluoroaluminate (synthetic)
• Artificial cryolite powder
• Fluxing agents for aluminum smelting (pure synthetic cryolite)
• Industrial grade synthetic cryolite for glass manufacturing

Common Misclassification

Synthetic cryolite is often confused with natural cryolite, which is classified under 2530.90. It may also be misclassified under 2826.19 (other fluorides) if the specific hexafluoroaluminate structure is not identified. Prepared fluxes that contain other substances in addition to cryolite may fall under 3810.90.

FAQ

What is the HS code for synthetic cryolite?

The HS code for synthetic cryolite (sodium hexafluoroaluminate) is 282630.

Can natural cryolite be classified under this code?

No, natural cryolite is a mineral and is classified under HS code 2530.90.