Trisodium hexafluoroaluminate

Trisodium hexafluoroaluminate (CAS 13775-53-6), commercially known as cryolite, is a fluoride-based inorganic salt sourced from natural mineral deposits and synthesized as a synthetic equivalent.

Where is Trisodium hexafluoroaluminate used?

• Aluminum smelting: primary flux and electrolyte medium enabling dissolution and electrochemical reduction of alumina into metallic aluminum
• Aluminum production: molten bath in Hall-Héroult electrolytic cells, determining process efficiency and metal purity
• Agriculture: contact insecticide under the trade name Cryocide, targeting chewing insects such as grape phylloxera and citrus pests
• Glass and enamel: fluxing agent and opacifier that lowers melting temperatures and improves surface finish
• It also serves as a catalyst component in certain systems.

Good to know: Synthetic cryolite is the dominant commercial form. The agricultural specification is subject to regional registration.

Commercial specifications

• Synthetic cryolite dominant commercial form
• Bulk supply standard for metallurgical buyers; smaller packaged quantities for agricultural and industrial use