Product Description
Cryolite (CAS No. 15096-52-3), also known as sodium hexafluoroaluminate, is a white crystalline inorganic compound with the chemical formula Na₃AlF₆. It is an important industrial flux primarily used in aluminum production, where it helps lower the melting point of alumina and improve the efficiency of the electrolytic smelting process.
Cryolite is also used in a range of other industrial applications, including ceramics, glass manufacturing, welding and metallurgical processes, and certain specialized formulations.
Our industrial-grade cryolite is available in 25 kg bags and customized bulk packaging, offering consistent quality for different production requirements. Detailed specifications, packaging options, and bulk quotations are available upon request.
Product Parameters
| Melting point | 1012 |
| Boiling point | decomp |
| density | 2.9 g/mL at 25 °C(lit.) |
| refractive index | 1.338 |
| storage temp. | 2-8°C |
| form | Colorless, crystalline solid |
| Odor | Odorless |
| Merck | 13,2634 |
| CAS DataBase Reference | 15096-52-3(CAS DataBase Reference) |
| EPA Substance Registry System | Cryolite (15096-52-3) |
| Hazard Codes | T,N |
| Risk Statements | 20/22-48/23/25-51/53-20 |
| Safety Statements | 22-37-45-61 |
| RIDADR | UN 3077 9/PG 3 |
| OEB | B |
| OEL | TWA: 2.5 mg/m3 [*Note: The REL also applies to other inorganic, solid fluorides (as F).] |
| WGK Germany | 1 |
| RTECS | BD0075000 |
| TSCA | Yes |
| HazardClass | 9 |
| HS Code | 2826300000 |
| Hazardous Substances Data | 15096-52-3(Hazardous Substances Data) |
Application Scenarios
Cryolite is an important inorganic fluoride compound widely used in aluminum metallurgy and various industrial manufacturing processes. Its primary applications include aluminum smelting, abrasive manufacturing, glass and enamel production, and selected metal surface treatment processes.
1. Aluminum Smelting
Cryolite is primarily used as a flux and electrolyte component in the electrolytic production of aluminum. It helps dissolve alumina, lower the operating temperature of the electrolyte, and improve electrical conductivity, contributing to efficient aluminum production.
2. Abrasive Manufacturing
Cryolite is used as an active filler in resin-bonded abrasives, including grinding wheels and cutting discs for metalworking applications. It helps optimize abrasive performance during grinding and cutting operations.
3. Glass and Enamel Manufacturing
Cryolite serves as a fluxing agent and opacifier in the production of glass, enamel, ceramic glazes, and glazing frits. It helps modify melting characteristics and achieve the desired appearance and surface properties of finished products.
4. Aluminum Alloy Casting and Metallurgical Applications
Cryolite can be incorporated into selected foundry fluxes, covering fluxes, and other metallurgical formulations used in aluminum alloy processing. Its suitability depends on the specific alloy composition and process requirements.
5. Metal Surface Treatment and Welding Applications
In selected industrial formulations, cryolite may be used as a fluoride-containing component in metal surface treatment products and welding or brazing fluxes. Application suitability depends on the formulation and processing conditions.
