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Hydrogen Fluoride- ( HF )
Hydrogen Fluoride is a colorless, nonflammable, and liquefied gas with a penetrating odor.
| Specifications | |
| Purity , % | 99.98 |
| Water | ≤ 50 ppmw |
|
Fluorosilicic Acid |
≤ 50 ppmw |
| Sulfur Dioxide | ≤ 30 ppmw |
| Non-volatile Acid | ≤ 50 ppmw |
| Ship | |
| DOT Shipping Name | Hydrogen Fluoride , Anhydrous |
| DOT Classification | 8 |
| DOT Label | Nonflammable Gas |
| UN Number | UN 1790 |
| CAS No. | 7664-39-3 |
| CGA/DISS | 660/638 |
| Technical Information | |
| Cylinder State @ 21.1°C | Liquid |
| Flammable Limits In Air | Non-flammable |
| Auto Ignition Temperature (°C ) | - |
| Molecular Weight (g/mol) | 20.01 |
| Specific gravity (air =1) | 0.99 |
| Critical Temperature ( °C ) | 188 |
| Critical Pressure ( psig ) | 2939.3 |
| Applications | |
| · In semiconductor fabrication: native oxide etch from silicon wafers · In various chemical reactions. | |