Hydrogen fluoride
CAS Number: 7664-39-3
Chemical Formula: HF
Synonyms:
Fluorhydric acid
Anhydrous hydrogen fluoride
Hydrofluoric acid anhydrous
Appearance: Colorless fuming liquid
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Hydrogen fluoride is a highly corrosive, colorless chemical compound with strong reactivity. It dissolves readily in water to form hydrofluoric acid and exhibits powerful etching properties toward silica and silicate materials. It serves as a critical raw material for fluorine chemistry, being widely used in fluorine refrigerant production, aluminum refining, electronic component cleaning, and fluorine salt manufacturing. Due to its high toxicity and corrosiveness, strict protective measures must be taken during production, storage, transportation, and application. It reacts violently with many metals, glass, ceramics, and siliceous materials, so it must be stored and transported using specialized corrosion‑resistant containers.
Parameters
| Item | Value |
| Melting point | -83.6 °C (lit.) |
| Boiling point | 19.5 °C (lit.) |
| Density | 0.991 g/mL at 20 °C (lit.) |
| Vapor pressure | 760 mmHg (25 °C) |
| Refractive index | 1.326 |
| Fp | 130 °C |
| Storage temp. | 2-8°C |
| Solubility | Miscible with water |
| Form | Liquid |
| pKa | 3.17 |
| Color | Colorless |
| Odor | Pungent irritating odor |
| Water solubility | Miscible |
| Stability | Hygroscopic, corrosive, incompatible with glass, silica, alkalis |
| LogP | 0.23 |
| CAS DataBase Reference | 7664-39-3(CAS DataBase Reference) |
| NIST Chemistry Reference | Hydrogen fluoride(7664-39-3) |
| EPA Substance Registry System | Hydrogen fluoride (7664-39-3) |
Safety Information
| Item | Value |
| Hazard Codes | T+; C |
| Risk Statements | 26/27/28-35 |
| Safety Statements | 7/9-26-36/37/39-45 |
| RIDADR | UN1052 |
| WGK Germany | 3 |
| RTECS | MW7875000 |
| Autoignition Temperature | Non-flammable |
| TSCA | TSCA listed |
| HazardClass | 8 |
| HS Code | 28111100 |
| Hazardous Substances Data | 7664-39-3(Hazardous Substances Data) |
| Toxicity | Highly toxic; corrosive to mucosa and tissues |
Product Application of Hydrogen fluoride CAS#7664-39-3
Hydrogen fluoride is mainly used in the production of fluorine‑containing refrigerants, fluoropolymers, and various inorganic and organic fluorides. It is widely applied in aluminum electrolysis, glass etching, semiconductor manufacturing, stainless steel pickling, and petroleum alkylation processes. It also acts as a catalyst and fluorinating agent in organic synthesis. Strict safety protocols are required in all applications to prevent exposure and leakage.
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