Ammonium Bifluoride
Ammonium Acid Fluoride
- CAS
- 1341-49-7
- EC
- 215-676-4
- Sectors
- Mining & Metals, Building & Construction, Oil, Gas & Energy
Ammonium Bifluoride (CAS 1341-49-7) is a crystalline acidic fluoride salt that appears as white scales or flakes and is used where controlled release of hydrogen fluoride is required, serving stainless-steel pickling, glass frosting, masonry cleaning and oilfield acidizing. Its strong reactivity toward oxides and silicates makes it indispensable in surface finishing industries.
Typical Properties
| Molecular formula | F2H.H4N |
|---|---|
| Molecular weight | 57.04 g/mol |
| Appearance | white scales or flakes |
| Form | Solid |
| Color | White |
| Odor | acidic odor |
| Melting point | 125.6 °C |
| Boiling point | 240 °C (decomp) |
| Density | 1.50 g/cm³ |
| Water solubility | 630 g/L (20 °C) |
| Flash point | 238°C |
| pH | 2 (5.7g/l, H2O, 20°C) |
| GHS signal word | Danger · Corrosive, Acute toxicity, Irritant / harmful, Health hazard |
| HS code | 28261900 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Ammonium Bifluoride
Applications
Commonly applied in stainless-steel pickling, glass frosting, and masonry cleaning formulations. In the oilfield sector, it serves as an acidizing additive that promotes dissolution of siliceous scales. It is also an intermediate in fluorine compound synthesis.
Safety & Risks
Highly corrosive and toxic; contact causes severe burns and systemic fluoride poisoning. Generates HF vapors in moisture. Handle only with HF-resistant equipment and PPE, including gloves, face shield, and apron; calcium gluconate gel must be available on-site.
Packaging
Supplied in acid-resistant HDPE drums or plastic-lined steel containers. Store in ventilated, cool areas isolated from bases and oxidizers. Keep containers tightly closed and dry.