Ammonium bifluoride
General Product Information
| Article | Ammonium bifluoride |
| Synonyms | Ammonium acid fluoride, Ammonium hydrofluoride, Ammonium difluoride, Ammonium hydrogendifluoride, Ammonium hydrogen difluoride |
| CAS No. | 1341-49-7 |
| EEG No. | 215-676-4 |
| EINECS No. | 226-218-8 |
| IMO | Class 8(c). |
| Tariff Code | 28261910 |
| UN No. | 1727 |
| VLG/ADR | Class 8, Packing Group II |
Description
Ammonium bifluoride is an inorganic compound. It is a colorless to white, crystalline solid with a pungent odor. It is widely used in industrial applications because of its reactive and etching properties. The product is highly Hygroscopic and soluble in water, forming an acidic solution.
Characteristics
- Odor: Pungent, pungent.
- Hygroscopic: Yes.
- Color: White to Colorless.
- Grade: Technical.
- Solubility: Soluble in water.
- Shape: Crystals or powder.
Physical & Chemical Properties
| Chemical Structure | NH4HF2 |
| Molar Weight | 57.04 g/mol |
| Melting Point | Approx. 125 °C (decomposes). |
| Boiling Point | – |
| Density | – |
| Refractive Index | – |
| pH | < 3 (on 1% solution) |
Applications
Ammonium bifluoride is applied in various ways, for instance:
1. Chemical Industry
As an intermediate for the production of fluorine-containing compounds.
2. Glass Industry
For matting, etching and polishing glass surfaces.
3. Metalworking
Cleaning and passivation of stainless steel; removal of oxide layers.
4. Semiconductor Industry
As a cleaning agent for silicon and other components.
5. Textile & Leather Industry
As a mordant at specific operations.
6. Ceramics & Porcelain
For conditioning surfaces prior to further processing.
Interessing Links
- CAS Common Chemistry – Ammonium Bifluoride
- European Chemicals Agency (ECHA) – For chemical information and regulations.
- PubChem – Ammonium Bifluoride – Chemical information by the National Library of Medicine of the National Center for Biotechnology Information (NIH-NCBI).
- Wikipedia – Ammonium bifluoride