Ammonium fluoride is a crystalline, noncombustible inorganic compound represented by the chemical formula NH4F or FH4N <1, 2>. It is a fluoride salt through ammonium as the counterion and is corrosive to cement, glass, and also most steels, consisting of aluminum <1, 2>.
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Ammonium Fluoride Identification | |
| CAS Number | 12125-01-8 <1> |
| PubChem CID | 25516 <1> |
| ChemSpider ID | 23806 <3> |
| UN Number | 2505 <1> |
| UNII | 4QT928IM0A <1> |
| EC Number | 235-185-9 <1> |
| RTECS Number | BQ6300000 <1> |
| InChI Key | LDDQLRUQCUTJBB-UHFFFAOYSA-N <1> |
Ammonium Fluoride Formula
How is Ammonium Fluoride Prepared
It is synthesized by the enhancement of ammonia gregarding cold hydrofluoric acid at a temperature of around 10 °C stood for by the reactivity <4>:
NH3 + HF → NH4F
It deserve to be prepared by making use of silicon tetrafluoride gas (SiF4) and high purity ammonia (NH3) as reactants, which is offered in the adhering to equations <4>:
3SiF4 + 2H2O → 2H2SiF6 + SiO2
H2SiF6 + 2NH3 → (NH4)2SiF6
(NH4)2SiF6 + 4NH3 + 2H2O → SiO2 + 6NH4F
Reactions with Other Compounds
Ammonium Fluoride and Water
When NH4F reacts via water, it produces hydrofluoric acid and also ammonium hydroxide, as stood for by the complying with equation <2>:
NH4F + H2O → NH4OH + HF
Calcium Nitrate and Ammonium Fluoride
Ammonium fluoride reacts with calcium nitrate to develop calcium fluoride, dinitrogen oxide, and water:
Ca(NO3)2 + 2NH4F → CaF2 + 2N2O + 4H2O
Ammonium Fluoride and Iodine
When ammonium fluoride and also iodine are offered as reactants, they undergo a solitary displacement reaction to create ammonium iodide and fluorine:
NH4F + I2 → NH4I2 + F
Ammonium Fluoride Crystals
Properties and also Characteristics of Ammonium Fluoride
General Properties | |
| Molar Mass/Molecular Weight | 37.037 g/mol <1> |
Physical Properties | |
| Color and also Appearance | White or colorless crystalline powder <1> |
| Melting Point | 238 °C, 460.4 °F <1> |
| Boiling Point | N/A |
| Density | 1.01 g cm-3, 1.32 at 77 °F <1> |
| pH | Aqueous NH4F is acidic <1> |
| State of issue at room temperature | Dry powder or liquid <1> |
| Solubility | Insoluble in liquid NH3, slightly soluble in alcohol <1> |
| Solubility in Water | 83.5 g/100 g at 25 °C <1> |
| Magnetic Susceptibility (χ) | -23.0 X 10-6 cm3/mol |
Atomic Properties | |
| Crystal Structure | Hexagonal wurtzite |
Ammonium Fluoride Structure
Uses
For etching glass, sprucing up metal surencounters, extracting rare metals, and disinfection and also preservation in the unavoidable market <5>As masking agents, preservatives, and also reagents for analysis <5>Is It Safe
NH4F reasons acute toxicity once it is swallowed, inhaled, or comes in contact with skin <1>. Its inhalation may lead to irritation of the respiratory tract and ingestion of little quantities of soluble fluorides can likewise be fatal <1>. Its contact with skin causes burns, and also exposure through eye contact deserve to irritate the mucous membrane <1>.
References:
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