Ammonium fluoride is a crystalline, noncombustible not natural compound stood for by the chemical formula NH4F or FH4N <1, 2>. It is a fluoride salt v ammonium together the counterion and is corrosive come cement, glass, and also most metals, 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 addition of ammonia gas come cold hydrofluoric acid at a temperature of about 10 °C represented by the reaction <4>:
NH3 + HF → NH4F
It have the right to be prepared by making use of silicon tetrafluoride gas (SiF4) and also high purity ammonia (NH3) as reactants, i beg your pardon is provided in the complying with equations <4>:
3SiF4 + 2H2O → 2H2SiF6 + SiO2
H2SiF6 + 2NH3 → (NH4)2SiF6
(NH4)2SiF6 + 4NH3 + 2H2O → SiO2 + 6NH4F
Reactions with various other Compounds
Ammonium Fluoride and also Water
When NH4F reacts through water, the produces hydrofluoric acid and also ammonium hydroxide, as stood for by the adhering to equation <2>:
NH4F + H2O → NH4OH + HF
Calcium Nitrate and also Ammonium Fluoride
Ammonium fluoride reacts through calcium nitrate to form calcium fluoride, dinitrogen oxide, and water:
Ca(NO3)2 + 2NH4F → CaF2 + 2N2O + 4H2O
Ammonium Fluoride and Iodine
When ammonium fluoride and also iodine are supplied as reactants, they undergo a solitary displacement reaction to type ammonium iodide and fluorine:
NH4F + I2 → NH4I2 + F
Ammonium Fluoride Crystals
Properties and Characteristics the 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 in ~ 77 °F <1> |
| pH | Aqueous NH4F is acidic <1> |
| State of issue at room temperature | Dry flour or fluid <1> |
| Solubility | Insoluble in fluid NH3, slightly soluble in alcohol <1> |
| Solubility in Water | 83.5 g/100 g in ~ 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, polishing metal surfaces, extracting rare metals, and also disinfection and preservation in the impending industry <5>As masking agents, preservatives, and reagents for analysis <5>Is that Safe
NH4F reasons acute toxicity when it is swallowed, inhaled, or comes in call with skin <1>. That is inhalation may an outcome in irritation of the respiratory tract and also ingestion of tiny quantities of soluble fluorides can additionally be deadly <1>. Its call with skin reasons burns, and exposure v eye call can irritate the mucous membrane <1>.
References:
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