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>|
|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
|Molar Mass/Molecular Weight||37.037 g/mol <1>|
|Color and also Appearance||White or colorless crystalline powder <1>|
|Melting Point||238 °C, 460.4 °F <1>|
|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|
|Crystal Structure||Hexagonal wurtzite|
Ammonium Fluoride Structure
UsesFor 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>.
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