| IUPAC name | Sodium fluoride |
| CAS number | 7681-49-4 |
| Molecular formula | NaF |
| Molar mass | 41.99 g/mol |
| Appearance | White solid |
| Density | 2.558 g/cm³, solid |
| Melting point | 993 °C |
| Boiling point | 1700 °C |
| Solubility in water | 4.13 g/100 g at 25 °C |
| EU classification | Toxic (T) |
| NFPA 704 |
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Sodium fluoride is an ionic compound with the formula NaF. This colourless solid is the main source of the fluoride ion in diverse applications. NaF is less expensive and less hygroscopic than KF, but otherwise the potassium salt is more widely used.
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Chemical structure and properties
NaF crystallizes in the sodium chloride motif where both Na+ and F− occupy octahedral coordination sites.<1>
It is usually used as a reagent for the synthesis of fluorides. Representative substrates include electrophilic chlorides including acyl chlorides, sulfur chlorides, and phosphorus chloride.<2> Like other fluorides, NaF finds use in desilylation in organic synthesis.
Uses
Fluoride salts are used widely to enhance the strength of teeth by the formation of fluoroapatite, a naturally occurring component of tooth enamel. In the US, NaF was once used to fluoridate drinking water but its use has been displaced by hexafluorosilicic acid (H2SiF6) or its sodium salt (Na2SiF6). Toothpaste often contains sodium fluoride to prevent cavities.
Sodium fluoride was also used as an antibiotic, as rat poison, and in ceramics.
See also
CariesOsteoporosisInsecticideReferences
| Sodium fluoride - Sodium monofluorophosphate - Olaflur - Stannous fluoride |
| Hydrogen peroxide - Chlorhexidine - Amphotericin B - Polynoxylin - Domiphen - Oxyquinoline - Neomycin - Miconazole - Natamycin - Hexetidine - Tetracycline - Benzoxonium chloride - Tibezonium iodide - Mepartricin - Metronidazole - Clotrimazole - Sodium perborate - Chlortetracycline - Doxycycline - Minocycline - Eugenol |
| Triamcinolone - Dexamethasone - Hydrocortisone |
| Epinephrine/Adrenalone - Benzydamine - Acetylsalicylic acid - Amlexanox |
| Calcium phosphate - Calcium glubionate - Calcium gluconate - Calcium carbonate - Calcium lactate - Calcium lactate gluconate - Calcium chloride - Calcium glycerylphosphate - Calcium citrate lysine complex - Calcium glucoheptonate - Calcium pangamate |
| Potassium chloride - Potassium citrate - Potassium hydrogentartrate - Potassium hydrogencarbonate - Potassium gluconate |
| Sodium chloride - Sodium sulfate |
| Zinc sulfate - Zinc gluconate |
| Magnesium chloride - Magnesium sulfate - Magnesium gluconate - Magnesium citrate - Magnesium aspartate - Magnesium lactate - Magnesium levulinate - Magnesium pidolate - Magnesium orotate - Magnesium oxide |
| Sodium fluoride - Sodium monofluorophosphate |
| Sodium selenate - Sodium selenite |
Categories: Fluorides | Metal halides | Sodium compounds | Inorganic compounds
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