Sodium fluoride
General
Systematic name	Sodium fluoride
Molecular formula	NaF
Molar mass	41.98817 g/mol
Appearance	White solid
CAS number	[7681-49-4]
Properties
Density and phase	2.558 g/cm3, solid
Solubility in water	i.22 g/100mL at 18 °C
Other solvents	poorly sol: ethanol
Melting point	993°C
Boiling point	1700°C
Basicity (pKb)	N/A
Hazards
MSDS	External MSDS
EU classification	Toxic (T)
R-phrases	R25, R32, R36, R38
S-phrases	S22, S36, S45
NFPA 704	Image File history File links Size of this preview: 567 × 599 pixelsFull resolution (1041 × 1100 pixel, file size: 743 KB, MIME type: image/png) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Sodium fluoride ... IUPAC nomenclature is a system of naming chemical compounds and of describing the science of chemistry in general. ... This article does not cite its references or sources. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... In physics, density is mass m per unit volume V. For the common case of a homogeneous substance, it is expressed as: where, in SI units: ρ (rho) is the density of the substance, measured in kg·m-3 m is the mass of the substance, measured in kg V is... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... It has been suggested that this article or section be merged with Solution. ... This article describes water from a scientific and technical perspective. ... Ethanol, also known as ethyl alcohol, drinking alcohol or grain alcohol, is a flammable, colorless, slightly toxic chemical compound with a distinctive perfume-like odor, and is the alcohol found in alcoholic beverages. ... The melting point of a crystalline solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... The acid dissociation constant (Ka), also known as the acidity constant or the acid-ionization constant, is a specific equilibrium constant for the reaction of an acid with its conjugate base in aqueous solution [1]. // When an acid dissolves in water, it partly dissociates forming hydronium ions and its conjugate... An example MSDS in a US format provides guidance for handling a hazardous substance and information on its composition and properties. ... Council Directive 67/548/EEC of 27 June 1967 on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (as amended) is the main source of European Union law concerning chemical safety. ... R-phrases are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations. ... S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning dangerous substances and preparations. ... NFPA 704 is a standard maintained by the U.S. National Fire Protection Association. ... Image File history File links NFPA_704. ... 0 2 0
Flash point	Non-flammable.
Supplementary data page
Structure and properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Other anions	sodium chloride sodium bromide sodium iodide
Other cations	potassium fluoride calcium fluoride
Related bases	None listed.
Related compounds	None listed.
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

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. The flash point of a flammable liquid is the lowest temperature at which it can form an ignitable mixture with air. ... The refractive index (or index of refraction) of a medium is a measure for how much the speed of light (or other waves such as sound waves) is reduced inside the medium. ... The relative dielectric constant of a material under given conditions is a measure of the extent to which it concentrates electrostatic lines of flux. ... Ultraviolet-Visible Spectroscopy or Ultraviolet-Visible Spectrophotometry (UV/ VIS) involves the spectroscopy of photons (spectrophotometry). ... Infrared spectroscopy (IR Spectroscopy) is the subset of spectroscopy that deals with the IR region of the EM spectrum. ... It has been suggested that NMR Data Processing be merged into this article or section. ... Mass spectrometry (also known as mass spectroscopy (deprecated)[1] or in common speech mass-spec) is an analytical technique used to measure the mass-to-charge ratio of ions. ... “Multivalent” redirects here. ... This articles section called Other facts does not adequately cite its references or sources. ... Sodium bromide is the chemical compound with the formula NaBr. ... Sodium iodide (NaI) is used in polymerase chain reactions (PCR) Categories: Chemistry stubs ... “Multivalent” redirects here. ... The chemical compound potassium fluoride (KF) is a metal halide composed of potassium and fluoride. ... Calcium fluoride (CaF2) is an insoluble ionic compound of calcium and fluorine. ... Acids and bases: Acid-base reaction pH Self-ionization of water Buffer solutions Systematic naming Acid-base extraction Acidity function Proton affinity Acids: Strong acids Weak acids Superacids Lewis acids Mineral acids Organic acids Bases: Strong bases Weak bases Superbases Lewis bases Organic bases edit In chemistry, a base is... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... In chemistry, an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. ... Fluoride is the ionic form of fluorine. ... The chemical compound potassium fluoride (KF) is a metal halide composed of potassium and fluoride. ...

Chemical properties and structure

NaF crystallizes in the sodium chloride motif where both Na⁺ and F^- occupy octahedral coordination sites. This articles section called Other facts does not adequately cite its references or sources. ...

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.^[1] Like other fluorides, NaF finds use in desilylation in organic synthesis. In chemistry, the terms acyl or acyl group refer to a functional group obtained from an acid by removal of a hydroxyl group. ... Organic synthesis is the construction of organic molecules via chemical processes. ...

Applications

Sodium fluoride is sold in tablets for cavity prevention.

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. Image File history File links Size of this preview: 800 × 519 pixelsFull resolution (1068 × 693 pixel, file size: 103 KB, MIME type: image/jpeg) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Sodium fluoride User:Mysid/otherimages ... Image File history File links Size of this preview: 800 × 519 pixelsFull resolution (1068 × 693 pixel, file size: 103 KB, MIME type: image/jpeg) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Sodium fluoride User:Mysid/otherimages ... Fluoroapatite, often with the alternate spelling of fluorapatite, is a mineral with the formula Ca5(PO4)3F. Fluoroapatite is a hard crystalline solid. ... Water fluoridation is the practice of adding fluoride compounds to water with the intended purpose of reducing tooth decay in the general population. ... Dihydrogen hexafluorosilicate is commonly used for fluoridate in the United States. ... Modern toothpaste gel Toothpaste is a paste or gel dentifrice used to clean and improve the aesthetic appearance and health of teeth. ... Dental caries, also described as tooth decay, is an infectious disease which damages the structures of teeth. ...

Sodium fluoride was also used as an antibiotic, as rat poison, and in ceramics.

Safety considerations

Main article: fluoride poisoning

Sodium fluoride is mildly toxic, LD₅₀ = 0.18 g kg^–1 in rats. In high concentrations, as with almost all substances, fluoride compounds are toxic. ...

References

1. ^ Halpern, D. F. “Sodium Fluoride” Encyclopedia of Reagents for Organic Synthesis, 2001, John Wiley & Sons. DOI: 10.1002/047084289X.rs071.

See also

External links

• Links to external chemical sources