Sodium fluoride
IUPAC name	Sodium fluoride
Identifiers
CAS number	[7681-49-4]
Properties
Molecular formula	NaF
Molar mass	41. IUPAC Nomenclature is a system of naming Chemical compounds and of describing the science of Chemistry in general CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to A chemical formula is a way of expressing information about the Atoms that constitute a particular Chemical compound, and how the relationship between those atoms changes Molar mass, symbol M, is the Mass of one mole of a substance ( Chemical element or Chemical compound) 99 g/mol
Appearance	White solid
Density	2. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different 558 g/cm³, solid
Melting point	993 °C
Boiling point	1700 °C
Solubility in water	4. The melting point of a solid is the temperature range at which it changes state from solid to Liquid. The boiling point of a liquid is the temperature at which the Vapor pressure of the liquid equals the environmental pressure surrounding the liquid Solubility is the characteristic Physical property referring to the ability of a given substance the Solute, to dissolve in a Solvent. Water is a common Chemical substance that is essential for the survival of all known forms of Life. 13 g/100 g at 25 °C
Hazards
EU classification	Toxic (T)
NFPA 704	0 2 0
R-phrases	R25, R32, R36, R38
S-phrases	S22, S36, S45
Flash point	Non-flammable. 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 Symbolism The four divisions are typically color-coded with blue indicating level of Health Hazard, red indicating R-phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous R-phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous R-phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous R-phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous R-phrases (short for Risk Phrases) are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning 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. S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning 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. The flash point of a flammable liquid is the lowest Temperature at which it can form an ignitable mixture in air
Related compounds
Other anions	sodium chloride sodium bromide sodium iodide
Other cations	potassium fluoride calcium fluoride caesium fluoride
Related bases	None listed. An ion is an Atom or Molecule which has lost or gained one or more Valence electrons giving it a positive or negative electrical charge For sodium chloride in the diet see Salt. Sodium chloride, also known as common salt, table salt, or Halite, is a Sodium bromide, also known as sedoneural is a Salt with the formula Na[[bromine Br]] widely used as an Anticonvulsant and a Sedative Sodium iodide is a white Crystalline Salt with Chemical formula Na[[Iodine I]] used in radiation detection treatment of Iodine deficiency An ion is an Atom or Molecule which has lost or gained one or more Valence electrons giving it a positive or negative electrical charge Potassium fluoride is the Chemical compound with the formula KF Calcium fluoride (CaF2 is an insoluble Ionic compound of Calcium and Fluorine. Caesium fluoride ( cesium fluoride in North America is an ionic compound usually found as a hygroscopic white solid In Chemistry, a base is most commonly thought of as an aqueous substance that can accept Protons This refers to the Brønsted-Lowry theory of acids and
Related compounds	TASF reagent
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. The TASF reagent or tris(dimethylaminosulfonium difluorotrimethylsilicate is a Reagent in Organic chemistry with Structural formula +- In Chemistry, the standard state of a material is its state at 1 bar (100 Kilopascals exactly In Chemistry, an ionic compound is a Chemical compound in which Ions are held together in a lattice structure by Ionic bonds Usually the positively This colourless solid is the main source of the fluoride ion in diverse applications. Fluoride is the reduced form of Fluorine. Both organic and Inorganic compounds containing the element fluorine are considered fluorides NaF is less expensive and less hygroscopic than KF. Hygroscopy is the ability of a substance to attract Water Molecules from the surrounding environment through either absorption or Adsorption Potassium fluoride is the Chemical compound with the formula KF

Production

NaF is prepared by neutralizing waste hydrofluoric acid resulting from the production of superphosphate fertilizer. Hydrofluoric acid is a Solution of Hydrogen fluoride in Water. Superphosphate is a Fertilizer produced by the action of concentrated Sulfuric acid on powdered Phosphate rock. It is also generated by treating sodium hydroxide and sodium carbonate with hydrofluoric acid, followed by concentrating the resulting solutions, sometimes with the addition of alcohols to precipitate the NaF:

HF + NaOH → NaF + H₂O

Using an excess of HF gives the bifluoride NaHF₂. Sodium hydroxide ( Na[[hydroxide OH]]) also known as Lye, caustic soda and (incorrectly according to IUPAC nomenclature Sodium carbonate (also known as washing soda or soda ash), is a Sodium Salt of Carbonic acid. Heating the latter releases HF and gives NaF.

HF + NaF ⇌ NaHF₂

In a 1986 report, the annual, worldwide consumption of NaF was estimated to be several million tonnes. ^[1]

Structure, properties, Uses

NaF crystallizes in the sodium chloride motif where both Na⁺ and F⁻ occupy octahedral coordination sites. For sodium chloride in the diet see Salt. Sodium chloride, also known as common salt, table salt, or Halite, is a ^[2]

Sodium fluoride is sold in tablets for cavity prevention.

NaF is used as a cleaning agent, often to remove iron stains. A variety of specialty chemical applications exist in synthesis and extractive metallurgy. NaF is a reagent for the synthesis of fluorocarbons. Fluorocarbons are chemical compounds that contain Carbon - Fluorine bonds The relatively low reactivity and high polarity of the carbon-fluorine bond imparts Representative substrates include electrophilic chlorides including acyl chlorides, sulfur chlorides, and phosphorus chloride. In Organic chemistry, an acyl chloride (or acid chloride) is an Organic compound which is a reactive derivative of a Carboxylic acid. ^[3] Like other fluorides, NaF finds use in desilylation in organic synthesis. Organic synthesis is a special branch of Chemical synthesis and is concerned with the construction of Organic compounds via Organic reactions Organic

Fluoride salts were used widely to enhance the strength of teeth by the formation of fluoroapatite, a naturally occurring component of tooth enamel. Fluorapatite, often with the alternate spelling of fluoroapatite, is a Mineral with the formula Ca5(PO43F (calcium halophosphate 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). Water fluoridation is the addition of a chemical to increase the concentration of Fluoride Ions in Drinking water with the purpose of reducing the Hexafluorosilicic acid is the Chemical compound with the formula H2SiF6 Toothpaste often contains sodium fluoride to prevent cavities. Toothpaste is a Paste or Gel Dentifrice used to clean and maintain the aesthetics and health of Teeth. Dental caries is a disease that damages Tooth structures resulting in what is commonly called tooth decay or cavities which are holes in the teeth

Safety

See also: Water fluoridation and water fluoridation controversy

The lethal dose for a 70 kg human is estimated at 5 – 10 g. Water fluoridation is the addition of a chemical to increase the concentration of Fluoride Ions in Drinking water with the purpose of reducing the ^[1]

See also

• Fluorine
• Water fluoridation
• Fluoride poisoning
• Caries
• Osteoporosis
• Insecticide
• Cryolite
• Light metals

References

1. ^ ^{a b} Jean Aigueperse, Paul Mollard, Didier Devilliers, Marius Chemla, Robert Faron, Renée Romano, Jean Pierre Cuer, “Fluorine Compounds, Inorganic” in Ullmann’s Encyclopedia of Industrial Chemistry 2005 Wiley-VCH, Weinheim. Fluorine, fluorum meaning "to flow" is the Chemical element with the symbol F and Atomic number 9 Water fluoridation is the addition of a chemical to increase the concentration of Fluoride Ions in Drinking water with the purpose of reducing the In high concentrations soluble Fluoride Salts are somewhat Toxic. Caries is a progressive destruction of any kind of Bone structure including the Skull, Ribs and other bones or the teeth. Osteoporosis is a Disease of Bone that leads to an increased risk of fracture. An insecticide is a Pesticide used against Insects in all developmental forms Cryolite ( Na 3 Al[[fluorine F]]6 Sodium hexafluoroaluminate) is an uncommon Mineral identified with the once large deposit Light metals are Metals of low Atomic weight. The cut off between light metals and Heavy metals varies DOI 10. 1002/14356007. a11 307
2. ^ Wells, A. F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
3. ^ Halpern, D. F. “Sodium Fluoride” Encyclopedia of Reagents for Organic Synthesis, 2001, John Wiley & Sons. DOI: 10. 1002/047084289X. rs071.

External links

• Sodium Fluoride at chemistry. org (American Chemical Society)
• Chemical Profile for Sodium Fluoride (CAS Number: 7681-49-4) at Scorecard, the pollution information site