fluoride


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fluoride,

a salt of hydrofluoric acid; see hydrogen fluoridehydrogen fluoride,
chemical compound, HF, a colorless, fuming liquid or colorless gas that boils at 19.54°C;. It is miscible with water and is soluble in benzene, toluene, and concentrated sulfuric acid.
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. See also fluoridationfluoridation
, process of adding a fluoride to the water supply of a community to preserve the teeth of the inhabitants. Tooth enamel ordinarily contains small amounts of fluorides and when the amount is augmented through the intake of fluoridated water, especially during the
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; fluorinefluorine
, gaseous chemical element; symbol F; at. no. 9; at. wt. 18.9984; m.p. −219.6°C;; b.p. −188.14°C;; density 1.696 grams per liter at STP; valence −1. Fluorine is a yellowish, poisonous, highly corrosive gas.
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.

Fluoride

 

a compound of fluorine with other elements. The fluorides of elements in Groups I and II of Mendeleev’s periodic system are solids with an ionic element—fluorine bond; the fluorides of most elements in Groups VI–VII are gases with a covalent element—fluorine bond. Compounds containing a C—F bond form numerous classes of fluorocarbons; the higher fluorides of many metals, such as U, V, Mo, W, and Re, are volatile substances. Fluorides occur in nature as constituents of minerals. In terms of chemical properties, the fluorides of halogens, inert gases, oxygen, nitrogen, and many other elements in higher oxidation states (for example, PtF5, CoF3, and AgF2) are oxidizing agents; the fluorides of arsenic, antimony, and boron are strong Lewis acids (seeACIDS AND BASES).

Fluorides can be obtained by the interaction of fluorine with elements, by the action of hydrogen fluoride on metals, and by other methods.

Hydrogen fluoride, oxyfluorides, and nitrogen fluorine compounds are widely used. The chlorine fluorides C1F3 and C1F5 are rocket-fuel oxidizing agents; C1F3 also serves as a fluorinating agent in the preparation of uranium hexafluoride, UF6, which is used in the atomic industry for the isotope separation of uranium. The volatile fluorides of metals are used in the application of metallic coatings. The fluorides of lithium, magnesium, calcium, strontium, barium, and other metals are used as raw materials in the manufacture of optical glass. (See alsoCRYOLITE.)

REFERENCES

See references under .

A. V. PANKRATOV

fluoride

[′flu̇r‚īd]
(inorganic chemistry)
A salt of hydrofluoric acid, HF, in which the fluorine atom is in the -1 oxidation state.

fluoride

1. any salt of hydrofluoric acid, containing the fluoride ion, F--
2. any compound containing fluorine, such as methyl fluoride
References in periodicals archive ?
Several types of toothpaste are sold in Pakistani market including local as well as imported brands having a varying amount of fluoride in the form of sodium monofluorophosphate (MFP) and sodium fluoride.
Apart from sodium fluoride and MFP, amine fluoride and stannous fluoride have also been used in toothpastes as therapeutic agents for caries control but these have received a little acceptance.
Drinking water from various sources of (well, bore well pressure pump source) bore well hand pump sources was collected in polyethylene bottle and fluoride content of drinking water was estimated using ion-selective electrode, by TWAD Board, Water Testing Centre.
21 the literature collectively suggests that high fluoride exposure negatively impacts a variety of outcomes related to cognitive functioning.
How does fluoride act in dental caries preven- tion?
Since fluoride is absorbable, the majority of the fluoride is absorbed rapidly and passively from the stomach and intestinal mucosa into the bloodstream.
Clinicians need to know the indications and contraindications, follow manufacturer directions for use, and obtain informed consent before using silver diamine fluoride
The 2006 NRC chapter summary on fluoride's endocrine effects says: '"In humans effects on thyroid function were associated with fluoride exposures of 0.
Both the B recommendation given by the USPSTF to fluoride varnish application and inclusion in the Bright Futures periodicity schedule mean that it is required by the Affordable Care Act to be covered by insurers without out of pocket costs to the patient.
I'm in New York state, and we've been reimbursed $30 per fluoride varnish application [since 2009], and this includes risk assessment and counseling, " said Dr.
Conclusion: Fluoride induced hepatotoxicity is effectively prevented by co-administration of Vitamin E treatment.
However, not everyone is happy about the use of fluoride in the water supply.