Search results
Results from the WOW.Com Content Network
Hydrogen fluoride (fluorane) is an inorganic compound with chemical formula H F. It is a very poisonous, colorless gas or liquid that dissolves in water to yield hydrofluoric acid .
Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water.Solutions of HF are colorless, acidic and highly corrosive.A common concentration is 49% (48-52%) but there are also stronger solutions (e.g. 70%) and pure HF has a boiling point near room temperature.
At physiological pHs, hydrogen fluoride is usually fully ionised to fluoride. In biochemistry, fluoride and hydrogen fluoride are equivalent. Fluorine, in the form of fluoride, is considered to be a micronutrient for human health, necessary to prevent dental cavities, and to promote healthy bone growth. [28]
That encouraged federal health officials in 2015 to make recommendations to lower the amount of fluoride in drinking water supplies from 1.2 milligrams per liter.
Fluoride in community drinking water systems is regulated at the state and local level, Henderson says. If you drink water that's not from a well, you're getting at least some level of fluoride in ...
The tables below provides information on the variation of solubility of different substances (mostly inorganic compounds) in water with temperature, at one atmosphere pressure.
Fluoride is a naturally occurring mineral which is present in trace amounts in soil, plants, water and food, and at optimal levels helps to prevent cavities by keeping teeth strong.
SiO 2 + 4 [NH 4][HF 2] → SiF 4 + 4 [NH 4]F + 2 H 2 O. Potassium bifluoride is a related more commonly used etchant. Ammonium bifluoride has been considered as an intermediate in the production of hydrofluoric acid from hexafluorosilicic acid. Thus, hexafluorosilicic acid is hydrolyzed to give ammonium fluoride, which thermally decomposes to ...