<unk>  salts and hydrofluoric acid are the main<unk> s of industrial value. Compounds with C-F bonds fall into the realm of organofluorine chemistry. The main uses of<unk> , in terms of volume, are in the production of cryolite, Na3AlF6. It is used in aluminium smelting. Formerly, it was mined, but now it is derived from hydrogen<unk> .<unk>  is used on a large scale to separate slag in steel-making. Mined<unk>  (CaF2) is a commodity chemical used in steel-making. Hydrofluoric acid and its anhydrous form, hydrogen<unk> , is also used in the production of fluorocarbons. Hydrofluoric acid has a variety of specialized applications, including its ability to dissolve glass. Cavity prevention<unk>  is sold in tablets for cavity prevention.<unk> -containing compounds, such as sodium<unk>  or sodium monofluorophosphate are used in topical and systemic<unk>  therapy for preventing tooth decay. They are used for water<unk> tion and in many products associated with oral hygiene. Originally, sodium<unk>  was used to<unk> te water; hexafluorosilicic acid (H2SiF6) and its salt sodium hexafluorosilicate (Na2SiF6) are more commonly used additives, especially in the United States. The<unk> tion of water is known to prevent tooth decay and is considered by the U.S. Centers for Disease Control and Prevention to be "one of 10 great public health achievements of the 20th century". In some countries where large, centralized water systems are uncommon,<unk>  is delivered to the populace by<unk> ting table salt. For the method of action for cavity prevention, see<unk>  therapy.<unk> tion of water has its critics (see Water<unk> tion controversy).<unk> ted toothpaste is in common use. Meta-analysis show the efficacy of 500 ppm<unk>  in toothpastes. However, no beneficial effect can be detected when more than one<unk>  source is used for daily oral care. Biochemical reagent<unk>  salts are commonly used in biological assay processing to inhibit the activity of phosphatases, such as serine/threonine phosphatases.<unk>  mimics the nucleophilic hydroxide ion in these enzymes' active sites. Beryllium<unk>  and aluminium<unk>  are also used as phosphatase inhibitors, since these compounds are structural mimics of the phosphate group and can act as analogues of the transition state of the reaction.
Fluoride
Phosphine
Phosphate
Bromide
Chorus
Saline 
Hydrogen fluoride
Goitrogen