Calcium Fluoride

Base Information

• Chemical Name: Calcium Fluoride
• CAS No.: 7789-75-5
• Deprecated CAS: 1357089-75-8,1414597-93-5,29070-15-3
• Molecular Formula: CaF2
• Molecular Weight: 78.07
• Hs Code.: 28261900
• European Community (EC) Number: 232-188-7
• ICSC Number: 1323
• UNII: O3B55K4YKI
• DSSTox Substance ID: DTXSID4050487
• Nikkaji Number: J43.727A
• Wikipedia: Calcium fluoride
• Wikidata: Q413374
• Mol file: 7789-75-5.mol

Synonyms:Calcium Fluoride;Fluoride, Calcium

Chemical Property of Calcium Fluoride

Chemical Property:

• Appearance/Colour: odorless gray powder or granules
• Melting Point: 1418 °C
• Refractive Index: 1.434
• Boiling Point: 2533 °C
• Flash Point: 2500°C
• PSA: 0.00000
• Density: 3.18 g/cm³
• LogP: -5.99200
• Storage Temp.: -20°C
• Sensitive.: Hygroscopic
• Solubility.: Slightly soluble in acid; insoluble in acetone.
• Water Solubility.: INSOLUBLE
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 2
• Rotatable Bond Count: 0
• Exact Mass: 77.9593972
• Heavy Atom Count: 3
• Complexity: 0

Purity/Quality:

98% ^*data from raw suppliers

Calcium fluoride ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xi,Xn
• Hazard Codes: Xi,Xn
• Statements: 36/37/38
• Safety Statements: 26-37/39-36

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Other Classes -> Fluorides, Inorganic
• Canonical SMILES: [F-].[F-].[Ca+2]
• Recent EU Clinical Trials: Prospective randomised multicenter phase-III-study:
• Inhalation Risk: Evaporation at 20 °C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying.
• Uses: ▼▲ Industry Application Role/benefit Chemical manufacture Production of hydrofluoric acid and fluoride Raw material/source of fluoride Production of fluorine fine chemicals and synthetic cryolite Raw material/source of fluoride Architectural material Production of glass Fluxing agent/promote the melting of raw materials Production of cement Mineralization agent Production of ceramic glaze Fluxes and coloring aids Metallurgy Iron and steel smelting, ferroalloy production,etc. Fluxing agent/reduce the melting point of refractory substances Medicine Treatment, control, prevention, & improvement of allergic reactions Promoting new bone formation Thermal imaging systems, spectroscopy, telescopes and excimer lasers Manufacture of optical components, such as windows and lenses Raw material/broad range of transmission light frequencies; low refractive index; high thermo stability Others Production of welding agents Important components in coatings of welding rods and welding powders Dehydration and dehydrogenation reaction Catalyst/accelerate the process of reaction Manufacture of brake lining Additive/helps reduce abrasion caused by high heat and friction Naturally occurring CaF2 is the principal source of hydrogenfluoride, a commodity chemicalusedto produce a wide range of materials. Fluoride is liberated from the mineral by the action of concentrated sulfuric acid: CaF2 (solid)＋H2SO4 (liq)→CaSO4 (solid)＋2HF (gas) CaF2 is used as an optical component because of its chemical stability under adverse conditions.Calcium fluoride is commonly used as a window material for both infrared and ultraviolet wavelengths, since it is transparent in these regions (about 0.15 to 9 mm) and exhibits an extremely low-refractive index. Calcium Fluoride is a water insoluble calcium source for use in oxygen-sensitive applications, such as metal production. In extremely low concentrations (ppm), fluoride compounds are used in health applications. Fluoride compounds also have significant uses in synthetic organic chemistry. They are also commonly used to alloy metal and for optical deposition. It is also used as a flux for melting and liquid processing of iron, steel and their composites. Its action is based on its similar melting point to iron, on its ability to dissolve oxides and on its ability to wet oxides and metals. Fluorspar is the main primary source of fluorine and its Compounds. In ferrous metallurgy it is used as a flux to increase the fluidity of the slag. The steel industry is the largest consumer; the chemical industry, second and glass and ceramics, third. Synthetic fluorspar is used in the optical industry (transmits u.v. rays), and pure calcium fluoride is used as catalyst in dehydration and dehydrogenations. Used to fluoridate drinking water. Calcium fluoride is the commercially important source for fluoride compounds as well as hydrogen fluoride. It is transparent from ultraviolet to infrared region. It is used in spectroscopy, thermal imaging systems and excimer lasers; it is also used in the manufacturing of optical components including windows, prisms and lenses. In addition, it is also used in aluminum-metallurgy, brake lining manufacturing industries, and in tooth enamel.
• Production method: The fluorite deposits which have been found in china, are main used the mine using underground mining method, or shallow open-pit mining, and underground deep mining, for ore body most tilt vein, the extending is also large. Mining method is based in shallow hole Shrinkage Method based. Mining process sees "phosphate rock." Beneficiation methods have two types generally, the one is raw ore can become qualified ore concentrate by handling select, the second is hand-selected lean ore and tailings.
• Physical properties: White cubic crystal or powder; refractive index 1.434; density 3.18 g/cm3; hardness 4 Mohs; melts at 1,418°C; vaporizes at 2,533°C; insoluble in water (16 mg/L at 20°C); Ksp 3.9x10-11; slightly soluble in dilute mineral acid; soluble in concentrated acids (with reaction).

Refernces

Physiologic conditions affect toxicity of ingested industrial fluoride

10.1155/2013/439490

Richard Sauerheber investigates how physiological conditions, particularly calcium ion levels and pH, influence the toxicity of ingested industrial fluoride. The study calculates that blood fluoride concentrations causing lethal poisonings would significantly decrease calcium levels. It highlights that acute and chronic fluoride toxicity often involves altering calcium's chemical activity. Industrial fluorides, unlike natural calcium fluoride, are fully soluble and highly toxic. The research demonstrates that at stomach pH, fluoride primarily exists as hydrofluoric acid (HF), which is highly absorbable and corrosive. The study also discusses the chronic effects of fluoride, such as its accumulation in bones and potential harm to the heart, brain, and developing teeth. It criticizes the widespread practice of water fluoridation, arguing that it leads to various health issues and environmental concerns. The author concludes that adding industrial fluoride to drinking water is an ineffective and harmful public health policy, given the numerous adverse effects observed and the lack of substantial evidence supporting its dental benefits.