Calciumfluorid

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Warnung

• Gefahrenhinweise

  H303：May be harmfulif swallowed

  H315：Verursacht Hautreizungen.

  H319：Verursacht schwere Augenreizung.

  H335：Kann die Atemwege reizen.

• Sicherheit

  P261：Einatmen von Staub vermeiden.

  P304+P340：BEI EINATMEN: Die Person an die frische Luft bringen und für ungehinderte Atmung sorgen.

  P305+P351+P338：BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach Möglichkeit entfernen. Weiter spülen.

  P405：Unter Verschluss aufbewahren.

Calcium fluoride Chemische Eigenschaften,Einsatz,Produktion Methoden

• ERSCHEINUNGSBILD

  FARBLOSE KRISTALLEODER WEISSES HYGROSKOPISCHES PULVER.

• CHEMISCHE GEFAHREN

  Beim Verbrennen Bildung giftiger Fluorid-Rauche. Reagiert mit Mineralsäuren unter Bildungätzender Rauche.

• ARBEITSPLATZGRENZWERTE

  TLV: (Fluoride als F) 2,5 mg/m?(als TWA); Krebskategorie A4 (nicht klassifizierbar als krebserzeugend für den Menschen); BEI vorhanden; (ACGIH 2005).
  MAK: (Fluoride als F) (Einatembare Fraktion) 1 mg/m? Spitzenbegrenzung: überschreitungsfaktor II(4); Hautresorption; Schwangerschaft: Gruppe C; (DFG 2006).
  

• AUFNAHMEWEGE

  Aufnahme in den Körper durch Inhalation des Aerosols und durch Verschlucken.

• INHALATIONSGEFAHREN

  Verdampfung bei 20°C vernachlässigbar; eine gesundheitsschädliche Partikelkonzentration in der Luft kann jedoch beim Versprühen schnell erreicht werden.

• LECKAGE

  Verschüttetes Material in Behältern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste sorgfältig sammeln. An sicheren Ort bringen. Persönliche Schutzausrüstung: Atemschutzgerät, P2-Filter für schädliche Partikel.

• R-Sätze Betriebsanweisung:

  R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.

• S-Sätze Betriebsanweisung:

  S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
  S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
  S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.

• Beschreibung

  Calcium fluoride is colorless crystalline orwhite, powdery substance. Molecular weight=78.08;Specific gravity (H2O:1)=3.18 at 20℃; Boilingpoint=2495℃; Freezing/Melting point=1423℃. HazardIdentification (based on NFPA-704 M Rating System):Health 2, Flammability 0, Reactivity 0. Practically insolublein water.

• Chemische Eigenschaften

  Calcium fluoride, CaF2, also known as fluorite and feldspar, is a colorless solid composed of cubic crystals. It has a low water solubility, but is readily soluble in ammonium salt solutions. Calcium fluoride is used in the synthesis of hydrofluoric acid and in etching glass.
  Calcium Fluoride is not hygroscopic and is relatively inert. It has a sufficiently high resistance to thermal and mechanical shock, and it is easily fabricated into a variety of detector geometries.
  Calcium Fluoride has a very low vapor pressure, allowing it to be used in a wide variety of vacuum applications. It is insoluble in water and most organic solvents, permitting radioactive samples in solution to be placed in direct contact with the crystal.
  Calcium Fluoride is a transparent material used for detecting γ-rays up to several hundred keV and for detecting charged particles. Because of its low atomic number, the material’s photofraction is relatively small which limits its use in γ-ray spectrometry at higher energies. However, the low atomic number makes Calcium Fluoride an ideal material for the detection of β-particles because of the small amount of backscattering.

• Physikalische Eigenschaften

  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).

• Verwenden

  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.

• Verwenden

  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.

• Verwenden

  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.

• Definition

  A pure naturally occurring form of calcium fluoride.

• Vorbereitung Methode

  The commercial product is obtained from naturally occurring mineral fluorspar, which is purified and powdered. Also, it may be precipitated by mixing a solution of sodium fluoride with a soluble calcium salt:
  Ca(NO₃)₂ + 2NaF → CaF₂ + NaNO₃
  Alternatively, it may be obtained by treating calcium carbonate with hydrofluoric acid：CaCO₃ + 2HF → CaF₂ + CO₂ + H₂O.

• Definition

  A mineral form of calcium fluoride (CaF₂), used in making some cements and types of glass.

• Allgemeine Beschreibung

  Odorless gray powder or granules. Sinks in water.

• Reaktivität anzeigen

  Calcium fluoride has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.

• Hazard

  An irritant.

• Health Hazard

  Little acute toxicity

• Flammability and Explosibility

  Non flammable

• Industrielle Verwendung

  Also called fluorite, fluorspar is a crystalline or massive granular mineral of the composition CaF₂, used as a flux in the making of steel, for making hydrofluoric acid, in opalescent glass, in ceramic enamels, for snaking artificial cryolite, as a binder for vitreous abrasive wheels,and in the production of white cement. It is a better flux for steel than limestone, making a fluid slag, and freeing the iron of sulfur and phosphorus.
  Acid spar is a grade used in making hydrofluoric acid. It is also used for making refrigerants, plastics, and chemicals, and for aluminum reduction. Optical fluorspar is the highest grade but is not common. Fluoride crystals for optical lenses are grown artificially from acid-grade fluorspar. Pure calcium fluoride, Ca₂F₆, is a colorless crystalline powder used for etching glass, in enamels, and for reducing friction in machine bearings. It is also used for ceramic parts resistant to hydrofluoric acid and most other acids. Calcium fluorite has silicon in the molecule and is a crystalline powder used for enamels. The clear rhombic fluoride crystals used for transforming electric energy into light are lead fluoride, PbF₂.

• Sicherheitsprofil

  Moderately toxic by intraperitoneal route. Mildly toxic by ingestion. An experimental teratogen. Other experimental reproductive effects. Mutation data reported. See also FLUORIDES and CALCIUM COMPOUNDS. When heated to decomposition it emits toxic fumes of F-.

• mögliche Exposition

  Calcium fluoride is used for production of hydrofluoric acid; as a flux in steel manufacture; in smelting; electric arc welding, making glass and ceramics; and to fluoridate drinking water.

• Erste Hilfe

  If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for atleast 15 min, occasionally lifting upper and lower lids.Seek medical attention immediately. If this chemicalcontacts the skin, remove contaminated clothing and washimmediately with soap and water. Seek medical attentionimmediately. If this chemical has been inhaled, removefrom exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing hasstopped and CPR if heart action has stopped. Transferpromptly to a medical facility. When this chemicalhas been swallowed, get medical attention. A doctoror authorized paramedic may consider administeringaluminum hydroxide gel, if conscious.

• Lager

  Color Code—Green: General storage may be used.Store in tightly closed containers in a cool, well-ventilatedarea away from acids and chemically active metals (such aspotassium, sodium, magnesium, and zinc) because corrosivehydrogen fluoride will be produced.

• Versand/Shipping

  Calcium fluoride is not specifically covered by DOT in its Performance-Oriented Packaging Standards.

• Inkompatibilitäten

  Dust may form explosive mixture with air. Reacts with water, moist air, and steam, releasing flammable hydrogen gas; and may self-ignite in air. A strong reducing agent; incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Incompatible with metal halogenates, silver fluoride, and tetrahydrofuran

Calcium fluoride Upstream-Materialien And Downstream Produkte

Calciumfluorid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global(454)Suppliers

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