Wolframs?ure, Dinatrium-Salz
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- CAS-Nr.
- 13472-45-2
- Bezeichnung:
- Wolframs?ure, Dinatrium-Salz
- Englisch Name:
- Sodium tungstate
- Synonyma:
- Na2WO4;TUNGSTEN METAL;AMMONIUM WOLFRAMATE;W HC 40;TUNGSTEN RIBBON;SODIUM TUNGSTATE;SODIUM TUNGSTATE;disodiumtungstate;SODIUMTUNGSTENATE;Tungstate, sodium
- CBNumber:
- CB1188314
- Summenformel:
- Na2WO4
- Molgewicht:
- 293.82
- MOL-Datei:
- 13472-45-2.mol
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Wolframs?ure, Dinatrium-Salz Eigenschaften
- Schmelzpunkt:
- 3410 °C(lit.)
- Siedepunkt:
- 5660 °C(lit.)
- Dichte
- 2.3 g/mL at 25 °C(lit.)
- Dampfdruck
- 0Pa at 25℃
- L?slichkeit
- H2O: soluble
- pka
- 3.5[at 20 ℃]
- Aggregatzustand
- wire
- Farbe
- white rhombohedral crystals, crystalline
- Wasserl?slichkeit
- g/100g H2O: 71.5 (0°C), 73.0 (20°C), 97.2 (100°C) [LAN05]
- Merck
- 13,8772
- LogP
- 0
- CAS Datenbank
- 13472-45-2(CAS DataBase Reference)
- EPA chemische Informationen
- Sodium tungsten oxide (Na2WO4) (13472-45-2)
Wolframs?ure, Dinatrium-Salz Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R36/38:Reizt die Augen und die Haut.
S-S?tze Betriebsanweisung:
S6:Unter . . . aufbewahren (inertes Gas vom Hersteller anzugeben).
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
Sodium tungstate is a sodium salt of orthotungstate. It is a colorless crystals or white crystalline powder. Soluble in water; insoluble in alcohol and acids. noncombustible. Sodium tungstate has three crystalline forms, δ, γ and β. The transition temperature from δ to γ is about 570℃, and from γ to β is about 585℃. In hydrogen is heated to 700 ℃ also does not change, to 1100 ℃ will become metal tungsten.
Verwenden
Intermediate in preparation of tungsten compounds, (e.g., phosphotungstate), reagent, fire-proofing fabrics and cellulose, alkaloid precipitant.
Definition
ChEBI: Sodium tungstate is an inorganic sodium salt having tungstate as the counterion. Combines with hydrogen peroxide for the oxidation of secondary amines to nitrones. It has a role as a reagent. It contains a tungstate.
synthetische
Sodium tungstate is obtained by digestion of tungsten ores, the economically important representatives of which are tungstates, in base. Illustrative is the extraction of sodium tungstate from wolframite:
Fe/MnWO4 + 2 NaOH + 2 H2O → Na2WO4?2H2O + Fe/Mn(OH)2
Sodium tungstate can also be produced by treating tungsten carbide with a mixture of sodium nitrate and sodium hydroxide in a fusion process which overcomes the high exothermicity of the reaction involved.
Sicherheitsprofil
Poison by ingestion, intravenous, intramuscular, and subcutaneous routes. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of Na2O. See also TUNGSTEN COMPOUNDS.
Wolframs?ure, Dinatrium-Salz Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
Wolframs?ure, Dinatrium-Salz Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.
Global( 56)Lieferanten
13472-45-2(Wolframs?ure, Dinatrium-Salz)Verwandte Suche:
- AMMONIUM TUNGSTATE (PARA)
- SODIUM O-TUNGSTATE
- SODIUM PARA-TUNGSTATE
- W HC 40
- TUNGSTEN AA SINGLE ELEMENT STANDARD
- TUNGSTEN, AAS STANDARD SOLUTION
- TUNGSTEN AA STANDARD
- TUNGSTEN ATOMIC ABSORPTION STANDARD
- TUNGSTEN ATOMIC SPECTROSCOPY STANDARD
- TUNGSTEN ICP/DCP STANDARD
- disodiumtetraoxotungstate(2-)
- disodiumtungstate
- disodiumtungstate[na2wo4]
- sodiumtungstate(na2wo4)
- sodiumtungstate(vi
- sodiumtungstate(vi)
- sodiumtungstate(vi)(na2wo4)
- TUNGSTEN ATOMIC SPECTROSCOPY STD. CONC. 1.00 G W, AMPOULE
- SodiumTungstateA.R.
- sodium tungstate solution
- tungsten atomic spectroscopy standard concentrate 1.00 g w
- SODIUMTUNGSTENATE
- Dinatriumwolframat
- SODIUM TUNGSTATE(VI) ANHYDROUS
- Sodium wolphramate
- Disodium dioxido(dioxo)tungsten
- Tungstate, sodium
- Tungsten atomic spectroscopy standard concentrate 1.00g W,Sodium tungstate solution
- "Sodium tungstate, dihydrate/ 99+%"
- sodium o-tungstate,anhydrous
- TUNGSTEN###Sodium tungstate dihydrate
- (beta-4)-tungstate(wo42-disodium
- TUNGSTEN ICP STANDARD
- TUNGSTEN STANDARD SOLUTION
- TUNGSTEN SINGLE ELEMENT STANDARD
- TUNGSTEN STANDARD
- TUNGSTEN PLASMA EMISSION SPECTROSCOPY STANDARD
- TUNGSTEN PLASMA EMISSION STANDARD
- TUNGSTEN, PLASMA STANDARD SOLUTION
- TUNGSTEN RIBBON
- disodium,(T-4)-Tungstate
- disodium,(t-4)-tungstate(wo4(2-)
- disodiumtetraoxatungstate(2-)
- sodiumtungstate[na2(wo4)]
- sodiumtungstateanhydrous
- sodiumtungstenoxide(na2wo4)
- Tungstate (WO42-), disodium, (T-4)-
- Tungstate (WO42-), disodium, (T-4)-
- Tungstate, disodium, (T-4)-
- Tungstic acid, disodium salt
- tungsticacid,disodiumsalt
- tungsticacid[h2wo4],disodiumsalt
- Tungsticaciddisodiumsalt
- Sodium tungsten oxide, Folin Reagent Grade
- disodium wolframate
- SODIUM TUNGSTATE
- SODIUM TUNGSTATE
- Sodium Tungstate Test Solution
