| Identification | More | [Name]
TUNGSTEN | [CAS]
13472-45-2 | [Synonyms]
AMMONIUM TUNGSTATE (PARA)
AMMONIUM WOLFRAMATE
SODIUM O-TUNGSTATE
SODIUM PARA-TUNGSTATE
TUNGSTEN
TUNGSTEN AA SINGLE ELEMENT STANDARD
TUNGSTEN, AAS STANDARD SOLUTION
TUNGSTEN AA STANDARD
TUNGSTEN ATOMIC ABSORPTION STANDARD
TUNGSTEN ATOMIC SPECTROSCOPY STANDARD
TUNGSTEN ICP/DCP STANDARD
TUNGSTEN ICP STANDARD
TUNGSTEN METAL
TUNGSTEN PLASMA EMISSION SPECTROSCOPY STANDARD
TUNGSTEN PLASMA EMISSION STANDARD
TUNGSTEN, PLASMA STANDARD SOLUTION
TUNGSTEN RIBBON
TUNGSTEN SINGLE ELEMENT STANDARD
TUNGSTEN STANDARD
TUNGSTEN STANDARD SOLUTION | [EINECS(EC#)]
231-143-9 | [Molecular Formula]
W | [MDL Number]
MFCD00011461 | [Molecular Weight]
183.84 | [MOL File]
13472-45-2.mol |
| Chemical Properties | Back Directory | [Appearance]
Colorless crystals.Soluble
in water; insoluble in alcohol and acids. Noncom-
bustible.
| [Melting point ]
3410 °C(lit.)
| [Boiling point ]
5660 °C(lit.)
| [density ]
2.3 g/mL at 25 °C(lit.)
| [vapor pressure ]
0Pa at 25℃ | [solubility ]
H2O: soluble
| [form ]
wire
| [pka]
3.5[at 20 ℃] | [color ]
white rhombohedral crystals, crystalline | [Water Solubility ]
g/100g H2O: 71.5 (0°C), 73.0 (20°C), 97.2 (100°C) [LAN05] | [Merck ]
13,8772 | [LogP]
0 | [Uses]
Intermediate in preparation of tungsten com-
pounds, (e.g., phosphotungstate), reagent, fire-
proofing fabrics and cellulose, alkaloid precipitant.
| [CAS DataBase Reference]
13472-45-2(CAS DataBase Reference) | [EPA Substance Registry System]
Sodium tungsten oxide (Na2WO4) (13472-45-2) |
| Hazard Information | Back Directory | [Chemical Properties]
Colorless crystals.Soluble
in water; insoluble in alcohol and acids. Noncom-
bustible.
| [Definition]
ChEBI: An inorganic sodium salt having tungstate as the counterion. Combines with hydrogen peroxide for the oxidation of secondary amines to nitrones. | [Preparation]
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. | [Flammability and Explosibility]
Notclassified |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/38:Irritating to eyes and skin . | [Safety Statements ]
S6:Keep under ... (inert gas to be specified by the manufacturer) .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [RIDADR ]
UN 3089 4.1/PG 2
| [WGK Germany ]
3
| [RTECS ]
YO7175000
| [HazardClass ]
6.1(b) | [PackingGroup ]
III | [Safety Profile]
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. | [Hazardous Substances Data]
13472-45-2(Hazardous Substances Data) |
|
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AKASH PHARMA EXPORTS
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Micron Platers
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