| Identification | More | [Name]
Sodium tungstate dihydrate | [CAS]
10213-10-2 | [Synonyms]
FOLIN
SODIUM O-TUNGSTATE, HYDROUS
SODIUM TUNGSTATE
SODIUM TUNGSTATE 2H2O
SODIUM TUNGSTATE-2-HYDRATE
SODIUM TUNGSTATE DIHYDRATE
SODIUM TUNGSTATE HYDRATED
SODIUM TUNGSTATE(VI) DIHYDRATE
SODIUM TUNGSTEN OXIDE
SODIUM TUNGSTEN OXIDE, DIHYDRATE
SODIUM WOLFRAMATE
SODIUM WOLFRAMATE DIHYDRATE
TUNGSTIC ACID NA-SALT 2H2O
TUNGSTIC ACID SODIUM SALT DIHYDRATE
Tungsticaciddisodiumsaltdihydrate
TUNGSTIC ACID SODIUM DIHYDRATE
SODIUM TUNGSTATE DIHYDRATE, 99%, A.C.S. REAGENT
SODIUM TUNGSTATE DIHYDRATE, 99.995%
SODIUM TUNGSTATE-2-HYDRATE PURE
SODIUM TUNGSTATE DIHYDRATE, ACS | [EINECS(EC#)]
236-743-4 | [Molecular Formula]
H4Na2O6W | [MDL Number]
MFCD00149190 | [Molecular Weight]
329.85 | [MOL File]
10213-10-2.mol |
| Chemical Properties | Back Directory | [Appearance]
white to slightly yellow crystalline powder or | [Melting point ]
698 °C(lit.)
| [bulk density]
1600kg/m3 | [density ]
4.18
| [storage temp. ]
Store at +15°C to +25°C. | [solubility ]
H2O: 1 M at 20 °C, clear, colorless
| [form ]
Solid | [color ]
White to slightly yellow | [Specific Gravity]
3.25 | [Odor]
Odorless | [PH]
9.5-11.5 (25℃, 1M in H2O) | [PH Range]
9 - 11.5 at 100 g/l at 20 °C | [Water Solubility ]
730 g/L (20 ºC) | [λmax]
λ: 260 nm Amax: ≤0.120
λ: 280 nm Amax: ≤0.035 | [Merck ]
14,8698 | [Exposure limits]
ACGIH: TWA 3 mg/m3
NIOSH: TWA 1 mg/m3; STEL 3 mg/m3 | [InChI]
1S/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1; | [InChIKey]
WPZFLQRLSGVIAA-UHFFFAOYSA-N | [SMILES]
O.O.[Na+].[Na+].[O-][W]([O-])(=O)=O | [CAS DataBase Reference]
10213-10-2(CAS DataBase Reference) | [EPA Substance Registry System]
Tungstate (WO42-), disodium, dihydrate, (T-4)- (10213-10-2) |
| Safety Data | Back Directory | [Symbol(GHS) ]
GHS07 | [Signal word ]
Warning | [Hazard statements ]
H302 | [Precautionary statements ]
P264-P270-P301+P312-P501 | [Hazard Codes ]
Xn | [Risk Statements ]
R22:Harmful if swallowed.
R36/38:Irritating to eyes and skin . | [Safety Statements ]
S36:Wear suitable protective clothing .
S37/39:Wear suitable gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . | [WGK Germany ]
1
| [RTECS ]
YO7900000
| [TSCA ]
Yes | [HS Code ]
28418000 | [Storage Class]
13 - Non Combustible Solids | [Hazard Classifications]
Acute Tox. 4 Oral | [Toxicity]
LD50 (mg tungstate/kg) in rabbits: 105 i.m.; in rats: 240 s.c. (Venugopal, Luckey) |
| Hazard Information | Back Directory | [Chemical Properties]
white to slightly yellow crystalline powder or | [Uses]
Fireproofing and waterproofing fabrics; preparing complex Compounds such as phosphotungstate and silicotungstate; as a protective colloid in biological development methods; precipitant for alkaloids; catalyst in oxidation reactions; corrosion inhibitor for steel. | [Definition]
ChEBI: A hydrate that is the dihydrate form of sodium tungstate. Combines with hydrogen peroxide for the oxidation of secondary amines to nitrones | [General Description]
Sodium tungstate dihydrate is a sodium salt of tungstic acid, which occurs as white colorless crystals. | [reaction suitability]
reagent type: catalyst
core: tungsten | [Synthesis]
Sodium tungstate can be obtained by reacting tungsten trioxide with sodium hydroxide solution, followed by evaporative crystallization, centrifugal dehydration and drying.
WO3+2NaOH+H2O→Na2WO4⋅2H2O
| [Purification Methods]
The salt crystallises from hot water (0.8mL/g) on cooling to 0o. [Grüttner & Jender in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1727 1965]. |
|
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