10213-10-2

Basic information

• Product Name: Sodium tungstate dihydrate
• Synonyms: SODIUM TUNGSTATE 2H2O;SODIUM TUNGSTATE-2-HYDRATE;SODIUM TUNGSTATE DIHYDRATE;SODIUM TUNGSTATE HYDRATED;SODIUM TUNGSTATE(VI) DIHYDRATE;TUNGSTIC ACID NA-SALT 2H2O;TUNGSTIC ACID SODIUM SALT DIHYDRATE;Tungsticaciddisodiumsaltdihydrate
• CAS NO: 10213-10-2
• Molecular Formula: 2H₂O*2Na*O₄W
• Molecular Weight: 329.85
• EINECS: 236-743-4
• Product Categories: metal tungstate
• Mol File: 10213-10-2.mol
• Article Data: 1

Chemical Properties

• Melting Point: 698 °C(lit.)
• Appearance: White to slightly yellow/Solid
• Density: 4.18
• Storage Temp.: Storage temperature: no restrictions.
• Solubility: H2O: 1 M at 20 °C, clear, colorless
• Water Solubility: 730 g/L (20 ºC)
• Merck: 14,8698
• CAS DataBase Reference: Sodium tungstate dihydrate(CAS DataBase Reference)
• NIST Chemistry Reference: Sodium tungstate dihydrate(10213-10-2)
• EPA Substance Registry System: Sodium tungstate dihydrate(10213-10-2)

Safety Data

• Hazard Codes: Xn
• Statements: 22-36/38-36
• Safety Statements: 36-37/39-26-39
• WGK Germany: 1
• RTECS: YO7900000
• TSCA: Yes
• Hazardous Substances Data: 10213-10-2(Hazardous Substances Data)

Usage

Chemical Properties

white to slightly yellow crystalline powder or

Uses

Different sources of media describe the Uses of 10213-10-2 differently. You can refer to the following data:
1. 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.
2. Sodium tungstate dihydrate is currently being investigated as a potential therapy for obesity. Sodium tungstate dihydrate is also an inhibitor of acid phosphatases.
3. Sodium tungstate dihydrate may be used in the preparation of aqueous sols of tungsten oxide dihydrate.

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.

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].

InChI:InChI=1/2Na.2H2O.4O.W/h;;2*1H2;;;;;/q2*+1;;;;;2*-1;/r2Na.O4W.2H2O/c;;1-5(2,3)4;;/h;;;2*1H2/q2*+1;-2;;

Synthetic route

tungsten(VI) oxide + sodium hydroxide (1310-73-2) → sodium tungstate (VI) dihydrate (10213-10-2)

Conditions	Yield
In acetic acid heating, filtration; evapn., crystn.;
In acetic acid heating, filtration; evapn., crystn.;

tungsten(VI) oxide + sodium carbonate (497-19-8) → sodium tungstate (VI) dihydrate (10213-10-2)

Conditions	Yield
In not given heating, filtration; evapn., crystn.;
In not given heating, filtration; evapn., crystn.;

ortho-tungstic acid + sodium hydroxide (1310-73-2) → sodium tungstate (VI) dihydrate (10213-10-2)

Conditions	Yield
In not given heating, filtration; evapn., crystn.;
In not given heating, filtration; evapn., crystn.;
In water for 0.333333h;

sodium carbonate (497-19-8) + ortho-tungstic acid → sodium tungstate (VI) dihydrate (10213-10-2)

Conditions	Yield
In not given heating, filtration; evapn., crystn.;
In melt leaching with boiling water, analogous react. with tungstenic ore; crystn.;
In not given heating, filtration; evapn., crystn.;
In melt leaching with boiling water, analogous react. with tungstenic ore; crystn.;

sodium tungstate decahydrate → sodium tungstate (VI) dihydrate (10213-10-2)

Conditions	Yield
above 6°C;
above 6°C;

sodium tungstate (VI) dihydrate (10213-10-2) + lead(II) nitrate → lead(II) tungstate

Conditions	Yield
In water equiv. amt. of Pb(NO3)2 and Na2WO4*2H2O dissolved in H2O are simultaneously added to H2O at equal flow rates (180 ml/min) with vigorous stirring(stirring rate 210 rpm); soln. decanted; filtered; ppt. washed (H2O); dried at 150°C;	99.8%
In water equiv. amt. of Pb(NO3)2 and Na2WO4*2H2O dissolved in H2O are simultaneously added to H2O at equal flow rates (15 ml/min) with vigorous stirring (stirring rate 300 rpm); soln. decanted; filtered; ppt. washed (H2O); dried at 150°C;	99.5%
In water equiv. amt. of Pb(NO3)2 and Na2WO4*2H2O dissolved in H2O are simultaneously added to H2O at equal flow rates (17 ml/min) with vigorous stirring (stirring rate 300 rpm); soln. decanted; filtered; ppt. washed (H2O); dried at 150°C;	99.7%

sodium tungstate (VI) dihydrate (10213-10-2) + disodium phosphate heptahydrate → (tetrabutylammonium)4H3PW11O39 (83721-04-4)

Conditions	Yield
With hydrogenchloride In water stirring (1 h, room temp.); washing (water and diethyl ether), drying (vac., 60°C); elem. anal.;	99%

Methyl 6-methylnicotinate (5470-70-2) + sodium tungstate (VI) dihydrate (10213-10-2) → 5-(methoxycarbonyl)-2-methylpyridine 1-oxide (49668-89-5)

Conditions	Yield
With dihydrogen peroxide In methanol; water	98%

sodium tungstate (VI) dihydrate (10213-10-2) + 2-nitrophenylphenyl sulfide → 2-nitrophenylphenyl sulfone

Conditions	Yield
With dihydrogen peroxide; tetra(n-butyl)ammonium hydrogen sulfate In toluene	97.8%

sodium tungstate (VI) dihydrate (10213-10-2) + 2-nitrophenylphenyl sulfide + benzyltrimethylammonium chloride (56-93-9) → 2-nitrophenylphenyl sulfone

Conditions	Yield
With sulfuric acid; dihydrogen peroxide In toluene	97.6%

sodium tungstate (VI) dihydrate (10213-10-2) + tetraphenylarsonium chloride (507-28-8, 14842-08-1) → 2As(C6H5)4(1+)*W2O3(O2)4(2-)=(As(C6H5)4)2[W2O3(O2)4]

Conditions	Yield
With hydrogenchloride; dihydrogen peroxide In water treatment of Na2WO4 soln. with 30% H2O2, pH adjustment to 2.5 (diltd. HCl), dropwise addn. of 2 equiv. Ph4AsCl (pptn.); filtration, washing (H2O, Et2O), drying in air; elem. anal.;	97%

sodium tungstate (VI) dihydrate (10213-10-2) + copper hydroxide (20427-59-2) + ethylenediamine (107-15-3) → [Cu(ethylenediamine)3]WO4

Conditions	Yield
In water for 48h;	97%

2-[[(4-chlorophenyl)thio]methyl]-1,4-difluorobenzene (470716-52-0) + sodium metabisulfite + sodium tungstate (VI) dihydrate (10213-10-2) → 2-[[(4-chlorophenyl)sulfonyl]methyl]-1,4-difluorobenzene (470716-51-9)

Conditions	Yield
With sulfuric acid; dihydrogen peroxide In n-heptane; water; toluene	96%

tellurium(IV) oxide (7446-07-3) + sodium tungstate (VI) dihydrate (10213-10-2) → Na2WTe4O12

Conditions	Yield
In water molar ratio W:Te=3:1, acid digestion bomb, 225°C, 4 d; then cooling to room temp. over 36 h;	96%
In neat (no solvent, solid phase) stoich. amts., heating in air (450°C, 6 h; then 580°C, 2 d; intermittent grinding);

sodium tungstate (VI) dihydrate (10213-10-2) + tetrahexylammonium chloride (5922-92-9) → 2N((CH2)5CH3)4(1+)*W2O3(O2)4(2-)=(N((CH2)5CH3)4)2[W2O3(O2)4]

Conditions	Yield
With hydrogenchloride; dihydrogen peroxide In water treatment of Na2WO4 soln. with 30% H2O2, pH adjustment to 2.5 (diltd. HCl), dropwise addn. of (C6H13)4NCl (pptn.); filtration, washing (H2O, Et2O), drying in air; elem. anal.;	96%

sodium tungstate (VI) dihydrate (10213-10-2) + copper(II) choride dihydrate + phosphoric acid (86119-84-8, 7664-38-2) + ethylenediamine (107-15-3) → [(Cu(ethylenediamine)2)3PW11CuClO39]*6H2O

Conditions	Yield
In water High Pressure; mixt. Na2WO4*2H2O, H3PO4, CuCl2*2H2O, ethylenediamine and water (pH 5) in polytetrafluoroethylene lined stainless stell autoclave was heated for80 h at 160°C and cooled to room temp. over 24 h; ppt. was filtered; elem. anal.;	95%

selenium(IV) oxide (7446-08-4) + sodium tungstate (VI) dihydrate (10213-10-2) + copper(II) choride dihydrate + cesium chloride + water (7732-18-5) → Cs6Na[(α-SeW9O33)2Cu3(H2O)3Cs3(H2O)6]*7H2O

Conditions	Yield
With sodium acetate buffer In water SeO2 and Na2WO4*2H2O added to soln. of CuCl2*2H2O (molar ratio 1:9:1.6) in sodium acetate buffer (pH 4.8); heated to 90°C for 1 h; cooled; solid CsCl added; ppt. isolated; air dried; elem. anal.;	95%

sodium tungstate (VI) dihydrate (10213-10-2) + potassium chloride + water (7732-18-5) + arsenic(III) trioxide → K14[WO(H2O)(α-AsW9O33)2]

Conditions	Yield
With HCl In water dissolved at 80°C with stirring, adjusted (HCl) pH to 6.3, kept at 80°C for 10 min, filtered, added KCl, stirred for 15 min; ppt. filtered, dried (80°C);	95%

sodium tungstate (VI) dihydrate (10213-10-2) + tetraoxo-μ-oxobis(pentamethylcyclopentadienyl)dimolybdenum(VI) + tetraphenylphosphonium bromide (2751-90-8) → P(C6H5)4(1+)*(C5(CH3)5)MoW5O18(1-)=P(C6H5)4(C5(CH3)5)MoW5O18

Conditions	Yield
With HNO3 In methanol; water byproducts: H2O; (C5(CH3)5)Mo2O5 in methanol was mixed with an aq. soln. of Na2WO4*2H2O, aq. HNO3 was added, stirring for 2 h, bromide salt in water was added; ppt. was filtered off, washed with small portions of water, methanol anddiethyl ether, dried under vac. at 70°C; elem. anal.;	95%

ziconium(IV) oxychloride octahydrate (13520-92-8) + sodium tungstate (VI) dihydrate (10213-10-2) → ZrW2O7((OH)1.5Cl0.5)*2H2O

Conditions	Yield
With hydrogenchloride In water at 160℃; Autoclave;	95%

sodium tungstate (VI) dihydrate (10213-10-2) + phosphoric acid (86119-84-8, 7664-38-2) + potassium chloride + water (7732-18-5) → K6[α-P2W18O62] * 14 water

Conditions	Yield
Stage #1: sodium tungstate (VI) dihydrate; phosphoric acid; water With hydrogenchloride for 24h; Reflux; Stage #2: potassium chloride at 80℃; for 72h;	95%

sodium tungstate (VI) dihydrate (10213-10-2) + diprop-2-en-1-yl pentanedioate (41226-64-6) + Aliquat 336 (5137-55-3) → Diglycidyl Glutarate (133548-06-8)

Conditions	Yield
With phosphoric acid; dihydrogen peroxide In water; toluene	94%

sodium tungstate (VI) dihydrate (10213-10-2) + tetraoxo-μ-oxobis(pentamethylcyclopentadienyl)ditungsten(VI) + tetrabutyl phosphonium bromide (3115-68-2) → P(C4H9)4(1+)*(C5(CH3)5)W6O18(1-)=P(C4H9)4(C5(CH3)5)W6O18

Conditions	Yield
With HNO3 In methanol; water byproducts: H2O; (C5(CH3)5)W2O5 in methanol was mixed with an aq. soln. of Na2WO4*2H2O, aq. HNO3 was added, stirring for 2 h, bromide salt in water was added; ppt. was filtered off, washed with small portions of water, methanol anddiethyl ether, dried under vac. at 70°C; elem. anal.;	94%

sodium tungstate (VI) dihydrate (10213-10-2) + tetraoxo-μ-oxobis(pentamethylcyclopentadienyl)dimolybdenum(VI) + 1-butylpyridinium bromide (874-80-6) → C4H9NC5H5(1+)*(C5(CH3)5)MoW5O18(1-)=C4H9NC5H5(C5(CH3)5)MoW5O18

Conditions	Yield
With HNO3 In methanol; water byproducts: H2O; (C5(CH3)5)Mo2O5 in methanol was mixed with an aq. soln. of Na2WO4*2H2O, aq. HNO3 was added, stirring for 2 h, bromide salt in water was added; ppt. was filtered off, washed with small portions of water, methanol anddiethyl ether, dried under vac. at 70°C; elem. anal.;	93%

[2,2]bipyridinyl (366-18-7) + sodium tungstate (VI) dihydrate (10213-10-2) + vanadyl(IV) sulphate pentahydrate + phosphoric acid (86119-84-8, 7664-38-2) + water (7732-18-5) → [V8O14(2,2'-bipyridine)8(PO4)2][PW11VO40](2,2'-bipyridine)*12H2O

Conditions	Yield
With HCl In water High Pressure; mixt. of W compd., V compd., bipyridine, H3PO4 and H2O was stirred; HCl was added to pH 1; heated at 180°C for 60 h under autogeneous pressure; cooled to room temp. over 44 h; filtered; washed (EtOH); elem. anal.;	92%

potassium permanganate (7722-64-7) + sodium tungstate (VI) dihydrate (10213-10-2) + cetyltrimethylammonim bromide (57-09-0) + boric acid (11113-50-1) + manganese(II) acetate (638-38-0, 993-02-2, 2180-18-9, 15411-95-7, 22981-23-3, 27004-39-3) → 4C16H33(CH3)3N(1+)*2H(1+)*Mn(3+)*H2O*BW11O39(9-)*10H2O=[C16H33(CH3)3N]4H2[Mn(H2O)BW11O39]*10H2O

Conditions	Yield
In water; 1,2-dichloro-ethane Mn and W salts mixed in H2O, treated with H3BO3, treated dropwise with excess of hexadecyltrimethylammonium bromide in water with stirring at 80-85°C; washed(water), dried (vac.), elem. anal.;	92%

sodium tungstate (VI) dihydrate (10213-10-2) + N,N-bis(3,5-di-t-butyl-2-hydroxybenzyl)-N',N'-dimethylethylenediamine (188713-27-1) → [dioxotungsten(VI)(O(2,4-bis-tert-butyl-phenyl)CH2N(CH2CH2N(CH3)2)CH2(2,4-bis-tert-butyl-phenyl)O)]

Conditions	Yield
With acetic acid In methanol for 2h; Reflux;	92%

sodium tungstate (VI) dihydrate (10213-10-2) + N,N-dioctadecylhydroxylamine → N-octadecyl-α-heptadecylnitrone (124029-68-1)

Conditions	Yield
With dihydrogen peroxide; sodium tungstate	91%
With dihydrogen peroxide; sodium tungstate	91%

sodium tungstate (VI) dihydrate (10213-10-2) + terbium(III, IV) oxide + calcium chloride → Ca0.92Tb0.08WO4

Conditions	Yield
With HNO3; cetyl-trimethyl-ammonium bromide In water High Pressure; Tb4O7 dissolved in HNO3, extra HNO3 removed by evapn., H2O added, appropriate amounts of Na2WO4*2H2O, then CaCl2 and CTAB added with stirring for half of h, heated in Teflon-lined stainless steel autoclave to 150°C for 12 h, cooled to room temp.; ppt. centrifuged, washed with H2O, EtOH, dried in air at 60°C for12 h;	90.73%

sodium tungstate (VI) dihydrate (10213-10-2) + 2-(3,4-dimethoxyphenyl)-ethylamine (120-20-7) → (3,4-dimethoxyphenyl)acetaldehyde oxime (131371-75-0)

Conditions	Yield
With dihydrogen peroxide In methanol; dichloromethane	90%

sodium tungstate (VI) dihydrate (10213-10-2) + phosphoric acid (86119-84-8, 7664-38-2) + potassium chloride → K6P2W18O62*14H2O, α

Conditions	Yield
With hydrogenchloride In water 0.91 equiv. of Na2WO4 (in H2O), 1.0 equiv. of 4 M HCl, 1.00 equiv. of 4 M H3PO4 was added slowly, reflux for >24 h, excess of KCl was added at room temp., ppt. was dried in air by aspiration, dissolved in H2O, 80 °C for 72 h; cooling, keeping at 4 °C for 24 h, elem. anal.;	90%
With hydrogenchloride In water 0.79 equiv. of Na2WO4 (in H2O), 0.8 equiv. of 4 M HCl, 0.26 equiv. of 2 M H3PO4 and 0.4 equiv. of 4 M HCl were added simultaneously, reflux for >24 h, excess of KCl was added at room temp., ppt. was dried, dissolved in H2O, 80 °C for >48 h; cooling, keeping at 4 °C for 24 h;	70%

sodium tungstate (VI) dihydrate (10213-10-2) + tributyltin chloride (1461-22-9) → (n-Bu3SnO)2WO2

Conditions	Yield
In water; acetone byproducts: NaCl; aq. soln. of Na2WO4 dropwise added with magnetic stirring to soln. of (C4H9)3SnCl in mixt. of H2O and acetone, stirred for 5 min; ppt. filtered off, washed with H2O, dried in air at 100°C; elem. anal.;	90%

sodium tungstate (VI) dihydrate (10213-10-2) + Na9(α-SbW9O33)*19.5H2O + cesium chloride + water (7732-18-5) → Cs26[Sb6W65O217(H2O)7]*50H2O

Conditions	Yield
With KCl; HCl In water dissolved Na9SbW9O33*19.5H2O, Na2WO4*2H2O, KCl, adjusted (HCl) pH to 1.0, boiled for 15 min, hot soln. filtered, added CsCl, stirred for 15 min; filtered, dried (air); elem. anal.;	90%

sodium tungstate (VI) dihydrate (10213-10-2) + benzoin oxime (441-38-3) → WO2(C6H5CHOC(NOH)C6H5)2*H2O

Conditions	Yield
With H2SO4 In ethanol; water 0.1 equiv. of Na2WO4*H2O was added to EtOH soln. of oxime-compd. at roomtemp., pH was adjusted to 2.5 with. concd. H2SO4; ppt. was filtered off, washed with EtOH:H2O=1:1 mixt. (v/v), elem. anal.;	90%

sodium tungstate (VI) dihydrate (10213-10-2) + phosphoric acid (86119-84-8, 7664-38-2) → Na20[P6W18O79]*37H2O

Conditions	Yield
With acetic acid In water at 100℃;	90%

Upstream product

• 1310-73-2 sodium hydroxide 
• 497-19-8 sodium carbonate 

Downstream Products

• 60263-96-9 2-(2-methylphenylmethylthio)-pyridine N-oxide 
• 60263-97-0 2-(2-Methylphenylmethylsulfonyl)-pyridine N-oxide 
• 160982-10-5 3-acetyl-5-chloro-2-thiophenesulfonamide 
• 102269-87-4 4-(4-methylphenylsulfonyl)phenylsulfonylacetic acid 
• 100181-71-3 (R,S)-isobutyl 3,4-epoxybutyrate 
• 144653-55-4 (4R,5R)-2-methyl-4-methanesulfonyloxymethyl-5-(4-methyl sulfonylphenyl)-2-oxazoline 
• 64759-82-6 methyl α-methylsulfonyl(p-dimethylaminophenyl)acetate 
• 14265-44-2 Phosphate 
• 7440-33-7 tungsten 
• 13520-76-8 tungsten dioxydichloride 
• 7647-14-5 sodium chloride 

Related news

Infrared absorption and differential scanning calorimetry studies of Sodium tungstate dihydrate (cas 10213-10-2) glasses containing iron oxide07/25/2019

A series of glass specimen [Na2WO4.2H2O]1−x[Fe2O3]x with x = 0, 0.10, 0.15, 0.20 and 0.25 were prepared. The infrared absorption spectra of these sodium tungstate dihydrate glass specimens containing iron oxide have been studied as a function of iron oxide. It was found that the addition of Fe2O...detailed

Relevant articles and documents

Magnetic and electrochemical behaviour of cobalt doped tungsten oxide (WO3) nanomaterials by microwave irradiation method

Nanocrystalline WO3·H2O nanopowders, doped with cobalt (2 and 5?wt%) have been synthesized using CoCl2·6H2O and Na2WO4·2H2O in a facile microwave irradiation process, followed by the annealing process. The samples were characterized with powder X-ray diffraction, field emission scanning electron microscopy, UV-VIS diffusion reflectance spectroscopy, photoluminescence spectroscopy and cyclic voltammetry (CV). X-ray diffraction patterns showed both undoped and Co doped WO3·H2O crystallized with orthorhombic phase. Annealing h-WO3at 600?°C 6?h in air resulted in the different products, W17O47(monoclinic) for undoped, WO3orthorhombic for 2?wt% Co doped and WO3(monoclinic) for 5?wt% Co doped. FE-SEM micrographs suggested that the dopants are able to influence the growth rate and morphology of the prepared nanopowders. UV-VIS-DRS spectra revealed that the dopant (Co ion) is incorporated in the intermediate energy level. Blue emissions (450–550?nm) were verified using PL at room temperature for the annealed samples (W17O47and WO3) with excitation wavelength 390?nm. The difference in peak intensity observed through PL spectra attributed to the possible distortions in WO42?tetrahedron group during microwave irradiation process. Electrochemical studies showed the possible enhanced catalytic behaviour of cobalt doped (5?wt%) as prepared samples than that of others. The temperature dependent magnetic susceptibility (300?K–2?K) and isothermal magnetization measurements showed the enhancement in magnetic behaviour of the samples for diamagnetic to antiferromagnetic nature which is clearly shows the incorporation of Cobalt ion at tungsten lattice site and in determining the resultant magnetic behaviour of the samples.