Sodium tungstate

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  • Identifiers

    CAS number
    13472-45-2

    Molecular formula
    Na2O4W

    SMILES
    [O-][W](=O)(=O)[O-].[Na+].[Na+]

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 89.8%
    Sour 21.59%
    Sharp 15.12%
    Clean 13.65%
    Pungent 11.23%
    Burnt 10.4%
    Bitter 10.33%
    Sweet 9.69%
    Ethereal 9.6%
    Winey 9.31%

     

    Flavor
    Odorless 56.85%
    Bitter 32.89%
    Bland 22.14%
    Sour 21.92%
    Formyl 21.06%
    Mousy 19.86%
    Rotten 19.82%
    Urine 19.58%
    Nitrile 19.03%
    Yeast 18.98%

     

  • Properties

    pKa est.
    -12.37 (strong acid)

    Molecular weight
    293.82 g/mol

    Melting point expt.

    • 698 °C

    Flash point

    • 79.74 ˚C est.

    Solubility expt.

    • Colorless crystals or white crystalline powder; loses its water @ 100 °C; aq soln is slightly alkaline, pH 8-9; effloresces in dry air; sol in about 1.1 parts water; insol in alc /Dihydrate/
    • SLIGHTLY SOL IN AMMONIA; INSOL IN ACID /DIHYDRATE/
    • SOL 57.5 G/100 CC WATER @ 0 °C; 73.2 G @ 21 °C; 96.9 G @ 100 °C

  • Synonyms

    • SODIUM TUNGSTATE
    • 13472-45-2
    • Disodium tungstate
    • Sodium wolframate
    • Sodium tungstate(VI)
    • Sodium tungsten oxide (Na2WO4)
    • Sodium tungstate (Na2WO4)
    • Tungstic acid, disodium salt
    • Disodium tungstate (Na2WO4)
    • CCRIS 5814
    • Sodium tungstate (Na2(WO4))
    • Disodium tetraoxatungstate (2-)
    • Disodium tetraoxotungstate (2-)
    • HSDB 5057
    • Sodium tungstate(VI) (Na2WO4)
    • EINECS 236-743-4
    • UNII-64LRH4405G
    • Na2WO4
    • Disodium tetraoxotungstate
    • sodium tetraoxotungstate(VI)
    • Disodium tetraoxatungstate(2-)
    • Disodium tetraoxotungstate(2-)
    • Tungstate (WO42-), disodium, (beta-4)-
    • CHEBI:63940
    • Tungastate (WO4(2-)), disodium, (T-4)-
    • EC 236-743-4
    • SODIUM TUNGSTATE(VI) [MI]
    • Tungstate (WO42-), sodium (1:2), (T-4)-
    • DISODIUM TUNGSTATE [NA2WO4]
    • SODIUM TUNGSTATE [NA2(WO4)]
    • RefChem:184145
    • Disodium tetraoxatungstate (2)
    • Disodium tetraoxotungstate (2)
    • DTXSID4021420
    • Tungastate (WO4(2-)), disodium, (T-4)-(9CI)
    • 236-743-4
    • Disodium tungsten(VI) oxide
    • disodium dioxido(dioxo)tungsten
    • Tungstate, sodium
    • disodium;dioxido(dioxo)tungsten
    • Tungstic acid (H2WO4), disodium salt
    • Tungstate (WO42-), disodium, (T-4)-
    • 64LRH4405G
    • Disodium wolframate
    • Sodiumtungstate(VI)
    • sodium tungstate (VI)
    • Tungstate (W10O324-), sodium (1:4)
    • SCHEMBL60232
    • AKOS030227979
    • GS-3112
    • NS00093533
    • Q418410
    • tungsten(4+) ion disodium dihydroxide dioxidandiide
    • 13472-45-2

  • Applications

    Sodium tungstate (CAS 13472-45-2) is widely used as a tungsten source for chemical synthesis and materials manufacturing, including as a precursor to tungsten oxide compounds and catalysts; in glass and ceramic formulations it is used as a flux and to influence color and melting behavior; it provides tungsten for tungstate-based phosphors and related pigments used in lighting, displays, and ceramics; it can function as a corrosion inhibitor in metalworking and concrete protection applications, where alternatives to chromates are pursued under regulatory controls; in laboratories it serves as a versatile reagent and tungsten source for inorganic synthesis and analytical work; and it acts as a precursor to tungsten oxide–based materials for electronics, sensors, and protective coatings, with use governed by local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 495.38
    methanol 685.61
    isopropanol 462.13
    water 240.28
    ethyl acetate 257.02
    n-propanol 338.51
    acetone 653.49
    n-butanol 328.96
    acetonitrile 346.88
    DMF 1764.05
    toluene 139.92
    isobutanol 240.98
    1,4-dioxane 481.14
    methyl acetate 268.03
    THF 818.11
    2-butanone 334.16
    n-pentanol 235.41
    sec-butanol 347.35
    n-hexane 82.93
    ethylene glycol 395.18
    NMP 871.45
    cyclohexane 103.29
    DMSO 1725.41
    n-butyl acetate 133.29
    n-octanol 205.33
    chloroform 367.35
    n-propyl acetate 171.02
    acetic acid 335.89
    dichloromethane 432.57
    cyclohexanone 272.22
    propylene glycol 285.9
    isopropyl acetate 213.07
    DMAc 1039.77
    2-ethoxyethanol 518.13
    isopentanol 251.42
    n-heptane 85.62
    ethyl formate 244.15
    1,2-dichloroethane 372.59
    n-hexanol 219.96
    2-methoxyethanol 997.83
    isobutyl acetate 103.91
    tetrachloromethane 139.03
    n-pentyl acetate 158.76
    transcutol 461.91
    n-heptanol 183.05
    ethylbenzene 92.01
    MIBK 242.17
    2-propoxyethanol 435.89
    tert-butanol 556.0
    MTBE 375.75
    2-butoxyethanol 294.58
    propionic acid 208.42
    o-xylene 144.09
    formic acid 403.74
    diethyl ether 483.42
    m-xylene 144.07
    p-xylene 101.49
    chlorobenzene 117.81
    dimethyl carbonate 293.5
    n-octane 51.79
    formamide 628.98
    cyclopentanone 438.04
    2-pentanone 359.16
    anisole 219.03
    cyclopentyl methyl ether 421.89
    gamma-butyrolactone 414.73
    1-methoxy-2-propanol 773.26
    pyridine 285.74
    3-pentanone 292.29
    furfural 429.21
    n-dodecane 43.09
    diethylene glycol 511.63
    diisopropyl ether 202.83
    tert-amyl alcohol 389.87
    acetylacetone 374.75
    n-hexadecane 45.91
    acetophenone 198.96
    methyl propionate 314.25
    isopentyl acetate 111.52
    trichloroethylene 371.55
    n-nonanol 186.87
    cyclohexanol 274.2
    benzyl alcohol 189.53
    2-ethylhexanol 129.72
    isooctanol 139.79
    dipropyl ether 225.78
    1,2-dichlorobenzene 136.01
    ethyl lactate 169.05
    propylene carbonate 218.87
    n-methylformamide 656.52
    2-pentanol 321.92
    n-pentane 151.03
    1-propoxy-2-propanol 316.78
    1-methoxy-2-propyl acetate 194.93
    2-(2-methoxypropoxy) propanol 235.9
    mesitylene 120.46
    ε-caprolactone 229.48
    p-cymene 87.49
    epichlorohydrin 464.69
    1,1,1-trichloroethane 249.21
    2-aminoethanol 393.61
    morpholine-4-carbaldehyde 722.52
    sulfolane 677.95
    2,2,4-trimethylpentane 59.96
    2-methyltetrahydrofuran 426.9
    n-hexyl acetate 180.26
    isooctane 52.41
    2-(2-butoxyethoxy)ethanol 295.36
    sec-butyl acetate 122.76
    tert-butyl acetate 251.16
    decalin 43.52
    glycerin 499.1
    diglyme 473.92
    acrylic acid 216.28
    isopropyl myristate 115.2
    n-butyric acid 239.94
    acetyl acetate 163.88
    di(2-ethylhexyl) phthalate 100.73
    ethyl propionate 187.62
    nitromethane 594.48
    1,2-diethoxyethane 232.04
    benzonitrile 140.83
    trioctyl phosphate 99.17
    1-bromopropane 248.18
    gamma-valerolactone 460.2
    n-decanol 156.25
    triethyl phosphate 108.78
    4-methyl-2-pentanol 196.45
    propionitrile 235.5
    vinylene carbonate 193.08
    1,1,2-trichlorotrifluoroethane 411.26
    DMS 144.73
    cumene 81.14
    2-octanol 159.86
    2-hexanone 199.93
    octyl acetate 139.86
    limonene 123.77
    1,2-dimethoxyethane 686.51
    ethyl orthosilicate 110.69
    tributyl phosphate 95.74
    diacetone alcohol 373.33
    N,N-dimethylaniline 253.31
    acrylonitrile 289.15
    aniline 219.22
    1,3-propanediol 457.79
    bromobenzene 108.83
    dibromomethane 331.31
    1,1,2,2-tetrachloroethane 387.63
    2-methyl-cyclohexyl acetate 119.13
    tetrabutyl urea 166.04
    diisobutyl methanol 119.07
    2-phenylethanol 167.14
    styrene 103.47
    dioctyl adipate 132.16
    dimethyl sulfate 516.72
    ethyl butyrate 138.47
    methyl lactate 320.67
    butyl lactate 148.5
    diethyl carbonate 104.95
    propanediol butyl ether 254.09
    triethyl orthoformate 123.9
    p-tert-butyltoluene 98.37
    methyl 4-tert-butylbenzoate 228.75
    morpholine 547.61
    tert-butylamine 394.6
    n-dodecanol 132.25
    dimethoxymethane 1079.59
    ethylene carbonate 166.98
    cyrene 256.66
    2-ethoxyethyl acetate 173.46
    2-ethylhexyl acetate 96.81
    1,2,4-trichlorobenzene 151.36
    4-methylpyridine 274.53
    dibutyl ether 156.93
    2,6-dimethyl-4-heptanol 119.07
    DEF 519.54
    dimethyl isosorbide 326.77
    tetrachloroethylene 302.72
    eugenol 243.44
    triacetin 172.32
    span 80 207.99
    1,4-butanediol 232.04
    1,1-dichloroethane 296.01
    2-methyl-1-pentanol 173.17
    methyl formate 491.11
    2-methyl-1-butanol 229.39
    n-decane 61.3
    butyronitrile 220.09
    3,7-dimethyl-1-octanol 148.08
    1-chlorooctane 130.11
    1-chlorotetradecane 71.47
    n-nonane 61.82
    undecane 50.18
    tert-butylcyclohexane 43.52
    cyclooctane 63.42
    cyclopentanol 336.12
    tetrahydropyran 339.02
    tert-amyl methyl ether 342.33
    2,5,8-trioxanonane 393.18
    1-hexene 142.54
    2-isopropoxyethanol 351.68
    2,2,2-trifluoroethanol 253.93
    methyl butyrate 213.28

    Scent© AI

1 4

IFRA standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
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Rinse-off products applied to the hair with some hand contact
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Category 2
Products applied to the axillae
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Leave-on products applied to the hair with some hand contact
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Category 3
Products applied to the face/body using fingertips
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Products with significant anogenital exposure
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Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
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Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 No restriction Category 10A
Household care products with mostly hand contact
 No restriction
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 No restriction Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 No restriction
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 No restriction Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 No restriction
Category 5D
Baby Creams, baby Oils and baby talc
 No restriction Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 No restriction
Category 6
Products with oral and lip exposure
 No restriction Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 No restriction