Sodium Selenite

Overview IFRA Request a quote

  • Identifiers

    CAS number
    10102-18-8

    Molecular formula
    Na2O3Se

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

    Safety labels

    Acute Toxic
    Acute Toxic

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Odorless 84.33%
    Sour 23.84%
    Sharp 17.13%
    Clean 15.59%
    Sweet 15.37%
    Milky 12.77%
    Bitter 12.64%
    Pungent 12.1%
    Buttery 11.36%
    Creamy 11.27%

     

    Flavor
    Odorless 68.73%
    Sour 29.63%
    Formyl 21.64%
    Mousy 21.21%
    Mild 20.72%
    Rotten 19.72%
    Soy 19.71%
    Yeast 19.55%
    Bland 19.4%
    Very mild 19.28%

     

  • Properties

    pKa est.
    -2.94 (strong acid)

    Molecular weight
    172.95 g/mol

    Melting point expt.

    • 1310 °F (decomposes) (NTP, 1992)
    • 710 °C (decomposes)

    Boiling point

    • Decomposes (NTP, 1992)

    Flash point

    • 70.76 ˚C est.

    Solubility expt.

    • greater than or equal to 100 mg/mL at 70.7 °F (NTP, 1992)
    • Insoluble in alcohol
    • 89.8 g/100 g water
    • Solubility in water, g/100ml at 20 °C: 85

  • Synonyms

    • SODIUM SELENITE
    • 10102-18-8
    • Disodium selenite
    • Natriumselenit
    • Selenious acid, disodium salt
    • Selenious Acid Disodium Salt
    • Disodium selenium trioxide
    • Selenite sodium
    • Pleo selene
    • Selenious acid, sodium salt (1:2)
    • Sodium selenite anhydrous
    • HIW548RQ3W
    • H2-O3-Se.1/2Na
    • Selenious acid (H2SeO3), disodium salt
    • DTXSID0032077
    • NSC-347466
    • DTXCID8012077
    • CHEBI:48843
    • Selenite, Sodium
    • Biselenite, Sodium
    • Selenite, Disodium
    • Selenite, Monosodium
    • RefChem:6247
    • Selenous Acid Disodium Salt
    • Selenite pentahydrate, Sodium
    • Pentahydrate, Sodium Selenite
    • Selenous Acid, Disodium Salt
    • 233-267-9
    • disodium;selenite
    • MFCD00003489
    • Sodium selenite (JAN)
    • SODIUM SELENITE [JAN]
    • 10102-18-8(disodiumsalt)7782-82-3(monosodiumsalt)
    • SODIUM SELENITE SE-75
    • dinatriumselenit
    • Natriumselenit [German]
    • SODIUM SELENITE (SELENIUM-75)
    • CCRIS 1260
    • HSDB 768
    • EINECS 233-267-9
    • NA2630
    • UNII-HIW548RQ3W
    • Aselend (TN)
    • Na2O3Se
    • EC 233-267-9
    • SCHEMBL24405
    • SODIUM SELENITE [MI]
    • SODIUM SELENITE [HSDB]
    • CHEMBL112302
    • SODIUM SELENITE [VANDF]
    • SODIUM SELENITE [WHO-DD]
    • Tox21_202977
    • SODIUM SELENITE [GREEN BOOK]
    • AKOS015912461
    • SODIUM SELENITE [EP MONOGRAPH]
    • FS05911
    • NSC 347466
    • Sodium selenite [NA2630] [Poison]
    • NCGC00260523-01
    • 10102-18-8(disodiumsalt); 7782
    • CAS-10102-18-8
    • NS00082555
    • D10530
    • Q414626
    • 10102-18-8(disodiumsalt); 7782-82-3(monosodiumsalt
    • 10102-18-8(disodiumsalt); 7782-82-3(monosodiumsalt)
    • 10102-18-8

  • Applications

    Sodium Selenite (CAS 10102-18-8) is used as a selenium source in agriculture and animal nutrition, supplying trace selenium to crops and feed formulations. It also serves as a reagent and starting material in the synthesis of organoselenium compounds and as a reference or oxidant in analytical chemistry laboratories. In the glass and ceramics industry, it is employed as a colorant precursor to yield selenium-based yellows and reds in glass and glazes. Additionally, it features in industrial applications as a selenium source and intermediate for selenium-related production and testing workflows.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 306.26
    methanol 422.23
    isopropanol 292.05
    water 160.5
    ethyl acetate 129.1
    n-propanol 207.62
    acetone 420.93
    n-butanol 197.08
    acetonitrile 210.65
    DMF 1253.28
    toluene 62.36
    isobutanol 156.91
    1,4-dioxane 310.91
    methyl acetate 159.57
    THF 497.77
    2-butanone 207.41
    n-pentanol 141.03
    sec-butanol 209.11
    n-hexane 34.12
    ethylene glycol 254.32
    NMP 593.99
    cyclohexane 45.08
    DMSO 1225.59
    n-butyl acetate 73.21
    n-octanol 104.82
    chloroform 123.85
    n-propyl acetate 92.89
    acetic acid 210.5
    dichloromethane 163.79
    cyclohexanone 180.99
    propylene glycol 174.38
    isopropyl acetate 105.66
    DMAc 731.59
    2-ethoxyethanol 287.41
    isopentanol 158.2
    n-heptane 35.32
    ethyl formate 139.34
    1,2-dichloroethane 166.5
    n-hexanol 116.65
    2-methoxyethanol 566.25
    isobutyl acetate 56.4
    tetrachloromethane 48.39
    n-pentyl acetate 84.75
    transcutol 292.38
    n-heptanol 96.65
    ethylbenzene 40.49
    MIBK 134.91
    2-propoxyethanol 237.34
    tert-butanol 358.85
    MTBE 219.08
    2-butoxyethanol 164.18
    propionic acid 123.79
    o-xylene 66.7
    formic acid 254.99
    diethyl ether 247.39
    m-xylene 62.37
    p-xylene 46.49
    chlorobenzene 55.43
    dimethyl carbonate 155.51
    n-octane 21.73
    formamide 386.54
    cyclopentanone 275.98
    2-pentanone 202.11
    anisole 113.5
    cyclopentyl methyl ether 218.71
    gamma-butyrolactone 253.01
    1-methoxy-2-propanol 415.1
    pyridine 170.33
    3-pentanone 151.86
    furfural 269.92
    n-dodecane 18.27
    diethylene glycol 282.89
    diisopropyl ether 93.48
    tert-amyl alcohol 244.38
    acetylacetone 208.44
    n-hexadecane 19.38
    acetophenone 107.31
    methyl propionate 159.0
    isopentyl acetate 62.62
    trichloroethylene 160.68
    n-nonanol 95.43
    cyclohexanol 156.35
    benzyl alcohol 106.89
    2-ethylhexanol 69.51
    isooctanol 75.48
    dipropyl ether 108.36
    1,2-dichlorobenzene 59.62
    ethyl lactate 87.36
    propylene carbonate 123.53
    n-methylformamide 418.78
    2-pentanol 180.67
    n-pentane 65.16
    1-propoxy-2-propanol 170.8
    1-methoxy-2-propyl acetate 106.79
    2-(2-methoxypropoxy) propanol 140.6
    mesitylene 51.85
    ε-caprolactone 136.01
    p-cymene 38.57
    epichlorohydrin 259.0
    1,1,1-trichloroethane 100.42
    2-aminoethanol 248.85
    morpholine-4-carbaldehyde 461.23
    sulfolane 419.13
    2,2,4-trimethylpentane 24.52
    2-methyltetrahydrofuran 252.98
    n-hexyl acetate 95.78
    isooctane 22.27
    2-(2-butoxyethoxy)ethanol 180.77
    sec-butyl acetate 62.77
    tert-butyl acetate 129.46
    decalin 18.02
    glycerin 288.51
    diglyme 286.35
    acrylic acid 132.93
    isopropyl myristate 60.29
    n-butyric acid 133.11
    acetyl acetate 85.89
    di(2-ethylhexyl) phthalate 57.43
    ethyl propionate 91.48
    nitromethane 371.15
    1,2-diethoxyethane 131.99
    benzonitrile 82.94
    trioctyl phosphate 53.59
    1-bromopropane 110.26
    gamma-valerolactone 298.52
    n-decanol 80.79
    triethyl phosphate 55.55
    4-methyl-2-pentanol 108.98
    propionitrile 136.48
    vinylene carbonate 112.79
    1,1,2-trichlorotrifluoroethane 227.11
    DMS 77.67
    cumene 35.78
    2-octanol 85.82
    2-hexanone 115.84
    octyl acetate 75.62
    limonene 59.26
    1,2-dimethoxyethane 406.91
    ethyl orthosilicate 54.27
    tributyl phosphate 52.77
    diacetone alcohol 208.01
    N,N-dimethylaniline 127.63
    acrylonitrile 166.4
    aniline 118.07
    1,3-propanediol 275.94
    bromobenzene 45.99
    dibromomethane 124.76
    1,1,2,2-tetrachloroethane 157.7
    2-methyl-cyclohexyl acetate 61.15
    tetrabutyl urea 92.37
    diisobutyl methanol 62.52
    2-phenylethanol 88.02
    styrene 48.29
    dioctyl adipate 74.77
    dimethyl sulfate 281.27
    ethyl butyrate 70.77
    methyl lactate 164.7
    butyl lactate 82.08
    diethyl carbonate 53.67
    propanediol butyl ether 144.36
    triethyl orthoformate 63.71
    p-tert-butyltoluene 44.05
    methyl 4-tert-butylbenzoate 122.68
    morpholine 341.23
    tert-butylamine 236.44
    n-dodecanol 69.15
    dimethoxymethane 575.82
    ethylene carbonate 95.8
    cyrene 146.25
    2-ethoxyethyl acetate 96.63
    2-ethylhexyl acetate 52.75
    1,2,4-trichlorobenzene 71.98
    4-methylpyridine 166.79
    dibutyl ether 80.61
    2,6-dimethyl-4-heptanol 62.52
    DEF 301.39
    dimethyl isosorbide 183.81
    tetrachloroethylene 127.49
    eugenol 137.43
    triacetin 94.86
    span 80 125.44
    1,4-butanediol 141.99
    1,1-dichloroethane 129.64
    2-methyl-1-pentanol 105.21
    methyl formate 310.45
    2-methyl-1-butanol 142.37
    n-decane 25.41
    butyronitrile 127.72
    3,7-dimethyl-1-octanol 77.83
    1-chlorooctane 55.56
    1-chlorotetradecane 32.91
    n-nonane 25.03
    undecane 21.1
    tert-butylcyclohexane 17.94
    cyclooctane 24.34
    cyclopentanol 200.19
    tetrahydropyran 204.04
    tert-amyl methyl ether 190.38
    2,5,8-trioxanonane 241.65
    1-hexene 68.39
    2-isopropoxyethanol 200.15
    2,2,2-trifluoroethanol 155.8
    methyl butyrate 112.58

    Scent© AI

1 4

IFRA standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 No restriction Category 7A
Rinse-off products applied to the hair with some hand contact
 No restriction
Category 2
Products applied to the axillae
 No restriction Category 7B
Leave-on products applied to the hair with some hand contact
 No restriction
Category 3
Products applied to the face/body using fingertips
 No restriction Category 8
Products with significant anogenital exposure
 No restriction
Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
 No restriction
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