Dibutyltin oxide

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  • Identifiers

    CAS number
    818-08-6

    Molecular formula
    C8H18OSn

    SMILES
    CCCC[Sn](=O)CCCC

    Safety labels

    Corrosive
    Corrosive

    Acute Toxic
    Acute Toxic

    Health Hazard
    Health

  • Odor profile

    Fragrance
    Green 75.19%
    Herbal 68.82%
    Fruity 66.06%
    Sweet 47.92%
    Cheesy 46.88%
    Earthy 43.44%
    Oily 42.98%
    Spicy 39.23%
    Fatty 36.82%
    Musty 36.11%

     

    Flavor
    Herbal 43.15%
    Fruity 41.38%
    Sweet 36.98%
    Green 27.84%
    Fatty 27.39%
    Cheese 26.53%
    Spicy 26.31%
    Mushroom 25.92%
    Fresh 23.93%
    Ethereal 22.66%

     

  • Properties

    pKa est.
    4.51 (weak acid)

    Molecular weight
    248.94 g/mol

    Melting point expt.

    • 105 °C

    Boiling point

    • 161.9 °C

    Flash point

    • 85.77 ˚C est.

    Solubility expt.

    • Solubility in water, mg/l at 20 °C: 3.9-4.2 (very poor)

  • Synonyms

    • Dibutyltin oxide
    • 818-08-6
    • Dibutyloxotin
    • Dibutyloxostannane
    • Stannane, dibutyloxo-
    • Dibutylstannane oxide
    • dibutylstannanone
    • Dibutyloxide of tin
    • Dibutylstannium oxide
    • Tin, dibutyl-, oxide
    • T435H74FO0
    • NSC-28130
    • DTXSID4027315
    • RefChem:132969
    • DTXCID607315
    • 212-449-1
    • dibutyl(oxo)tin
    • Dibutyltin(IV) oxide
    • DI-N-BUTYLTIN OXIDE
    • Tin, dibutyloxo-
    • Di-n-butyl-zinn-oxyd
    • Kyslicnik di-n-butylcinicity
    • MFCD00001992
    • DBOT
    • Dibutyltinoxide
    • Stannane, dibutyloxo-;
    • Di-n-butyl-zinn-oxyd [German]
    • EINECS 212-449-1
    • Kyslicnik di-n-butylcinicity [Czech]
    • NSC 28130
    • BRN 4126243
    • UNII-T435H74FO0
    • dibutyl tinoxide
    • Dibutyltin-oxide
    • di-butyltin oxide
    • dibutyl tin oxide
    • dibutyl-tin-oxide
    • di-butyl tin oxide
    • dibutyl(oxo)stannum
    • di-n-butyltin-oxide
    • dibutyl(oxo)stannane
    • di-n-butyl tin oxide
    • dibutyltin (IV) oxide
    • di-n-butyl(oxo)stannane
    • dibutyl(oxidanylidene)tin
    • EC 212-449-1
    • SCHEMBL15123
    • Dibutyltin(IV) oxide, purum
    • DIBUTYLTIN OXIDE [MI]
    • Dibutyltin(IV) oxide, 98%
    • WLN: O-SN-4&4
    • NSC28130
    • AKOS015839513
    • NCGC00164074-01
    • NCI60_002289
    • DB-056553
    • NS00042353
    • D95293
    • EN300-6482113
    • A840199
    • Q2677909
    • F0001-2101
    • 818-08-6

  • Applications

    Dibutyltin oxide (CAS 818-08-6) is used in polymer and coating applications as a heat stabilizer and processing aid; it is widely employed as a heat stabilizer for PVC formulations to improve heat resistance and color stability; it acts as a catalyst for polyurethane formation in foams and coatings; it can serve as a catalyst or crosslinking mediator in epoxy and other resin systems used in coatings and adhesives; it functions as an intermediate in the synthesis of other organotin compounds, enabling the preparation of tin-based stabilizers and coupling agents; and it may be used as a precursor in organotin chemistry for diverse industrial applications.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1006.31
    methanol 994.13
    isopropanol 829.25
    water 1.0
    ethyl acetate 362.95
    n-propanol 905.61
    acetone 665.6
    n-butanol 759.96
    acetonitrile 317.53
    DMF 723.74
    toluene 372.82
    isobutanol 628.53
    1,4-dioxane 1046.94
    methyl acetate 325.68
    THF 1988.28
    2-butanone 536.85
    n-pentanol 514.41
    sec-butanol 677.92
    n-hexane 195.8
    ethylene glycol 192.05
    NMP 699.72
    cyclohexane 504.63
    DMSO 965.34
    n-butyl acetate 506.3
    n-octanol 365.32
    chloroform 1437.86
    n-propyl acetate 340.14
    acetic acid 406.55
    dichloromethane 1011.79
    cyclohexanone 1127.68
    propylene glycol 313.84
    isopropyl acetate 282.01
    DMAc 448.95
    2-ethoxyethanol 515.01
    isopentanol 526.97
    n-heptane 260.1
    ethyl formate 296.2
    1,2-dichloroethane 691.25
    n-hexanol 681.07
    2-methoxyethanol 786.41
    isobutyl acetate 273.65
    tetrachloromethane 343.71
    n-pentyl acetate 425.41
    transcutol 869.57
    n-heptanol 397.08
    ethylbenzene 179.94
    MIBK 351.86
    2-propoxyethanol 759.51
    tert-butanol 782.83
    MTBE 528.22
    2-butoxyethanol 479.68
    propionic acid 408.73
    o-xylene 219.06
    formic acid 126.49
    diethyl ether 645.18
    m-xylene 257.3
    p-xylene 211.05
    chlorobenzene 413.64
    dimethyl carbonate 116.97
    n-octane 103.17
    formamide 177.36
    cyclopentanone 1181.89
    2-pentanone 515.58
    anisole 293.41
    cyclopentyl methyl ether 782.71
    gamma-butyrolactone 930.75
    1-methoxy-2-propanol 615.23
    pyridine 819.21
    3-pentanone 366.56
    furfural 753.17
    n-dodecane 62.89
    diethylene glycol 484.63
    diisopropyl ether 230.36
    tert-amyl alcohol 547.4
    acetylacetone 401.37
    n-hexadecane 70.76
    acetophenone 280.3
    methyl propionate 286.86
    isopentyl acetate 442.67
    trichloroethylene 1003.79
    n-nonanol 317.63
    cyclohexanol 827.5
    benzyl alcohol 296.62
    2-ethylhexanol 409.91
    isooctanol 322.0
    dipropyl ether 546.33
    1,2-dichlorobenzene 369.92
    ethyl lactate 181.8
    propylene carbonate 502.78
    n-methylformamide 411.29
    2-pentanol 504.84
    n-pentane 236.63
    1-propoxy-2-propanol 616.2
    1-methoxy-2-propyl acetate 385.57
    2-(2-methoxypropoxy) propanol 278.03
    mesitylene 190.06
    ε-caprolactone 744.6
    p-cymene 187.11
    epichlorohydrin 917.23
    1,1,1-trichloroethane 665.96
    2-aminoethanol 413.14
    morpholine-4-carbaldehyde 661.2
    sulfolane 1123.24
    2,2,4-trimethylpentane 86.39
    2-methyltetrahydrofuran 1199.44
    n-hexyl acetate 462.1
    isooctane 79.5
    2-(2-butoxyethoxy)ethanol 428.22
    sec-butyl acetate 239.74
    tert-butyl acetate 350.48
    decalin 122.64
    glycerin 313.66
    diglyme 689.54
    acrylic acid 316.44
    isopropyl myristate 214.12
    n-butyric acid 574.71
    acetyl acetate 190.24
    di(2-ethylhexyl) phthalate 184.69
    ethyl propionate 243.79
    nitromethane 430.52
    1,2-diethoxyethane 497.63
    benzonitrile 404.11
    trioctyl phosphate 162.46
    1-bromopropane 652.18
    gamma-valerolactone 1105.31
    n-decanol 238.49
    triethyl phosphate 164.41
    4-methyl-2-pentanol 290.72
    propionitrile 467.78
    vinylene carbonate 423.89
    1,1,2-trichlorotrifluoroethane 580.68
    DMS 209.03
    cumene 137.19
    2-octanol 312.77
    2-hexanone 404.73
    octyl acetate 250.19
    limonene 308.64
    1,2-dimethoxyethane 701.43
    ethyl orthosilicate 178.92
    tributyl phosphate 173.13
    diacetone alcohol 392.12
    N,N-dimethylaniline 227.53
    acrylonitrile 432.0
    aniline 380.83
    1,3-propanediol 526.13
    bromobenzene 448.88
    dibromomethane 942.39
    1,1,2,2-tetrachloroethane 953.78
    2-methyl-cyclohexyl acetate 323.49
    tetrabutyl urea 242.27
    diisobutyl methanol 285.15
    2-phenylethanol 356.36
    styrene 231.17
    dioctyl adipate 249.47
    dimethyl sulfate 169.9
    ethyl butyrate 329.5
    methyl lactate 196.68
    butyl lactate 328.58
    diethyl carbonate 195.87
    propanediol butyl ether 420.95
    triethyl orthoformate 279.53
    p-tert-butyltoluene 189.27
    methyl 4-tert-butylbenzoate 322.25
    morpholine 1237.69
    tert-butylamine 549.11
    n-dodecanol 183.71
    dimethoxymethane 484.22
    ethylene carbonate 404.84
    cyrene 311.82
    2-ethoxyethyl acetate 382.01
    2-ethylhexyl acetate 375.5
    1,2,4-trichlorobenzene 398.65
    4-methylpyridine 622.4
    dibutyl ether 387.14
    2,6-dimethyl-4-heptanol 285.15
    DEF 423.05
    dimethyl isosorbide 523.0
    tetrachloroethylene 662.21
    eugenol 303.35
    triacetin 310.15
    span 80 383.42
    1,4-butanediol 253.13
    1,1-dichloroethane 707.32
    2-methyl-1-pentanol 363.9
    methyl formate 251.93
    2-methyl-1-butanol 492.87
    n-decane 109.82
    butyronitrile 573.12
    3,7-dimethyl-1-octanol 316.29
    1-chlorooctane 274.54
    1-chlorotetradecane 115.81
    n-nonane 117.61
    undecane 80.09
    tert-butylcyclohexane 107.69
    cyclooctane 170.33
    cyclopentanol 971.19
    tetrahydropyran 1446.43
    tert-amyl methyl ether 375.92
    2,5,8-trioxanonane 457.65
    1-hexene 389.13
    2-isopropoxyethanol 376.64
    2,2,2-trifluoroethanol 139.44
    methyl butyrate 341.13

    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