Tris(2-butoxyethyl) phosphate

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  • Identifiers

    CAS number
    78-51-3

    Molecular formula
    C18H39O7P

    SMILES
    CCCCOCCOP(=O)(OCCOCCCC)OCCOCCCC

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Fruity 42.21%
    Alcoholic 40.64%
    Odorless 32.65%
    Ethereal 32.14%
    Oily 29.81%
    Fresh 25.92%
    Sweet 25.85%
    Fermented 24.76%
    Herbal 22.3%
    Winey 18.59%

     

    Flavor
    Fruity 38.99%
    Fatty 34.62%
    Sweet 30.89%
    Vegetable 30.24%
    Green 29.7%
    Oily 26.66%
    Mushroom 26.49%
    Waxy 26.16%
    Earthy 25.64%
    Tropical 24.03%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    2.8

    pKa est.
    5.34 (weak acid)

    Molecular weight
    398.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Melting point expt.

    • -94 °F (NTP, 1992)
    • -70 °C

    Boiling point

    • 392 to 446 °F at 4 mmHg (NTP, 1992)
    • BP: 215-228 °C at 4 mm Hg
    • BP: 200-230 °C at 4 mm Hg
    • BP: 255 °C at 10 mm Hg

    Flash point

    • 190.74 ˚C est.
    • 435 °F (NTP, 1992)
    • >113 °C (>235 °F) (Closed cup)

    Solubility expt.

    • Soluble (NTP, 1992)
    • In water, 1,100 mg/L at 25 °C
    • SOL IN MINERAL OILS & MOST ORG LIQ
    • Insoluble or limited solubility in glycerol, glycols, certain amines; soluble in most organic liquids

  • Synonyms

    • Tris(2-butoxyethyl) phosphate
    • 78-51-3
    • TBEP
    • TRI(2-BUTOXYETHYL) PHOSPHATE
    • Tributoxyethyl phosphate
    • Phosflex T-bep
    • Tris(butoxyethyl) phosphate
    • Tributyl cellosolve phosphate
    • KP 140
    • Ethanol, 2-butoxy-, phosphate (3:1)
    • Phosphoric acid, tributoxyethyl ester
    • Phosphoric acid, tris(2-butoxyethyl) ester
    • Tris(butoxyethyl)phosphate
    • 2-Butoxyethanol, phosphate
    • Tris-(2-butoxyethyl)fosfat
    • Tri(2-butoxyethanol) phosphate
    • DTXSID5021758
    • 2-Butoxyethanol phosphate (3:1)
    • Ethanol, 2-butoxy-, 1,1',1''-phosphate
    • RYA6940G86
    • NSC-4839
    • NSC-62228
    • DTXCID201758
    • CHEBI:35038
    • RefChem:192076
    • 201-122-9
    • tris(2-butoxyethyl)phosphate
    • Kronitex KP-140
    • Tri(butoxyethyl) phosphate
    • Tri(2-butoxyethanol)phosphate
    • Phosphoric Acid Tris(2-butoxyethyl) Ester
    • NSC 4839
    • MFCD00009456
    • 2-Butoxyethanol phosphate
    • Tris(2-butyloxyethyl)phosphate
    • TBEP;KP 140;Hostaphat B 310
    • Phosphoric acid, tri-(2-butoxyethyl) ester
    • Ethanol, phosphate (3:1)
    • WLN: 4O2OPO&O2O4&O2O4
    • CAS-78-51-3
    • Phosphoric acid, tri(butoxyethyl) ester
    • TBOEP
    • CCRIS 5942
    • HSDB 2564
    • EINECS 201-122-9
    • Tris-(2-butoxyethyl)fosfat [Czech]
    • Tris(2-butoxyethyl) phosphate,C18H39O7P,78-51-3
    • BRN 1716010
    • tris-2-butoxyethyl phosphate
    • UNII-RYA6940G86
    • AI3-04596
    • Amgard TBEP
    • tris[2-(butyloxy)ethyl] phosphate
    • EC 201-122-9
    • NCIOpen2_007840
    • SCHEMBL37268
    • 4-01-00-02422 (Beilstein Handbook Reference)
    • BIDD:ER0626
    • tris-(2-butoxyethyl)phosphate
    • orb1987335
    • orb3025008
    • CHEMBL1534811
    • NSC4839
    • NSC62228
    • 2-Butoxy-ethanol phosphate (3:1)
    • Tox21_201593
    • Tox21_302891
    • MSK001323
    • Tris(2-butoxyethyl) phosphate, 94%
    • AKOS015839670
    • NCGC00091600-01
    • NCGC00091600-02
    • NCGC00091600-03
    • NCGC00256553-01
    • NCGC00259142-01
    • Tris(2-butoxyethyl)ester phosphoric acid
    • AS-59809
    • CS-0066127
    • NS00010389
    • P0683
    • Phosphoric acid tris(2-n-butoxyethyl) ester
    • TRI(2-BUTOXYETHYL) PHOSPHATE [HSDB]
    • F71229
    • F614800
    • Tris(2-butoxyethyl) phosphate, analytical standard
    • Q27116378
    • 78-51-3

  • Applications

    Tris(2-butoxyethyl) phosphate is primarily used as a plasticizer for PVC and other polymers, increasing the flexibility of films, coatings, adhesives, and sealants. It is also employed as a flame retardant additive for polymers and coatings, particularly in cable insulation and electronic materials. In polymer systems such as polyurethanes and epoxies, TBEP acts as a plasticizer and/or flame retardant additive to aid processing and improve thermal stability. TBEP is used as an additive in coatings, inks, and adhesives to enhance flexibility and fire performance. It is also considered a processing aid in resin formulations to optimize workability and fire resistance. Use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 129.44
    methanol 192.63
    isopropanol 112.57
    water 8.77
    ethyl acetate 861.59
    n-propanol 157.6
    acetone 712.78
    n-butanol 125.05
    acetonitrile 662.96
    DMF 1685.15
    toluene 345.97
    isobutanol 134.15
    1,4-dioxane 576.22
    methyl acetate 912.41
    THF 969.67
    2-butanone 736.76
    n-pentanol 122.71
    sec-butanol 172.44
    n-hexane 38.6
    ethylene glycol 52.32
    NMP 3190.13
    cyclohexane 172.37
    DMSO 1933.8
    n-butyl acetate 503.52
    n-octanol 127.41
    chloroform 4347.86
    n-propyl acetate 615.66
    acetic acid 952.08
    dichloromethane 5232.06
    cyclohexanone 1423.87
    propylene glycol 72.6
    isopropyl acetate 509.72
    DMAc 2810.52
    2-ethoxyethanol 379.85
    isopentanol 123.18
    n-heptane 43.9
    ethyl formate 579.41
    1,2-dichloroethane 2602.33
    n-hexanol 106.55
    2-methoxyethanol 447.13
    isobutyl acetate 316.54
    tetrachloromethane 669.8
    n-pentyl acetate 593.19
    transcutol 954.45
    n-heptanol 112.82
    ethylbenzene 181.23
    MIBK 280.79
    2-propoxyethanol 275.15
    tert-butanol 163.63
    MTBE 303.26
    2-butoxyethanol 307.84
    propionic acid 627.49
    o-xylene 323.04
    formic acid 412.91
    diethyl ether 290.67
    m-xylene 208.52
    p-xylene 289.97
    chlorobenzene 765.14
    dimethyl carbonate 580.7
    n-octane 25.93
    formamide 945.95
    cyclopentanone 1703.49
    2-pentanone 510.41
    anisole 382.96
    cyclopentyl methyl ether 657.23
    gamma-butyrolactone 2501.07
    1-methoxy-2-propanol 330.66
    pyridine 1029.41
    3-pentanone 677.44
    furfural 2031.06
    n-dodecane 16.42
    diethylene glycol 181.99
    diisopropyl ether 125.11
    tert-amyl alcohol 250.11
    acetylacetone 900.84
    n-hexadecane 19.13
    acetophenone 693.12
    methyl propionate 857.73
    isopentyl acetate 404.12
    trichloroethylene 5151.77
    n-nonanol 121.1
    cyclohexanol 317.72
    benzyl alcohol 279.29
    2-ethylhexanol 111.96
    isooctanol 103.1
    dipropyl ether 209.15
    1,2-dichlorobenzene 1033.47
    ethyl lactate 312.93
    propylene carbonate 1362.02
    n-methylformamide 906.59
    2-pentanol 120.23
    n-pentane 38.83
    1-propoxy-2-propanol 246.05
    1-methoxy-2-propyl acetate 486.59
    2-(2-methoxypropoxy) propanol 287.52
    mesitylene 142.17
    ε-caprolactone 1462.79
    p-cymene 142.02
    epichlorohydrin 2093.04
    1,1,1-trichloroethane 2062.83
    2-aminoethanol 122.52
    morpholine-4-carbaldehyde 1635.37
    sulfolane 3500.6
    2,2,4-trimethylpentane 40.63
    2-methyltetrahydrofuran 823.13
    n-hexyl acetate 524.87
    isooctane 14.17
    2-(2-butoxyethoxy)ethanol 327.77
    sec-butyl acetate 400.78
    tert-butyl acetate 494.98
    decalin 64.53
    glycerin 149.01
    diglyme 933.16
    acrylic acid 717.0
    isopropyl myristate 158.3
    n-butyric acid 682.8
    acetyl acetate 953.67
    di(2-ethylhexyl) phthalate 177.09
    ethyl propionate 583.73
    nitromethane 2856.89
    1,2-diethoxyethane 427.77
    benzonitrile 536.96
    trioctyl phosphate 131.21
    1-bromopropane 797.69
    gamma-valerolactone 2093.25
    n-decanol 79.26
    triethyl phosphate 349.34
    4-methyl-2-pentanol 74.49
    propionitrile 424.51
    vinylene carbonate 1468.52
    1,1,2-trichlorotrifluoroethane 1810.8
    DMS 694.85
    cumene 125.89
    2-octanol 104.14
    2-hexanone 384.69
    octyl acetate 220.03
    limonene 231.26
    1,2-dimethoxyethane 732.02
    ethyl orthosilicate 298.54
    tributyl phosphate 196.49
    diacetone alcohol 363.8
    N,N-dimethylaniline 322.4
    acrylonitrile 656.02
    aniline 362.42
    1,3-propanediol 149.11
    bromobenzene 1012.45
    dibromomethane 2769.44
    1,1,2,2-tetrachloroethane 3945.47
    2-methyl-cyclohexyl acetate 372.43
    tetrabutyl urea 279.78
    diisobutyl methanol 78.51
    2-phenylethanol 194.14
    styrene 256.42
    dioctyl adipate 296.88
    dimethyl sulfate 1348.33
    ethyl butyrate 474.14
    methyl lactate 396.61
    butyl lactate 434.35
    diethyl carbonate 415.86
    propanediol butyl ether 236.76
    triethyl orthoformate 376.32
    p-tert-butyltoluene 127.55
    methyl 4-tert-butylbenzoate 515.94
    morpholine 727.24
    tert-butylamine 112.46
    n-dodecanol 58.05
    dimethoxymethane 614.75
    ethylene carbonate 1152.46
    cyrene 429.96
    2-ethoxyethyl acetate 738.55
    2-ethylhexyl acetate 389.45
    1,2,4-trichlorobenzene 1304.47
    4-methylpyridine 939.87
    dibutyl ether 208.33
    2,6-dimethyl-4-heptanol 78.51
    DEF 1109.86
    dimethyl isosorbide 640.35
    tetrachloroethylene 2436.77
    eugenol 383.26
    triacetin 830.82
    span 80 262.93
    1,4-butanediol 94.01
    1,1-dichloroethane 1668.3
    2-methyl-1-pentanol 137.67
    methyl formate 677.72
    2-methyl-1-butanol 157.23
    n-decane 32.7
    butyronitrile 321.63
    3,7-dimethyl-1-octanol 126.11
    1-chlorooctane 165.44
    1-chlorotetradecane 52.93
    n-nonane 32.45
    undecane 21.59
    tert-butylcyclohexane 39.62
    cyclooctane 60.61
    cyclopentanol 392.78
    tetrahydropyran 594.97
    tert-amyl methyl ether 341.46
    2,5,8-trioxanonane 524.07
    1-hexene 107.83
    2-isopropoxyethanol 264.42
    2,2,2-trifluoroethanol 812.57
    methyl butyrate 784.71

    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