sec-Butyl methacrylate

Overview IFRA Request a quote

  • Identifiers

    CAS number
    2998-18-7

    Molecular formula
    C8H14O2

    SMILES
    CCC(C)OC(=O)C(=C)C

    Safety labels

    Flammable
    Flammable

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Fruity 72.09%
    Chamomile 49.28%
    Sweet 47.74%
    Herbal 47.69%
    Ethereal 41.67%
    Apple 40.76%
    Mint 37.72%
    Pungent 35.01%
    Floral 35.0%
    Rummy 32.31%

     

    Flavor
    Fruity 67.29%
    Sweet 45.36%
    Berry 40.06%
    Woody 39.12%
    Herbal 34.67%
    Tropical 32.43%
    Floral 31.64%
    Spicy 31.08%
    Green 28.66%
    Caramel 27.6%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    2.8

    pKa est.
    8.5 (weak base)

    Molecular weight
    142.2 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Boiling point est.
    145°C

    Flash point

    • 44.51 ˚C est.

  • Synonyms

    • sec-Butyl methacrylate
    • Methacrylic acid, sec-butyl ester
    • Isobutyl methacyrlate
    • UNII-37AD4SRT9M
    • 37AD4SRT9M
    • EINECS 221-073-7
    • NSC-32630
    • 2-Propenoic acid, 2-methyl-, 1-methylpropyl ester
    • DTXSID20863073
    • NSC 32630
    • 1-METHYLPROPYL 2-METHYLPROPENOATE
    • RefChem:182122
    • DTXCID50811749
    • SEC-BUTYL METHACRYLATE [INCI]
    • 221-073-7
    • VXTQKJXIZHSXBY-UHFFFAOYSA-N
    • 2998-18-7
    • butan-2-yl 2-methylprop-2-enoate
    • MFCD00048637
    • sec-butyl 2-methylprop-2-enoate
    • sec-butylmethacrylat
    • b-butyl methacrylate
    • b-n-butyl methacrylate
    • SCHEMBL33467
    • 29356-88-5
    • SCHEMBL864742
    • Sec-butyl 2-methylacrylate #
    • SCHEMBL4362365
    • SCHEMBL15751663
    • SCHEMBL21176710
    • SCHEMBL29055674
    • sec-Butyl methacrylate, AldrichCPR
    • NSC32630
    • MSK174744-1000M
    • SY465876
    • DB-266730
    • B5371
    • NS00048170
    • sec-Butyl Methacrylate (stabilized with MEHQ)
    • G86098
    • Q27256668
    • sec-Butyl methacrylate Solution in Methanol, 1000ug/mL
    • 2-Propenoic acid, 2-methyl-, 1-methylpropyl ester, homopolymer
    • 2998-18-7

  • Applications

    sec-Butyl methacrylate (CAS 2998-18-7) is used primarily as a monomer for acrylic polymers in coatings and inks, and as a component in adhesives and sealants to impart flexibility and improve mechanical properties; it also serves as a reactive diluent in UV-curable systems to tune cure behavior and processability. In polymer and plastics formulations, it helps tailor Tg and toughness, and is commonly employed in high-performance automotive and architectural coatings, industrial adhesives, and electronics/optical encapsulation materials.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 602.4
    methanol 587.64
    isopropanol 661.44
    water 2.52
    ethyl acetate 466.81
    n-propanol 595.85
    acetone 685.73
    n-butanol 610.87
    acetonitrile 533.38
    DMF 817.07
    toluene 396.59
    isobutanol 585.33
    1,4-dioxane 743.58
    methyl acetate 562.48
    THF 868.16
    2-butanone 770.35
    n-pentanol 623.16
    sec-butanol 885.28
    n-hexane 199.5
    ethylene glycol 114.77
    NMP 858.02
    cyclohexane 186.51
    DMSO 554.31
    n-butyl acetate 850.09
    n-octanol 551.07
    chloroform 1788.73
    n-propyl acetate 498.07
    acetic acid 459.4
    dichloromethane 1531.66
    cyclohexanone 934.04
    propylene glycol 235.53
    isopropyl acetate 347.67
    DMAc 895.57
    2-ethoxyethanol 531.13
    isopentanol 619.02
    n-heptane 131.5
    ethyl formate 454.58
    1,2-dichloroethane 795.49
    n-hexanol 754.32
    2-methoxyethanol 583.25
    isobutyl acetate 355.86
    tetrachloromethane 299.35
    n-pentyl acetate 524.96
    transcutol 1042.66
    n-heptanol 435.98
    ethylbenzene 407.42
    MIBK 391.08
    2-propoxyethanol 689.24
    tert-butanol 864.38
    MTBE 720.41
    2-butoxyethanol 485.57
    propionic acid 456.6
    o-xylene 385.95
    formic acid 128.07
    diethyl ether 447.62
    m-xylene 331.49
    p-xylene 570.8
    chlorobenzene 579.77
    dimethyl carbonate 151.77
    n-octane 86.64
    formamide 176.66
    cyclopentanone 862.47
    2-pentanone 530.5
    anisole 582.45
    cyclopentyl methyl ether 481.83
    gamma-butyrolactone 848.96
    1-methoxy-2-propanol 489.08
    pyridine 758.09
    3-pentanone 410.28
    furfural 932.62
    n-dodecane 91.49
    diethylene glycol 372.63
    diisopropyl ether 205.49
    tert-amyl alcohol 984.37
    acetylacetone 501.3
    n-hexadecane 98.88
    acetophenone 591.88
    methyl propionate 361.33
    isopentyl acetate 780.16
    trichloroethylene 1551.6
    n-nonanol 458.36
    cyclohexanol 625.11
    benzyl alcohol 516.41
    2-ethylhexanol 582.14
    isooctanol 379.75
    dipropyl ether 375.7
    1,2-dichlorobenzene 570.68
    ethyl lactate 254.86
    propylene carbonate 626.76
    n-methylformamide 367.36
    2-pentanol 529.62
    n-pentane 140.74
    1-propoxy-2-propanol 601.4
    1-methoxy-2-propyl acetate 467.6
    2-(2-methoxypropoxy) propanol 518.73
    mesitylene 243.51
    ε-caprolactone 823.15
    p-cymene 322.96
    epichlorohydrin 957.23
    1,1,1-trichloroethane 947.68
    2-aminoethanol 247.41
    morpholine-4-carbaldehyde 764.24
    sulfolane 890.33
    2,2,4-trimethylpentane 135.22
    2-methyltetrahydrofuran 917.5
    n-hexyl acetate 788.36
    isooctane 89.48
    2-(2-butoxyethoxy)ethanol 586.94
    sec-butyl acetate 364.52
    tert-butyl acetate 419.3
    decalin 157.48
    glycerin 219.16
    diglyme 899.28
    acrylic acid 372.28
    isopropyl myristate 327.61
    n-butyric acid 583.32
    acetyl acetate 306.88
    di(2-ethylhexyl) phthalate 304.39
    ethyl propionate 377.75
    nitromethane 685.43
    1,2-diethoxyethane 564.81
    benzonitrile 725.49
    trioctyl phosphate 246.09
    1-bromopropane 668.91
    gamma-valerolactone 954.74
    n-decanol 346.69
    triethyl phosphate 260.43
    4-methyl-2-pentanol 353.11
    propionitrile 515.53
    vinylene carbonate 613.86
    1,1,2-trichlorotrifluoroethane 635.05
    DMS 398.36
    cumene 333.39
    2-octanol 437.81
    2-hexanone 618.12
    octyl acetate 433.68
    limonene 442.43
    1,2-dimethoxyethane 914.73
    ethyl orthosilicate 251.42
    tributyl phosphate 286.07
    diacetone alcohol 460.56
    N,N-dimethylaniline 447.84
    acrylonitrile 597.22
    aniline 411.38
    1,3-propanediol 371.81
    bromobenzene 646.12
    dibromomethane 1085.84
    1,1,2,2-tetrachloroethane 1303.87
    2-methyl-cyclohexyl acetate 498.33
    tetrabutyl urea 355.24
    diisobutyl methanol 299.89
    2-phenylethanol 567.75
    styrene 449.21
    dioctyl adipate 420.37
    dimethyl sulfate 241.84
    ethyl butyrate 550.49
    methyl lactate 202.59
    butyl lactate 382.05
    diethyl carbonate 388.9
    propanediol butyl ether 491.07
    triethyl orthoformate 327.95
    p-tert-butyltoluene 297.16
    methyl 4-tert-butylbenzoate 479.89
    morpholine 791.63
    tert-butylamine 645.66
    n-dodecanol 282.98
    dimethoxymethane 391.35
    ethylene carbonate 458.41
    cyrene 403.75
    2-ethoxyethyl acetate 480.52
    2-ethylhexyl acetate 638.11
    1,2,4-trichlorobenzene 663.25
    4-methylpyridine 918.0
    dibutyl ether 501.16
    2,6-dimethyl-4-heptanol 299.89
    DEF 572.08
    dimethyl isosorbide 674.17
    tetrachloroethylene 760.74
    eugenol 488.08
    triacetin 503.78
    span 80 516.81
    1,4-butanediol 255.79
    1,1-dichloroethane 1014.72
    2-methyl-1-pentanol 692.47
    methyl formate 321.5
    2-methyl-1-butanol 662.04
    n-decane 130.06
    butyronitrile 634.62
    3,7-dimethyl-1-octanol 538.32
    1-chlorooctane 397.41
    1-chlorotetradecane 188.21
    n-nonane 130.49
    undecane 105.47
    tert-butylcyclohexane 169.87
    cyclooctane 75.32
    cyclopentanol 624.65
    tetrahydropyran 785.73
    tert-amyl methyl ether 606.2
    2,5,8-trioxanonane 659.58
    1-hexene 534.65
    2-isopropoxyethanol 458.81
    2,2,2-trifluoroethanol 157.24
    methyl butyrate 610.81

    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