Ethyl 2-methylpentanoate

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  • Identifiers

    CAS number
    39255-32-8

    Molecular formula
    C8H16O2

    SMILES
    CCCC(C)C(=O)OCC

    Safety labels

    Flammable
    Flammable

  • Odor profile

    Fruity 97.68%
    Apple 73.46%
    Green 64.26%
    Pineapple 61.28%
    Tropical 59.73%
    Sweet 54.8%
    Banana 49.8%
    Fatty 47.49%
    Pear 47.38%
    Waxy 45.93%

    Scent© AI

  • Properties

    XLogP3-AA
    2.4

    Molecular weight
    144.21 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Very fast

    Boiling point est.
    153°C

    Flash point est.
    45.17 ˚C

  • Synonyms

    • Ethyl 2-methylpentanoate
    • 39255-32-8
    • Ethyl 2-methylvalerate
    • Manzanate
    • Melon valerate
    • Pentanoic acid, 2-methyl-, ethyl ester
    • Ethyl alpha-methylvalerate
    • Ethyl .alpha.-methylvalerate
    • FEMA No. 3488
    • DTXSID7047198
    • EINECS 254-384-1
    • 405SN8638D
    • AI3-33618
    • DTXCID5027198
    • HZPKNSYIDSNZKW-UHFFFAOYSA-
    • EC 254-384-1
    • ETHYL 2-METHYLPENTANOATE [FCC]
    • ETHYL 2-METHYLPENTANOATE [FHFI]
    • (+/-)-ETHYL 2-METHYLPENTANOATE
    • ETHYL 2-METHYLPENTANOATE, (+/-)-
    • UNII-405SN8638D
    • 2-Methylvaleric Acid Ethyl Ester
    • MFCD00036564
    • ethyl-2-methyl-pentanoate
    • SCHEMBL113543
    • SCHEMBL6117226
    • CHEMBL3186172
    • FEMA 3488
    • CHEBI:179947
    • 2-Methylpentanoic Acid Ethyl Ester
    • Tox21_302712
    • LMFA07010860
    • AKOS009158369
    • CS-W016383
    • HY-W015667
    • Ethyl 2-methylpentanoate, >=98%, FG
    • ETHYL (+/-)-2-METHYLPENTANOATE
    • NCGC00256866-01
    • LS-13510
    • CAS-39255-32-8
    • E0801
    • NS00004474
    • E75820
    • Q6753428
    • Ethyl 2-methylpentanoate, analytical reference material
    • 254-384-1

  • Applications

    Ethyl 2-methylpentanoate (CAS 39255-32-8) is a branched-chain ester with a sweet fruity aroma reminiscent of pear and pineapple, making it widely employed as a flavouring agent in foods, beverages, chewing gum and chewable pharmaceuticals, as a top-note ingredient in perfumes, air fresheners, personal-care products and household cleaners; beyond its sensory role it serves as a medium-polarity solvent for resins and actives, a flavour carrier in microencapsulation, and an intermediate for synthesising higher esters, acids or alcohols in the fragrance industry, offering moderate volatility, low toxicity and compliance with EU Flavouring Regulation, FEMA/GRAS status and RIFM safety recommendations.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 6357.02
    methanol 8439.2
    isopropanol 5615.73
    water 7.78
    ethyl acetate 2778.57
    n-propanol 5137.29
    acetone 4095.19
    n-butanol 4562.21
    acetonitrile 5085.57
    DMF 3975.95
    toluene 1606.71
    isobutanol 4221.84
    1,4-dioxane 5125.16
    methyl acetate 2666.89
    THF 4580.83
    2-butanone 3285.48
    n-pentanol 3611.17
    sec-butanol 5122.89
    n-hexane 1259.96
    ethylene glycol 842.58
    NMP 3072.13
    cyclohexane 1497.31
    DMSO 3067.6
    n-butyl acetate 3339.46
    n-octanol 1996.69
    chloroform 11480.18
    n-propyl acetate 2138.83
    acetic acid 4869.92
    dichloromethane 9019.82
    cyclohexanone 4717.49
    propylene glycol 1270.25
    isopropyl acetate 1630.11
    DMAc 2662.79
    2-ethoxyethanol 2978.26
    isopentanol 3866.32
    n-heptane 584.08
    ethyl formate 2610.48
    1,2-dichloroethane 4664.29
    n-hexanol 3731.7
    2-methoxyethanol 4129.49
    isobutyl acetate 1380.78
    tetrachloromethane 2194.61
    n-pentyl acetate 1990.45
    transcutol 4944.99
    n-heptanol 1731.89
    ethylbenzene 1194.81
    MIBK 1571.86
    2-propoxyethanol 3624.28
    tert-butanol 5652.1
    MTBE 4203.35
    2-butoxyethanol 2173.18
    propionic acid 3128.48
    o-xylene 1049.91
    formic acid 1360.52
    diethyl ether 3542.15
    m-xylene 1044.4
    p-xylene 1678.53
    chlorobenzene 2974.1
    dimethyl carbonate 619.72
    n-octane 276.94
    formamide 1505.46
    cyclopentanone 3811.07
    2-pentanone 2545.75
    anisole 1852.37
    cyclopentyl methyl ether 2509.52
    gamma-butyrolactone 4125.28
    1-methoxy-2-propanol 2740.22
    pyridine 4627.32
    3-pentanone 1745.98
    furfural 3705.44
    n-dodecane 206.52
    diethylene glycol 1951.14
    diisopropyl ether 1003.31
    tert-amyl alcohol 5027.1
    acetylacetone 1876.59
    n-hexadecane 231.52
    acetophenone 1612.65
    methyl propionate 1689.06
    isopentyl acetate 2790.56
    trichloroethylene 8335.16
    n-nonanol 1513.96
    cyclohexanol 4109.37
    benzyl alcohol 1779.41
    2-ethylhexanol 2098.86
    isooctanol 1394.09
    dipropyl ether 1712.88
    1,2-dichlorobenzene 2281.0
    ethyl lactate 800.9
    propylene carbonate 2461.86
    n-methylformamide 2759.1
    2-pentanol 3217.1
    n-pentane 932.1
    1-propoxy-2-propanol 2576.2
    1-methoxy-2-propyl acetate 1558.67
    2-(2-methoxypropoxy) propanol 1258.69
    mesitylene 709.83
    ε-caprolactone 3805.47
    p-cymene 766.04
    epichlorohydrin 4683.17
    1,1,1-trichloroethane 4982.22
    2-aminoethanol 2030.26
    morpholine-4-carbaldehyde 3185.02
    sulfolane 3724.69
    2,2,4-trimethylpentane 456.02
    2-methyltetrahydrofuran 4685.49
    n-hexyl acetate 2710.43
    isooctane 327.78
    2-(2-butoxyethoxy)ethanol 1792.61
    sec-butyl acetate 1368.77
    tert-butyl acetate 1668.99
    decalin 559.06
    glycerin 1299.14
    diglyme 3292.29
    acrylic acid 2449.96
    isopropyl myristate 835.7
    n-butyric acid 4228.26
    acetyl acetate 1427.41
    di(2-ethylhexyl) phthalate 720.44
    ethyl propionate 1472.7
    nitromethane 4788.31
    1,2-diethoxyethane 2498.41
    benzonitrile 3191.18
    trioctyl phosphate 608.72
    1-bromopropane 3804.65
    gamma-valerolactone 4631.73
    n-decanol 996.22
    triethyl phosphate 665.49
    4-methyl-2-pentanol 1570.73
    propionitrile 4086.15
    vinylene carbonate 2460.3
    1,1,2-trichlorotrifluoroethane 3100.41
    DMS 1160.47
    cumene 806.28
    2-octanol 1450.29
    2-hexanone 2448.65
    octyl acetate 1118.19
    limonene 1209.54
    1,2-dimethoxyethane 4774.64
    ethyl orthosilicate 683.67
    tributyl phosphate 752.08
    diacetone alcohol 1665.39
    N,N-dimethylaniline 1206.44
    acrylonitrile 4061.17
    aniline 2048.18
    1,3-propanediol 2846.27
    bromobenzene 3208.34
    dibromomethane 6376.52
    1,1,2,2-tetrachloroethane 6840.3
    2-methyl-cyclohexyl acetate 1248.94
    tetrabutyl urea 878.44
    diisobutyl methanol 1006.74
    2-phenylethanol 1725.85
    styrene 1616.01
    dioctyl adipate 1039.13
    dimethyl sulfate 875.07
    ethyl butyrate 1680.8
    methyl lactate 821.45
    butyl lactate 1274.43
    diethyl carbonate 1104.49
    propanediol butyl ether 1877.58
    triethyl orthoformate 1070.48
    p-tert-butyltoluene 713.12
    methyl 4-tert-butylbenzoate 1239.73
    morpholine 5884.32
    tert-butylamine 4121.71
    n-dodecanol 718.35
    dimethoxymethane 1922.26
    ethylene carbonate 2147.88
    cyrene 980.45
    2-ethoxyethyl acetate 1705.34
    2-ethylhexyl acetate 2032.06
    1,2,4-trichlorobenzene 2329.02
    4-methylpyridine 4827.64
    dibutyl ether 1952.27
    2,6-dimethyl-4-heptanol 1006.74
    DEF 2883.31
    dimethyl isosorbide 1732.34
    tetrachloroethylene 4824.34
    eugenol 1291.05
    triacetin 1345.71
    span 80 1356.45
    1,4-butanediol 1514.64
    1,1-dichloroethane 6036.94
    2-methyl-1-pentanol 3150.63
    methyl formate 2019.16
    2-methyl-1-butanol 3875.08
    n-decane 381.17
    butyronitrile 5006.0
    3,7-dimethyl-1-octanol 1634.58
    1-chlorooctane 1309.69
    1-chlorotetradecane 452.16
    n-nonane 418.29
    undecane 263.69
    tert-butylcyclohexane 563.41
    cyclooctane 386.97
    cyclopentanol 3779.78
    tetrahydropyran 5752.84
    tert-amyl methyl ether 2538.76
    2,5,8-trioxanonane 1811.3
    1-hexene 3076.89
    2-isopropoxyethanol 2045.5
    2,2,2-trifluoroethanol 1054.92
    methyl butyrate 2543.22

    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