2-Methylnonanoic acid

Overview IFRA Request a quote

  • Identifiers

    CAS number
    24323-21-5

    Molecular formula
    C10H20O2

    SMILES
    CCCCCCCC(C)C(=O)O

    Safety labels

    Corrosive
    Corrosive

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Fatty 82.7%
    Waxy 70.61%
    Cheesy 62.53%
    Dairy 55.99%
    Oily 53.41%
    Creamy 46.85%
    Milky 46.72%
    Sour 42.47%
    Citrus 41.95%
    Green 40.91%

     

    Flavor
    Waxy 59.54%
    Fatty 56.99%
    Green 45.54%
    Oily 45.22%
    Cheese 43.1%
    Fruity 34.32%
    Fat 34.15%
    Creamy 31.46%
    Soapy 28.59%
    Musty 27.51%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    4.0

    pKa est.
    8.2 (weak base)

    Molecular weight
    172.26 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    260°C

    Flash point

    • 118.84 ˚C est.

  • Synonyms

    • 2-Methylnonanoic acid
    • 24323-21-5
    • 2-Methylnonan-1-oic acid
    • Nonanoic acid, 2-methyl-
    • EINECS 246-162-8
    • DTXSID80884901
    • RefChem:476109
    • DTXCID701024321
    • 246-162-8
    • 2-methyl nonaoic acid
    • 2-methyl-nonanoic acid
    • SCHEMBL277985
    • SCHEMBL277986
    • SCHEMBL7779699
    • SCHEMBL8148728
    • SCHEMBL21603084
    • CHEBI:179555
    • LMFA01020089
    • MFCD00154319
    • NS00050711
    • G85746
    • F556193
    • 24323-21-5

  • Applications

    2-Methylnonanoic acid (CAS 24323-21-5) is a branched long-chain carboxylic acid commonly used as an intermediate for the synthesis of branched esters and specialty lipids. In fragrance and cosmetics, it serves as a building block for ester derivatives that contribute to aroma character, texture, and longevity. In industrial manufacturing, it is used to produce lubricant basestocks and lubricant additives, helping to tailor viscosity and film-forming properties. It also functions as a precursor for plasticizers and polyester resins used in polymers, coatings, and inks, aiding flexibility and cure behavior. Additionally, it can be employed in the synthesis of surfactants and cleaning agents, and as a raw material for adhesive formulations where hydrophobic chains improve performance.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 4688.7
    methanol 5057.11
    isopropanol 4965.44
    water 0.17
    ethyl acetate 2555.4
    n-propanol 3529.08
    acetone 4191.56
    n-butanol 2865.39
    acetonitrile 1449.08
    DMF 3152.78
    toluene 433.36
    isobutanol 2809.66
    1,4-dioxane 2642.65
    methyl acetate 1524.21
    THF 4266.2
    2-butanone 2621.38
    n-pentanol 2356.53
    sec-butanol 3144.9
    n-hexane 875.02
    ethylene glycol 311.54
    NMP 1887.32
    cyclohexane 368.65
    DMSO 3649.56
    n-butyl acetate 2549.23
    n-octanol 711.76
    chloroform 1718.55
    n-propyl acetate 1990.65
    acetic acid 1363.91
    dichloromethane 1560.46
    cyclohexanone 2922.62
    propylene glycol 743.07
    isopropyl acetate 1952.08
    DMAc 1543.0
    2-ethoxyethanol 2065.88
    isopentanol 2853.27
    n-heptane 164.64
    ethyl formate 1125.25
    1,2-dichloroethane 1678.43
    n-hexanol 2269.49
    2-methoxyethanol 3186.79
    isobutyl acetate 1222.57
    tetrachloromethane 347.45
    n-pentyl acetate 1146.73
    transcutol 4999.55
    n-heptanol 853.58
    ethylbenzene 356.11
    MIBK 1673.7
    2-propoxyethanol 2686.42
    tert-butanol 5630.81
    MTBE 4241.17
    2-butoxyethanol 1362.39
    propionic acid 1357.4
    o-xylene 351.43
    formic acid 354.38
    diethyl ether 2909.62
    m-xylene 427.33
    p-xylene 459.33
    chlorobenzene 615.44
    dimethyl carbonate 267.96
    n-octane 74.5
    formamide 668.05
    cyclopentanone 3006.84
    2-pentanone 2701.3
    anisole 713.39
    cyclopentyl methyl ether 2326.57
    gamma-butyrolactone 2614.54
    1-methoxy-2-propanol 2903.25
    pyridine 1386.85
    3-pentanone 1292.3
    furfural 1453.03
    n-dodecane 41.52
    diethylene glycol 1243.81
    diisopropyl ether 1018.07
    tert-amyl alcohol 3700.2
    acetylacetone 1737.62
    n-hexadecane 48.41
    acetophenone 642.43
    methyl propionate 1385.28
    isopentyl acetate 2194.66
    trichloroethylene 2173.2
    n-nonanol 579.78
    cyclohexanol 1986.3
    benzyl alcohol 644.52
    2-ethylhexanol 1230.49
    isooctanol 757.12
    dipropyl ether 1415.39
    1,2-dichlorobenzene 598.21
    ethyl lactate 484.3
    propylene carbonate 1262.75
    n-methylformamide 1629.94
    2-pentanol 2406.55
    n-pentane 323.65
    1-propoxy-2-propanol 2199.79
    1-methoxy-2-propyl acetate 1682.75
    2-(2-methoxypropoxy) propanol 825.63
    mesitylene 315.8
    ε-caprolactone 2179.84
    p-cymene 239.42
    epichlorohydrin 2731.82
    1,1,1-trichloroethane 1325.55
    2-aminoethanol 1225.27
    morpholine-4-carbaldehyde 1838.42
    sulfolane 2764.36
    2,2,4-trimethylpentane 166.79
    2-methyltetrahydrofuran 3739.34
    n-hexyl acetate 1304.33
    isooctane 161.24
    2-(2-butoxyethoxy)ethanol 1431.59
    sec-butyl acetate 1393.97
    tert-butyl acetate 2043.1
    decalin 192.23
    glycerin 699.71
    diglyme 2268.07
    acrylic acid 726.25
    isopropyl myristate 397.21
    n-butyric acid 2807.95
    acetyl acetate 778.37
    di(2-ethylhexyl) phthalate 330.32
    ethyl propionate 1289.64
    nitromethane 1948.04
    1,2-diethoxyethane 2145.53
    benzonitrile 763.18
    trioctyl phosphate 290.73
    1-bromopropane 1278.76
    gamma-valerolactone 3082.0
    n-decanol 404.85
    triethyl phosphate 316.86
    4-methyl-2-pentanol 1289.54
    propionitrile 1485.57
    vinylene carbonate 895.56
    1,1,2-trichlorotrifluoroethane 1391.85
    DMS 567.73
    cumene 285.88
    2-octanol 645.15
    2-hexanone 2093.87
    octyl acetate 498.19
    limonene 467.19
    1,2-dimethoxyethane 3173.21
    ethyl orthosilicate 365.08
    tributyl phosphate 377.36
    diacetone alcohol 1930.13
    N,N-dimethylaniline 502.91
    acrylonitrile 1200.29
    aniline 770.73
    1,3-propanediol 1817.83
    bromobenzene 585.87
    dibromomethane 1278.07
    1,1,2,2-tetrachloroethane 2085.53
    2-methyl-cyclohexyl acetate 775.12
    tetrabutyl urea 434.73
    diisobutyl methanol 646.88
    2-phenylethanol 790.69
    styrene 433.22
    dioctyl adipate 517.37
    dimethyl sulfate 451.82
    ethyl butyrate 1246.14
    methyl lactate 529.51
    butyl lactate 778.03
    diethyl carbonate 543.98
    propanediol butyl ether 1193.9
    triethyl orthoformate 711.05
    p-tert-butyltoluene 253.63
    methyl 4-tert-butylbenzoate 596.5
    morpholine 3988.01
    tert-butylamine 3567.12
    n-dodecanol 289.82
    dimethoxymethane 1719.64
    ethylene carbonate 864.25
    cyrene 612.67
    2-ethoxyethyl acetate 1180.96
    2-ethylhexyl acetate 1523.19
    1,2,4-trichlorobenzene 642.04
    4-methylpyridine 1562.95
    dibutyl ether 1053.13
    2,6-dimethyl-4-heptanol 646.88
    DEF 2422.7
    dimethyl isosorbide 1237.28
    tetrachloroethylene 1394.51
    eugenol 615.56
    triacetin 708.88
    span 80 848.42
    1,4-butanediol 790.22
    1,1-dichloroethane 1889.91
    2-methyl-1-pentanol 1942.51
    methyl formate 758.63
    2-methyl-1-butanol 2311.87
    n-decane 86.99
    butyronitrile 2052.21
    3,7-dimethyl-1-octanol 821.91
    1-chlorooctane 425.27
    1-chlorotetradecane 123.62
    n-nonane 94.43
    undecane 58.47
    tert-butylcyclohexane 234.98
    cyclooctane 104.52
    cyclopentanol 2150.99
    tetrahydropyran 3882.67
    tert-amyl methyl ether 2192.05
    2,5,8-trioxanonane 1236.97
    1-hexene 2139.98
    2-isopropoxyethanol 1689.3
    2,2,2-trifluoroethanol 299.69
    methyl butyrate 1985.7

    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