5-Methylnonanal

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  • Identifiers

    CAS number
    52432-75-4

    Molecular formula
    C10H20O

    SMILES
    CCCCC(C)CCCC=O

  • Odor profile

    Citrus 81.41%
    Green 79.85%
    Waxy 70.91%
    Floral 69.55%
    Sweet 68.64%
    Aldehydic 68.38%
    Fresh 68.35%
    Fatty 65.93%
    Orange 60.99%
    Rose 54.88%

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  • Properties

    XLogP3-AA
    3.5

    Molecular weight
    156.26 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderately fast

    Boiling point est.
    204°C

    Flash point est.
    76.86 ˚C

  • Synonyms

    • 5-methylnonanal
    • SCHEMBL1410276
    • BQVGERTUJDGGDM-UHFFFAOYSA-N
    • DTXSID201317002
    • 52432-75-4

  • Applications

    5-Methylnonanal (CAS 52432-75-4) is a medium-chain, branched aliphatic aldehyde with a fresh aldehydic, slightly fatty citrus-green character, used as a fragrance ingredient to add lift and diffusion in fine fragrances, soaps, detergents, candles, and air-care products; in flavor work it is dosed at very low levels to reinforce citrus peel, apple-pear and waxy nuances in beverages, confectionery, and bakery; in synthesis its reactive carbonyl enables oxime/imine formation, reduction to 5-methylnonanol, or oxidation to the corresponding acid/esters that serve as precursors to surfactants, plasticizers, and lubricants; it is also employed as an analytical reference standard and odor marker in GC/GC-MS studies of volatile aldehydes in foods, fats/oils, cosmetics, and environmental samples, and in research on hydrophobic surface functionalization and polymer materials; typically stored airtight and protected from oxygen/light to minimize autoxidation.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 16224.45
    methanol 11347.0
    isopropanol 17533.8
    water 0.11
    ethyl acetate 13729.51
    n-propanol 14497.26
    acetone 22217.08
    n-butanol 13111.89
    acetonitrile 10567.97
    DMF 8422.6
    toluene 2752.87
    isobutanol 10716.47
    1,4-dioxane 10314.16
    methyl acetate 7886.99
    THF 19548.16
    2-butanone 15438.8
    n-pentanol 7207.41
    sec-butanol 11460.04
    n-hexane 3913.79
    ethylene glycol 783.07
    NMP 4438.41
    cyclohexane 3401.09
    DMSO 11398.81
    n-butyl acetate 10777.26
    n-octanol 1880.42
    chloroform 11917.34
    n-propyl acetate 7891.07
    acetic acid 4429.13
    dichloromethane 12983.88
    cyclohexanone 15134.92
    propylene glycol 2007.11
    isopropyl acetate 7895.07
    DMAc 3454.46
    2-ethoxyethanol 5597.76
    isopentanol 10769.31
    n-heptane 1461.29
    ethyl formate 5284.84
    1,2-dichloroethane 10845.64
    n-hexanol 8208.79
    2-methoxyethanol 9969.5
    isobutyl acetate 3872.51
    tetrachloromethane 2559.54
    n-pentyl acetate 3756.19
    transcutol 13903.36
    n-heptanol 2146.85
    ethylbenzene 1449.07
    MIBK 6445.19
    2-propoxyethanol 8675.15
    tert-butanol 16331.13
    MTBE 14241.98
    2-butoxyethanol 3390.05
    propionic acid 5526.35
    o-xylene 1330.99
    formic acid 662.28
    diethyl ether 17173.55
    m-xylene 1871.48
    p-xylene 1741.92
    chlorobenzene 3404.81
    dimethyl carbonate 964.28
    n-octane 391.13
    formamide 1294.12
    cyclopentanone 12987.95
    2-pentanone 15279.76
    anisole 2481.25
    cyclopentyl methyl ether 10659.27
    gamma-butyrolactone 10690.83
    1-methoxy-2-propanol 8875.35
    pyridine 7836.01
    3-pentanone 7130.83
    furfural 5202.71
    n-dodecane 163.81
    diethylene glycol 3224.5
    diisopropyl ether 4070.6
    tert-amyl alcohol 9475.88
    acetylacetone 7416.15
    n-hexadecane 196.97
    acetophenone 1870.94
    methyl propionate 7151.27
    isopentyl acetate 7701.12
    trichloroethylene 12992.09
    n-nonanol 1459.28
    cyclohexanol 9306.08
    benzyl alcohol 1953.31
    2-ethylhexanol 4462.91
    isooctanol 1733.42
    dipropyl ether 8138.51
    1,2-dichlorobenzene 2487.5
    ethyl lactate 1351.75
    propylene carbonate 4732.37
    n-methylformamide 4974.14
    2-pentanol 9393.05
    n-pentane 2545.66
    1-propoxy-2-propanol 8133.7
    1-methoxy-2-propyl acetate 5838.25
    2-(2-methoxypropoxy) propanol 1766.24
    mesitylene 1155.48
    ε-caprolactone 9303.32
    p-cymene 974.01
    epichlorohydrin 12170.07
    1,1,1-trichloroethane 9777.93
    2-aminoethanol 3029.98
    morpholine-4-carbaldehyde 4991.57
    sulfolane 8569.43
    2,2,4-trimethylpentane 642.45
    2-methyltetrahydrofuran 17995.93
    n-hexyl acetate 4290.57
    isooctane 652.85
    2-(2-butoxyethoxy)ethanol 3119.29
    sec-butyl acetate 4598.0
    tert-butyl acetate 6851.89
    decalin 836.35
    glycerin 1520.46
    diglyme 6169.51
    acrylic acid 2746.43
    isopropyl myristate 1142.99
    n-butyric acid 11946.08
    acetyl acetate 3484.08
    di(2-ethylhexyl) phthalate 670.91
    ethyl propionate 5739.95
    nitromethane 7321.66
    1,2-diethoxyethane 8562.05
    benzonitrile 3124.58
    trioctyl phosphate 635.83
    1-bromopropane 10465.11
    gamma-valerolactone 12335.37
    n-decanol 975.52
    triethyl phosphate 1013.3
    4-methyl-2-pentanol 3751.0
    propionitrile 9455.48
    vinylene carbonate 3375.48
    1,1,2-trichlorotrifluoroethane 4743.11
    DMS 1721.39
    cumene 867.1
    2-octanol 1539.88
    2-hexanone 8873.21
    octyl acetate 1341.06
    limonene 2257.37
    1,2-dimethoxyethane 11011.85
    ethyl orthosilicate 1139.35
    tributyl phosphate 925.22
    diacetone alcohol 5563.58
    N,N-dimethylaniline 1171.99
    acrylonitrile 7481.97
    aniline 3656.02
    1,3-propanediol 5143.0
    bromobenzene 3642.54
    dibromomethane 10757.7
    1,1,2,2-tetrachloroethane 9215.72
    2-methyl-cyclohexyl acetate 2383.3
    tetrabutyl urea 1025.91
    diisobutyl methanol 2205.69
    2-phenylethanol 2337.56
    styrene 2015.43
    dioctyl adipate 1376.44
    dimethyl sulfate 1265.24
    ethyl butyrate 5949.72
    methyl lactate 1598.37
    butyl lactate 2114.88
    diethyl carbonate 2237.71
    propanediol butyl ether 2199.74
    triethyl orthoformate 2714.3
    p-tert-butyltoluene 941.17
    methyl 4-tert-butylbenzoate 1290.15
    morpholine 15905.9
    tert-butylamine 11086.09
    n-dodecanol 707.41
    dimethoxymethane 6417.71
    ethylene carbonate 3722.34
    cyrene 1139.45
    2-ethoxyethyl acetate 3770.18
    2-ethylhexyl acetate 5420.68
    1,2,4-trichlorobenzene 2499.42
    4-methylpyridine 8210.5
    dibutyl ether 5132.91
    2,6-dimethyl-4-heptanol 2205.69
    DEF 9037.82
    dimethyl isosorbide 2868.59
    tetrachloroethylene 6389.63
    eugenol 1195.01
    triacetin 1954.56
    span 80 1821.08
    1,4-butanediol 1517.51
    1,1-dichloroethane 14124.52
    2-methyl-1-pentanol 5330.7
    methyl formate 2683.63
    2-methyl-1-butanol 8748.87
    n-decane 368.79
    butyronitrile 12510.66
    3,7-dimethyl-1-octanol 2123.71
    1-chlorooctane 1555.83
    1-chlorotetradecane 421.43
    n-nonane 446.98
    undecane 236.42
    tert-butylcyclohexane 865.5
    cyclooctane 816.82
    cyclopentanol 9070.08
    tetrahydropyran 21316.01
    tert-amyl methyl ether 6978.31
    2,5,8-trioxanonane 2802.49
    1-hexene 10665.96
    2-isopropoxyethanol 4040.11
    2,2,2-trifluoroethanol 829.19
    methyl butyrate 8626.08

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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

Botanical

Name CAS Botanical Proportion
Mentha x gentilis nm. hirtella Mentha x gentilis (L.) nm hirtella Markl., fam Lamiaceae (Labiatae) 0.6%