15-Methylhexadecanoic acid

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  • Identifiers

    CAS number
    1603-03-8

    Molecular formula
    C17H34O2

    SMILES
    CC(C)CCCCCCCCCCCCCC(=O)O

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Waxy 79.76%
    Fatty 70.75%
    Oily 37.65%
    Odorless 29.86%
    Creamy 26.55%
    Milky 23.68%
    Dairy 23.14%
    Woody 22.5%
    Meaty 22.12%
    Savory 21.72%

     

    Flavor
    Fatty 55.98%
    Waxy 46.49%
    Mild 37.43%
    Fat 35.71%
    Oily 32.84%
    Bland 31.88%
    Faint 31.62%
    Coconut 29.24%
    Odorless 29.08%
    Slightly waxy 26.23%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    6.6

    pKa est.
    7.45 (neutral)

    Molecular weight
    270.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    352°C

    Flash point

    • 178.66 ˚C est.

  • Synonyms

    • 15-Methylhexadecanoic acid
    • 1603-03-8
    • 15-Methylpalmitic acid
    • Isoheptadecanoic acid
    • isomargaric acid
    • 15-Methyl hexadecanoic acid
    • Subtiloheptadecanoic acid
    • Hexadecanoic acid, 15-methyl-
    • methylpalmitic acid
    • 15-methyl-hexadecanoic acid
    • iso-margaric acid
    • Z8I04ZY2JB
    • CHEBI:70850
    • DTXSID60166853
    • i-C17:0
    • i17:0
    • i-17:0
    • RefChem:437490
    • DTXCID1089344
    • 633-902-3
    • 15-methyl palmitic acid
    • iso-C17:0
    • UNII-Z8I04ZY2JB
    • C17:0 (iso)
    • SCHEMBL346565
    • orb1692404
    • SCHEMBL8598421
    • SCHEMBL8883594
    • HY-N7824
    • LMFA01020012
    • MFCD00083427
    • AKOS040756161
    • EBC-617035
    • BP-41936
    • PD078123
    • TS-08887
    • CS-0138196
    • E87692
    • 15-Methylpalmitic acid, >=98% (capillary GC)
    • Q27139144
    • 1603-03-8

  • Applications

    15-Methylhexadecanoic acid (CAS 1603-03-8) is a long-chain branched fatty acid commonly used as a versatile building block to prepare esters, amides, and other derivatives for lubricant formulations and lubricant additives; it can serve as a plasticizer precursor for polymers and coatings, improving flexibility and processability. It also functions as an intermediate in the synthesis of surfactants and detergents, helping to tailor surface activity. In cosmetics and personal care, it may be employed as an emollient or conditioning ingredient; in coatings and inks, it can act as a resin modifier or component of wax-like esters to adjust gloss and hardness. Additionally, it is used as a polymer synthesis modifier to tailor crystallinity and processing characteristics. Subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 164.64
    methanol 100.6
    isopropanol 214.88
    water 0.01
    ethyl acetate 248.72
    n-propanol 169.35
    acetone 166.46
    n-butanol 196.3
    acetonitrile 47.07
    DMF 275.43
    toluene 82.98
    isobutanol 174.73
    1,4-dioxane 258.0
    methyl acetate 128.19
    THF 1005.6
    2-butanone 261.07
    n-pentanol 173.5
    sec-butanol 199.28
    n-hexane 79.48
    ethylene glycol 5.16
    NMP 486.99
    cyclohexane 121.9
    DMSO 381.56
    n-butyl acetate 439.14
    n-octanol 129.78
    chloroform 385.55
    n-propyl acetate 367.2
    acetic acid 67.02
    dichloromethane 365.72
    cyclohexanone 634.13
    propylene glycol 31.8
    isopropyl acetate 310.43
    DMAc 407.41
    2-ethoxyethanol 241.02
    isopentanol 264.31
    n-heptane 56.49
    ethyl formate 95.83
    1,2-dichloroethane 339.52
    n-hexanol 193.89
    2-methoxyethanol 258.31
    isobutyl acetate 297.37
    tetrachloromethane 102.62
    n-pentyl acetate 412.91
    transcutol 1027.23
    n-heptanol 137.88
    ethylbenzene 87.36
    MIBK 357.49
    2-propoxyethanol 332.57
    tert-butanol 349.16
    MTBE 440.82
    2-butoxyethanol 301.22
    propionic acid 95.21
    o-xylene 86.35
    formic acid 10.67
    diethyl ether 254.89
    m-xylene 92.5
    p-xylene 121.34
    chlorobenzene 136.92
    dimethyl carbonate 38.37
    n-octane 22.91
    formamide 20.81
    cyclopentanone 625.17
    2-pentanone 332.02
    anisole 184.19
    cyclopentyl methyl ether 521.88
    gamma-butyrolactone 486.87
    1-methoxy-2-propanol 354.06
    pyridine 218.89
    3-pentanone 200.94
    furfural 315.77
    n-dodecane 11.99
    diethylene glycol 106.57
    diisopropyl ether 158.52
    tert-amyl alcohol 322.34
    acetylacetone 310.07
    n-hexadecane 14.7
    acetophenone 212.88
    methyl propionate 162.83
    isopentyl acetate 482.32
    trichloroethylene 478.36
    n-nonanol 130.32
    cyclohexanol 281.82
    benzyl alcohol 120.36
    2-ethylhexanol 191.07
    isooctanol 157.6
    dipropyl ether 352.02
    1,2-dichlorobenzene 172.93
    ethyl lactate 116.88
    propylene carbonate 288.27
    n-methylformamide 77.88
    2-pentanol 195.54
    n-pentane 40.15
    1-propoxy-2-propanol 390.76
    1-methoxy-2-propyl acetate 378.61
    2-(2-methoxypropoxy) propanol 254.59
    mesitylene 83.76
    ε-caprolactone 513.13
    p-cymene 86.69
    epichlorohydrin 570.71
    1,1,1-trichloroethane 356.74
    2-aminoethanol 38.3
    morpholine-4-carbaldehyde 391.43
    sulfolane 855.45
    2,2,4-trimethylpentane 38.29
    2-methyltetrahydrofuran 687.59
    n-hexyl acetate 402.65
    isooctane 31.63
    2-(2-butoxyethoxy)ethanol 363.92
    sec-butyl acetate 334.58
    tert-butyl acetate 480.67
    decalin 59.47
    glycerin 41.47
    diglyme 670.9
    acrylic acid 43.75
    isopropyl myristate 157.49
    n-butyric acid 291.79
    acetyl acetate 119.61
    di(2-ethylhexyl) phthalate 106.57
    ethyl propionate 269.18
    nitromethane 126.36
    1,2-diethoxyethane 465.36
    benzonitrile 128.96
    trioctyl phosphate 91.97
    1-bromopropane 269.39
    gamma-valerolactone 726.32
    n-decanol 89.02
    triethyl phosphate 149.9
    4-methyl-2-pentanol 165.1
    propionitrile 80.03
    vinylene carbonate 165.04
    1,1,2-trichlorotrifluoroethane 321.35
    DMS 152.25
    cumene 80.92
    2-octanol 125.02
    2-hexanone 365.45
    octyl acetate 175.01
    limonene 167.19
    1,2-dimethoxyethane 496.96
    ethyl orthosilicate 163.23
    tributyl phosphate 121.38
    diacetone alcohol 433.11
    N,N-dimethylaniline 149.53
    acrylonitrile 65.62
    aniline 99.15
    1,3-propanediol 100.25
    bromobenzene 158.87
    dibromomethane 283.2
    1,1,2,2-tetrachloroethane 549.21
    2-methyl-cyclohexyl acetate 330.91
    tetrabutyl urea 172.74
    diisobutyl methanol 145.53
    2-phenylethanol 146.5
    styrene 92.0
    dioctyl adipate 223.0
    dimethyl sulfate 105.91
    ethyl butyrate 363.62
    methyl lactate 80.03
    butyl lactate 256.11
    diethyl carbonate 158.93
    propanediol butyl ether 223.27
    triethyl orthoformate 288.72
    p-tert-butyltoluene 90.39
    methyl 4-tert-butylbenzoate 258.89
    morpholine 468.43
    tert-butylamine 253.85
    n-dodecanol 61.93
    dimethoxymethane 202.55
    ethylene carbonate 166.05
    cyrene 229.03
    2-ethoxyethyl acetate 359.39
    2-ethylhexyl acetate 385.51
    1,2,4-trichlorobenzene 209.59
    4-methylpyridine 250.65
    dibutyl ether 330.12
    2,6-dimethyl-4-heptanol 145.53
    DEF 349.5
    dimethyl isosorbide 517.81
    tetrachloroethylene 312.44
    eugenol 203.81
    triacetin 324.25
    span 80 253.85
    1,4-butanediol 39.09
    1,1-dichloroethane 300.7
    2-methyl-1-pentanol 197.94
    methyl formate 42.37
    2-methyl-1-butanol 207.6
    n-decane 29.85
    butyronitrile 153.9
    3,7-dimethyl-1-octanol 173.74
    1-chlorooctane 139.64
    1-chlorotetradecane 41.26
    n-nonane 30.74
    undecane 17.74
    tert-butylcyclohexane 57.01
    cyclooctane 35.69
    cyclopentanol 273.31
    tetrahydropyran 554.95
    tert-amyl methyl ether 336.62
    2,5,8-trioxanonane 389.42
    1-hexene 191.08
    2-isopropoxyethanol 244.89
    2,2,2-trifluoroethanol 24.63
    methyl butyrate 386.28

    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