Octanoic Acid

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  • Identifiers

    CAS number
    124-07-2

    Molecular formula
    C8H16O2

    SMILES
    CCCCCCCC(=O)O

    Safety labels

    Corrosive
    Corrosive

    Retention indicies (RI)

    • DB5: 1185.8
    • Carbowax: 2053.57

  • Odor profile

    Fragrance
    Fatty 89.81%
    Cheesy 82.65%
    Waxy 74.78%
    Dairy 67.42%
    Sour 62.58%
    Sweaty 53.21%
    Oily 51.72%
    Creamy 50.24%
    Milky 49.63%
    Fruity 49.47%

     

    Flavor
    Fatty 71.87%
    Cheese 65.16%
    Waxy 59.74%
    Rancid 52.24%
    Sweat 49.57%
    Sour 46.67%
    Oily 44.55%
    Green 41.02%
    Fat 40.32%
    Cheesy 39.54%

     

    Odor impact est.
    Medium

    Odor threshold

    • Odor Threshold Low: 0.008 [mmHg]. [CAMEO] Recognition odor threshold from CHEMINFO
    • IT CAN BE DETECTED @ 0.008 PPM.
    • Aroma threshold values: Detection: 910 ppb to 19 ppm.

  • Properties

    XLogP3-AA
    3.0

    pKa est.
    8.12 (weak base)

    Molecular weight
    144.21 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Very slow

    Melting point expt.

    • 61 to 62 °F (NTP, 1992)
    • 16.3 °C
    • 16.5 °C

    Boiling point

    • 463.5 °F at 760 mmHg (NTP, 1992)
    • 239 °C

    Flash point

    • 106.19 ˚C est.
    • 230 °F (NTP, 1992)
    • 270 °F
    • 130 °C (open cup)
    • 270 °F.

    Solubility expt.

    • less than 1 mg/mL at 64 °F (NTP, 1992)
    • 789 mg/L (at 30 °C)
    • Very slightly sol in water (0.068 g/100 g at 20 °C); freely sol in alcohol, chloroform, ether, carbon disulfide, petroleum ether, glacial acetic acid
    • Miscible in ethanol, chloroform, acetonitrile
    • In water 789 mg/L at 30 °C
    • 0.789 mg/mL
    • slightly soluble in water; soluble in most organic solvents

  • Synonyms

    • octanoic acid
    • caprylic acid
    • 124-07-2
    • n-octanoic acid
    • Octylic acid
    • n-caprylic acid
    • octoic acid
    • n-octylic acid
    • n-Octoic acid
    • 1-heptanecarboxylic acid
    • Enantic acid
    • Octic acid
    • C-8 acid
    • Caprylsaeure
    • Acido octanoico
    • Acide octanoique
    • Kaprylsaeure
    • Hexacid 898
    • FEMA No. 2799
    • Acidum octanocium
    • Kyselina kaprylova
    • Octansaeure
    • 1-octanoic acid
    • C8:0
    • Caprylic acid (natural)
    • NSC 5024
    • NSC-5024
    • Kortacid-0899
    • OCTANOIC ACID (CAPRYLIC ACID)
    • Emery 657
    • CCRIS 4689
    • HSDB 821
    • Prifac 2901
    • Prifac-2901
    • CHEBI:28837
    • Lunac 8-95
    • acidum octanoicum
    • Acidum octanocium [Latin]
    • EDENOR C 8-98-100
    • EINECS 204-677-5
    • UNII-OBL58JN025
    • MFCD00004429
    • octylate
    • Acid C8
    • BRN 1747180
    • OBL58JN025
    • Kortacid 0899
    • DTXSID3021645
    • n-octic acid
    • AI3-04162
    • Lunac 8-98
    • Caprylic acid-8-13C
    • Octanoic acid-7-13C
    • CH3-[CH2]6-COOH
    • DTXCID501645
    • NSC5024
    • EC 204-677-5
    • 4-02-00-00982 (Beilstein Handbook Reference)
    • Caprylic acid (NF)
    • 287111-08-4
    • NCGC00090957-01
    • Octanoic acid (USAN)
    • 287111-23-3
    • 0ctanoic acid
    • Acidum octanocium (Latin)
    • CAPRYLIC ACID [NF]
    • OCTANOIC ACID (II)
    • OCTANOIC ACID [II]
    • OCTANOIC ACID [USAN]
    • CH3-(CH2)6-COOH
    • OCTANOIC ACID (MART.)
    • OCTANOIC ACID [MART.]
    • CAPRYLIC ACID (USP-RS)
    • CAPRYLIC ACID [USP-RS]
    • CAPRYLIC ACID (EP IMPURITY)
    • CAPRYLIC ACID [EP IMPURITY]
    • CAPRYLIC ACID (EP MONOGRAPH)
    • CAPRYLIC ACID [EP MONOGRAPH]
    • Acide octanoique [French]
    • Acido octanoico [Spanish]
    • Kyselina kaprylova [Czech]
    • Octanoic acid [USAN:INN]
    • CAS-124-07-2
    • caprylsaure
    • caprylic-acid
    • n-octanoicacid
    • octanic acid
    • Copper as octanoate
    • fatty acid 8:0
    • n-heptanecarboxylic acid
    • Octanoic acid, ?99%
    • Octanoic acid (Standard)
    • Heptane-1-carboxylic acid
    • Octanoic acid, >=98%
    • Octanoic acid, >=99%
    • bmse000502
    • CAPRYLIC ACID [MI]
    • SCHEMBL3933
    • WLN: QV7
    • NCIOpen2_002902
    • NCIOpen2_009358
    • Octanoic acid (USAN/INN)
    • OCTANOIC ACID [INN]
    • OCTANOIC ACID [FHFI]
    • OCTANOIC ACID [HSDB]
    • MLS002415762
    • Octanoic acid, >=96.0%
    • caprylic acid (octanoic acid)
    • CAPRYLIC ACID [VANDF]
    • IS_D15-OCTANOIC ACID
    • CHEMBL324846
    • GTPL4585
    • NAA 82
    • Octanoic acid, >=98%, FG
    • QSPL 011
    • QSPL 184
    • OCTANOIC ACID [WHO-DD]
    • HMS2270A23
    • Octanoic acid, analytical standard
    • STR10050
    • Tox21_111045
    • Tox21_201279
    • Tox21_300345
    • BDBM50485608
    • FA 8:0
    • HY-41417R
    • LMFA01010008
    • s6296

  • Applications

    Octanoic Acid (CAS 124-07-2) is commonly used as an intermediate to synthesize caprylate esters that serve as fragrance ingredients and emollients in cosmetics and personal care products; it also functions as a fatty‑acid component in detergents and household cleaners, supporting surfactant performance. It is a precursor to caprylate esters employed as lightweight plasticizers and resin modifiers in polymers, coatings, and inks. In industrial manufacturing it can act as a solvent or processing aid for polymer syntheses and other specialty chemicals. Additionally, it is used for flavor and fragrance applications where caprylate esters contribute to aroma and taste profiles.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 3156.22
    methanol 4157.64
    isopropanol 2164.77
    water 0.75
    ethyl acetate 1066.33
    n-propanol 1929.46
    acetone 2902.45
    n-butanol 1684.89
    acetonitrile 539.08
    DMF 2838.29
    toluene 179.8
    isobutanol 1472.4
    1,4-dioxane 1109.93
    methyl acetate 596.92
    THF 3209.07
    2-butanone 1226.9
    n-pentanol 1191.67
    sec-butanol 1322.22
    n-hexane 356.67
    ethylene glycol 595.8
    NMP 1979.53
    cyclohexane 119.96
    DMSO 4519.72
    n-butyl acetate 1128.85
    n-octanol 458.59
    chloroform 578.8
    n-propyl acetate 863.34
    acetic acid 1586.45
    dichloromethane 528.25
    cyclohexanone 1840.88
    propylene glycol 918.59
    isopropyl acetate 830.19
    DMAc 1109.65
    2-ethoxyethanol 1254.84
    isopentanol 1498.46
    n-heptane 96.02
    ethyl formate 542.9
    1,2-dichloroethane 636.78
    n-hexanol 1362.49
    2-methoxyethanol 2378.77
    isobutyl acetate 539.76
    tetrachloromethane 138.79
    n-pentyl acetate 543.67
    transcutol 3651.04
    n-heptanol 489.2
    ethylbenzene 159.83
    MIBK 906.93
    2-propoxyethanol 1706.06
    tert-butanol 2722.65
    MTBE 1236.91
    2-butoxyethanol 850.99
    propionic acid 1135.52
    o-xylene 158.89
    formic acid 538.18
    diethyl ether 800.7
    m-xylene 228.01
    p-xylene 209.51
    chlorobenzene 273.97
    dimethyl carbonate 213.86
    n-octane 34.98
    formamide 736.29
    cyclopentanone 2594.79
    2-pentanone 1472.58
    anisole 389.6
    cyclopentyl methyl ether 1547.9
    gamma-butyrolactone 2263.35
    1-methoxy-2-propanol 2042.11
    pyridine 675.54
    3-pentanone 647.08
    furfural 1143.89
    n-dodecane 21.19
    diethylene glycol 1066.43
    diisopropyl ether 360.22
    tert-amyl alcohol 1651.95
    acetylacetone 1303.65
    n-hexadecane 24.14
    acetophenone 381.74
    methyl propionate 753.44
    isopentyl acetate 997.94
    trichloroethylene 958.88
    n-nonanol 377.12
    cyclohexanol 1200.39
    benzyl alcohol 421.31
    2-ethylhexanol 689.15
    isooctanol 419.61
    dipropyl ether 644.48
    1,2-dichlorobenzene 276.69
    ethyl lactate 329.26
    propylene carbonate 907.22
    n-methylformamide 1439.2
    2-pentanol 1121.63
    n-pentane 118.84
    1-propoxy-2-propanol 1380.21
    1-methoxy-2-propyl acetate 918.1
    2-(2-methoxypropoxy) propanol 638.03
    mesitylene 171.93
    ε-caprolactone 1308.88
    p-cymene 122.28
    epichlorohydrin 1633.39
    1,1,1-trichloroethane 532.33
    2-aminoethanol 1421.75
    morpholine-4-carbaldehyde 1403.51
    sulfolane 3010.53
    2,2,4-trimethylpentane 70.1
    2-methyltetrahydrofuran 2196.71
    n-hexyl acetate 798.5
    isooctane 74.45
    2-(2-butoxyethoxy)ethanol 1093.85
    sec-butyl acetate 537.15
    tert-butyl acetate 1035.95
    decalin 88.86
    glycerin 974.08
    diglyme 1541.56
    acrylic acid 767.98
    isopropyl myristate 241.88
    n-butyric acid 1864.26
    acetyl acetate 417.92
    di(2-ethylhexyl) phthalate 232.32
    ethyl propionate 609.24
    nitromethane 1661.1
    1,2-diethoxyethane 910.39
    benzonitrile 421.16
    trioctyl phosphate 206.55
    1-bromopropane 403.73
    gamma-valerolactone 2211.83
    n-decanol 272.89
    triethyl phosphate 195.13
    4-methyl-2-pentanol 647.63
    propionitrile 602.02
    vinylene carbonate 605.71
    1,1,2-trichlorotrifluoroethane 1140.24
    DMS 367.68
    cumene 145.9
    2-octanol 346.07
    2-hexanone 1096.04
    octyl acetate 318.71
    limonene 246.89
    1,2-dimethoxyethane 1674.52
    ethyl orthosilicate 212.63
    tributyl phosphate 267.23
    diacetone alcohol 1408.76
    N,N-dimethylaniline 296.39
    acrylonitrile 651.18
    aniline 443.76
    1,3-propanediol 1597.62
    bromobenzene 248.49
    dibromomethane 422.93
    1,1,2,2-tetrachloroethane 961.51
    2-methyl-cyclohexyl acetate 433.2
    tetrabutyl urea 333.32
    diisobutyl methanol 359.46
    2-phenylethanol 489.82
    styrene 189.82
    dioctyl adipate 362.36
    dimethyl sulfate 430.08
    ethyl butyrate 569.23
    methyl lactate 479.93
    butyl lactate 524.64
    diethyl carbonate 273.24
    propanediol butyl ether 990.41
    triethyl orthoformate 361.85
    p-tert-butyltoluene 138.57
    methyl 4-tert-butylbenzoate 405.18
    morpholine 1853.74
    tert-butylamine 1543.73
    n-dodecanol 196.06
    dimethoxymethane 1146.83
    ethylene carbonate 553.54
    cyrene 488.85
    2-ethoxyethyl acetate 621.08
    2-ethylhexyl acetate 685.12
    1,2,4-trichlorobenzene 330.63
    4-methylpyridine 749.97
    dibutyl ether 519.42
    2,6-dimethyl-4-heptanol 359.46
    DEF 1253.47
    dimethyl isosorbide 958.28
    tetrachloroethylene 680.52
    eugenol 434.95
    triacetin 510.09
    span 80 666.3
    1,4-butanediol 655.75
    1,1-dichloroethane 585.82
    2-methyl-1-pentanol 1011.4
    methyl formate 638.82
    2-methyl-1-butanol 1227.58
    n-decane 40.44
    butyronitrile 868.63
    3,7-dimethyl-1-octanol 493.9
    1-chlorooctane 203.39
    1-chlorotetradecane 66.51
    n-nonane 43.98
    undecane 28.28
    tert-butylcyclohexane 117.1
    cyclooctane 44.71
    cyclopentanol 1732.41
    tetrahydropyran 1569.37
    tert-amyl methyl ether 813.45
    2,5,8-trioxanonane 963.08
    1-hexene 852.73
    2-isopropoxyethanol 958.68
    2,2,2-trifluoroethanol 327.12
    methyl butyrate 900.78

    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

Botanical

Name CAS Botanical Proportion
Blackcurrant bud 1 68606-81-5 Ribes nigrum L., fam. Grossulariaceae 0.01%
Genet absolute 1 8023-80-1 Spartium junceum L., fam. Leguminosae (Papilionaceae) 0.8%
Apple flower Malus arnoldiana (Rehd) Sarg. var. Redgold, fam. Rosaceae 0.13%
Tamarind 1 dried fruit Tamarindus indica L., fam. Leguminosae 0.13%
Hedychium coronarium flower (Japan) Hedychium coronarium Koenig, fam. Zingiberaceae 0.04%
Guava fruit (Nigeria) 91770-12-6 Psidium guajava L., fam. Myrtaceae 1.1%
Osmanthus concentrate 1 (Sukhumi-Abkhasia) 68917-05-5 Osmanthus fragrans (Thunb.) Lour., fam. Oleaceae 0.1%
Osmanthus concentrate 2 (Sukhumi-Abkhasia) 68917-05-5 Osmanthus fragrans (Thunb.) Lour., fam. Oleaceae 0.11%
Coriander fruit (Finland) 4 8008-52-4 Coriandrum sativum L., fam. Apiaceae (Umbelliferae) 0.25%
Rhus coriaria Rhus coriaria L., fam. Anarcadiaceae 0.1%
Orange, sweet (USA) (hydrocarbon-free) 8028-48-6 Citrus sinensis (L.) Osbeck, fam. Rutaceae 0.12%
Viburnum orientale leaf Viburnum orientale Pallas, fam. Caprifoliaceae 0.08%
Rhubarb root Rheum palmatum L., fam. Polygonaceae 0.1%
Scleria striatinux rhizome (Cameroon) Scleria striatinux De Wild., fam. Cyperaceae 4.0%
Zizyphus jujuba fruit (Malaysia) Zizyphus jujuba Mill. var. inermis, fam. Rhamnaceae 2.99%
Boronia megastigma 91771-36-7 Boronia megastigma Nees., fam. Rutaceae 0.07%
Sudachi peel (Japan) Citrus sudachi Hort. ex Shirai, fam. Rutaceae 0.01%
Sideritis condensata Sideritis condensata Boiss. et Heldr., fam. Lamiaceae (Labiatae) 0.3%
Jasmine rose absolute (India) Gardenia jasminoides Ellis, fam. Rubiaceae 0.67%
Tamarind 3 fruit Tamarindus indica L., fam. Leguminosae 0.1%
Phalaenopsis schilleriana headspace Phalaenopsis schilleriana Rehb. f., fam. Orchidaceae 0.01%
Pelargonium sidoides Pelargonium sidoides DC., fam. Geraniaceae 0.3%
Pelargonium reniforme Pelargonium reniforme Curt., fam. Geraniaceae 0.5%
Spearmint, scotch (Japan) Mentha gracilis Sole, fam. Lamiaceae (Labiatae) 4.42%
Datura flower headspace (Japan) Datura candida (Pers.), fam. Solanaceae 0.75%
Premna serratifolia flower bud Premna serratifolia L. (P.obtusifolia Br.R., P.taitensis Sch.),Verbenaceae 0.01%
Mullilam seed (India) Zanthoxylum rhetsa D.C. syn. Z. limonella (Dennst.) Alston, fam. Rutaceae 0.01%
Genipap fruit (Brazil) Genipa americana L., fam. Rubiaceae 34.1%
Cassia, bark (China) 4a 8007-80-5 Cinnamomum cassia Blume, fam. Lauraceae 0.01%
Cassia, leaf (China) 4b 8007-80-5 Cinnamomum cassia Blume, fam. Lauraceae 0.01%
Carob bean powder 2a raw 9000-40-2 Ceratonia siliqua L., fam. Leguminoseae 0.7%
Carob bean powder 2b roasted 9000-40-2 Ceratonia siliqua L., fam. Leguminoseae 0.7%
Grapefruit (Japan) 2 8016-20-4 Citrus paradisi Macfayden, fam. Rutaceae 0.02%
Sweetie peel Citrus paradisi Macfayden x Citrus maxima Merill, fam. Rutaceae 0.01%
Pineapple pulp Ananas comosus (L.) Merr., fam. Bromeliaceae 0.29%
Inula verbascifolia ssp. parnassica Inula verbascifolia Hausskn., ssp. parnassia Tutin, fam. Asteraceae 0.01%
Myrtle leaf (Turkey) 2 8008-46-6 Myrtus communis L., fam. Myrtaceae 0.05%
Anthoxanthum odoratum (Italy) 1b hay Anthoxanthum odoratum L., fam. Poaceae (Gramineae) 0.9%
Catharanthus roseus leaf Catharanthus roseus (L.) G. Don, fam. Apocynaceae 0.3%
Catharanthus roseus marcs Catharanthus roseus (L.) G. Don, fam. Apocynaceae 0.1%
Leea guineensis (Cameroon) 1a wood Leea guineensis G. Don, fam. Leeaceae 1.9%
Cassie absolute 1a extract 8023-82-3 Acacia farnesiana (L.) Willd., fam. Mimosaceae (Leguminosae) 0.5%
Rocket leaf 2 headspace Eruca sativa L., fam. Brassicaceae 0.9%
Soursop, wild fruit Annona montana Macf., fam. Annonaceae 6.3%
Cnidium officinale (Korea) Cnidium officinale Makino, fam. Apiaceae (Umbelliferae) 0.01%
Croton jimenezii (Costa Rica) Croton jimenezii Standl. et Valerio, fam. Euphorbiaceae 0.1%
Tordylium apulum fruit (Turkey) Tordylium apulum L., fam. Apiaceae (Umbelliferae) 0.4%