Adipic anhydride

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  • Identifiers

    CAS number
    2035-75-8

    Molecular formula
    C6H8O3

    SMILES
    C1CCC(=O)OC(=O)C1

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Coconut 50.08%
    Buttery 48.21%
    Fatty 47.3%
    Creamy 46.62%
    Nutty 45.96%
    Coumarinic 44.25%
    Caramellic 40.38%
    Oily 39.16%
    Lactonic 37.32%
    Sweet 36.43%

     

    Flavor
    Sweet 54.28%
    Fatty 43.31%
    Caramel 39.13%
    Buttery 38.09%
    Creamy 35.52%
    Coconut 35.11%
    Tonka 32.37%
    Oily 31.9%
    Coumarin 27.9%
    Tobacco 26.45%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    0.3

    pKa est.
    8.03 (weak base)

    Molecular weight
    128.13 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    299°C

    Melting point expt.

    • 22 °C

    Flash point

    • 109.31 ˚C est.

  • Synonyms

    • Oxepane-2,7-dione
    • 2,7-Oxepanedione
    • 2035-75-8
    • Adipic anhydride
    • Hexanedioic anhydride
    • Butanedicarboxylic anhydride
    • Hexanedioic acid anhydride
    • DTXSID401316648
    • RefChem:553088
    • DTXCID101746486
    • 218-001-1
    • EINECS 218-001-1
    • 2,7-oxepanedion
    • MFCD01593588
    • 3-propyloxetane-2,4-dione
    • Adipicanhydride
    • 29254-17-9
    • adipic acid anhydride
    • Cyclic adipic anhydride
    • U8CS8REU8L
    • 2,7-Oxepanedione, 9CI
    • Hexanedioic acid, anhydride
    • SCHEMBL320487
    • SCHEMBL6060264
    • CHEBI:173481
    • BBL100131
    • STK378020
    • AKOS006230209
    • CS-W019642
    • BP-14140
    • FA164878
    • MS-20708
    • SY033154
    • DB-008919
    • ST50863957
    • EN300-41706
    • F20518
    • F243245
    • 2035-75-8

  • Applications

    Adipic anhydride (CAS 2035-75-8) is an important intermediate and feedstock for introducing adipate units in polymer chemistries, notably supplying adipic acid-derived segments for nylon 6,6 and other polyamides. It is also a precursor for adipate ester plasticizers used to enhance flexibility in PVC, coatings, and adhesives. In the plastics field, adipic anhydride is used to synthesize polyester and polyurethane resins with adipate linkages, improving flexibility and durability. As a reactive intermediate, it is employed to form esters and amides in various industrial syntheses.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 123.37
    methanol 178.0
    isopropanol 87.13
    water 3.28
    ethyl acetate 162.66
    n-propanol 80.02
    acetone 440.01
    n-butanol 60.29
    acetonitrile 263.03
    DMF 1139.34
    toluene 35.14
    isobutanol 51.86
    1,4-dioxane 291.19
    methyl acetate 220.44
    THF 452.85
    2-butanone 212.85
    n-pentanol 49.95
    sec-butanol 68.21
    n-hexane 4.82
    ethylene glycol 64.88
    NMP 1113.41
    cyclohexane 5.53
    DMSO 1187.0
    n-butyl acetate 74.05
    n-octanol 37.03
    chloroform 338.86
    n-propyl acetate 86.91
    acetic acid 1184.57
    dichloromethane 340.33
    cyclohexanone 314.05
    propylene glycol 81.42
    isopropyl acetate 85.03
    DMAc 684.66
    2-ethoxyethanol 125.76
    isopentanol 48.85
    n-heptane 2.74
    ethyl formate 141.52
    1,2-dichloroethane 202.09
    n-hexanol 40.2
    2-methoxyethanol 270.83
    isobutyl acetate 42.11
    tetrachloromethane 11.02
    n-pentyl acetate 66.33
    transcutol 441.74
    n-heptanol 25.44
    ethylbenzene 24.66
    MIBK 70.06
    2-propoxyethanol 115.55
    tert-butanol 99.26
    MTBE 57.81
    2-butoxyethanol 70.72
    propionic acid 301.39
    o-xylene 30.69
    formic acid 314.44
    diethyl ether 64.88
    m-xylene 27.41
    p-xylene 37.3
    chlorobenzene 123.71
    dimethyl carbonate 112.15
    n-octane 1.83
    formamide 482.89
    cyclopentanone 524.71
    2-pentanone 137.8
    anisole 86.92
    cyclopentyl methyl ether 114.17
    gamma-butyrolactone 797.05
    1-methoxy-2-propanol 191.82
    pyridine 364.16
    3-pentanone 108.64
    furfural 633.32
    n-dodecane 2.74
    diethylene glycol 128.87
    diisopropyl ether 17.49
    tert-amyl alcohol 77.54
    acetylacetone 280.35
    n-hexadecane 3.1
    acetophenone 122.28
    methyl propionate 172.05
    isopentyl acetate 60.13
    trichloroethylene 509.33
    n-nonanol 33.72
    cyclohexanol 73.28
    benzyl alcohol 85.34
    2-ethylhexanol 26.41
    isooctanol 21.35
    dipropyl ether 28.21
    1,2-dichlorobenzene 116.57
    ethyl lactate 69.16
    propylene carbonate 332.03
    n-methylformamide 429.08
    2-pentanol 42.55
    n-pentane 3.24
    1-propoxy-2-propanol 77.02
    1-methoxy-2-propyl acetate 102.47
    2-(2-methoxypropoxy) propanol 114.47
    mesitylene 17.19
    ε-caprolactone 292.93
    p-cymene 16.35
    epichlorohydrin 460.31
    1,1,1-trichloroethane 104.82
    2-aminoethanol 97.44
    morpholine-4-carbaldehyde 618.12
    sulfolane 1039.5
    2,2,4-trimethylpentane 3.0
    2-methyltetrahydrofuran 238.02
    n-hexyl acetate 111.15
    isooctane 2.15
    2-(2-butoxyethoxy)ethanol 146.91
    sec-butyl acetate 50.69
    tert-butyl acetate 89.56
    decalin 5.96
    glycerin 159.77
    diglyme 229.4
    acrylic acid 416.02
    isopropyl myristate 37.4
    n-butyric acid 224.8
    acetyl acetate 160.1
    di(2-ethylhexyl) phthalate 51.43
    ethyl propionate 88.72
    nitromethane 1437.67
    1,2-diethoxyethane 79.12
    benzonitrile 148.54
    trioctyl phosphate 34.9
    1-bromopropane 63.84
    gamma-valerolactone 624.46
    n-decanol 25.79
    triethyl phosphate 42.23
    4-methyl-2-pentanol 25.62
    propionitrile 116.81
    vinylene carbonate 327.58
    1,1,2-trichlorotrifluoroethane 353.56
    DMS 137.13
    cumene 19.37
    2-octanol 21.2
    2-hexanone 87.85
    octyl acetate 55.51
    limonene 23.35
    1,2-dimethoxyethane 202.44
    ethyl orthosilicate 33.3
    tributyl phosphate 44.8
    diacetone alcohol 131.25
    N,N-dimethylaniline 65.33
    acrylonitrile 251.25
    aniline 91.19
    1,3-propanediol 129.17
    bromobenzene 104.53
    dibromomethane 176.66
    1,1,2,2-tetrachloroethane 314.22
    2-methyl-cyclohexyl acetate 55.4
    tetrabutyl urea 64.75
    diisobutyl methanol 17.92
    2-phenylethanol 65.99
    styrene 37.87
    dioctyl adipate 69.5
    dimethyl sulfate 281.84
    ethyl butyrate 58.63
    methyl lactate 143.88
    butyl lactate 68.68
    diethyl carbonate 50.37
    propanediol butyl ether 106.21
    triethyl orthoformate 41.97
    p-tert-butyltoluene 16.02
    methyl 4-tert-butylbenzoate 102.31
    morpholine 336.21
    tert-butylamine 40.25
    n-dodecanol 19.7
    dimethoxymethane 214.09
    ethylene carbonate 213.96
    cyrene 138.98
    2-ethoxyethyl acetate 107.94
    2-ethylhexyl acetate 47.52
    1,2,4-trichlorobenzene 155.08
    4-methylpyridine 268.75
    dibutyl ether 36.5
    2,6-dimethyl-4-heptanol 17.92
    DEF 228.9
    dimethyl isosorbide 189.57
    tetrachloroethylene 150.56
    eugenol 107.51
    triacetin 135.68
    span 80 102.07
    1,4-butanediol 51.12
    1,1-dichloroethane 147.19
    2-methyl-1-pentanol 44.11
    methyl formate 313.99
    2-methyl-1-butanol 47.74
    n-decane 3.76
    butyronitrile 90.88
    3,7-dimethyl-1-octanol 33.38
    1-chlorooctane 20.3
    1-chlorotetradecane 10.09
    n-nonane 3.2
    undecane 3.14
    tert-butylcyclohexane 4.9
    cyclooctane 1.72
    cyclopentanol 138.3
    tetrahydropyran 171.42
    tert-amyl methyl ether 51.66
    2,5,8-trioxanonane 192.97
    1-hexene 22.0
    2-isopropoxyethanol 74.69
    2,2,2-trifluoroethanol 243.44
    methyl butyrate 122.11

    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