5-Methyl-1,2,3,4-tetrahydronaphthalene

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  • Identifiers

    CAS number
    2809-64-5

    Molecular formula
    C11H14

    SMILES
    CC1=C2CCCCC2=CC=C1

    Safety labels

  • Odor profile

    Fragrance
    Woody 62.87%
    Animal 39.22%
    Dry 38.56%
    Earthy 38.44%
    Sweet 38.07%
    Spicy 32.23%
    Floral 32.02%
    Musk 31.9%
    Amber 31.62%
    Camphoreous 30.93%

     

    Flavor
    Plastic 28.27%
    Animal 25.6%
    Dry 24.78%
    Sweet 24.42%
    Earthy 22.8%
    Tar 20.94%
    Tarry 20.73%
    Camphor 20.67%
    Indole 20.63%
    Naphthyl 20.45%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    3.7

    pKa est.
    8.06 (weak base)

    Molecular weight
    146.23 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Moderate

    Boiling point est.
    229°C

    Flash point

    • 83.8 ˚C est.

  • Synonyms

    • 2809-64-5
    • 5-Methyl-1,2,3,4-tetrahydronaphthalene
    • Naphthalene, 1,2,3,4-tetrahydro-5-methyl-
    • 5-METHYLTETRALIN
    • UNII-888WK5BNU1
    • 888WK5BNU1
    • 1,2,3,4-Tetrahydro-5-methyl-naphthalene
    • DTXSID50182365
    • 1,2,3,4-tetrahydro-5-methylnaphthalene
    • RefChem:103083
    • DTXCID60104856
    • InChI=1/C11H14/c1-9-5-4-7-10-6-2-3-8-11(9)10/h4-5,7H,2-3,6,8H2,1H
    • YXOVIGZJPGLNGM-UHFFFAOYSA-N
    • 5-METHYLTETRALINE
    • MFCD00216193
    • 1-Methyl-5,6,7,8-tetrahydronaphthalene
    • SCHEMBL598625
    • orb3021406
    • SCHEMBL1345352
    • SCHEMBL1346122
    • SCHEMBL5489112
    • SCHEMBL11626925
    • SCHEMBL11626927
    • SCHEMBL17288468
    • SCHEMBL17288964
    • SCHEMBL22554856
    • SCHEMBL30717272
    • AKOS006273345
    • AS-56833
    • CS-0197111
    • N10858
    • Q27269900
    • 2809-64-5

  • Applications

    5-Methyl-1,2,3,4-tetrahydronaphthalene (CAS 2809-64-5) is commonly used as a non-polar solvent and processing aid across industrial manufacturing, including coatings, inks, adhesives, and polymer processing. It also serves as a hydrogen-donor solvent in hydrocarbon upgrading and coal-liquefaction-type processing, facilitating hydrogenation and stabilization steps. In fragrance chemistry, tetralin derivatives like 5-Methyl-1,2,3,4-tetrahydronaphthalene may be used as fragrance intermediates or odorants for perfumery and flavor formulations. Additionally, it is employed as an organic synthesis intermediate for research in pharmaceutical and agrochemical fields, with usage and handling subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 274.85
    methanol 282.73
    isopropanol 198.63
    water 0.15
    ethyl acetate 987.86
    n-propanol 291.57
    acetone 868.42
    n-butanol 300.42
    acetonitrile 837.81
    DMF 782.32
    toluene 1015.47
    isobutanol 217.1
    1,4-dioxane 2478.54
    methyl acetate 825.11
    THF 2187.55
    2-butanone 775.68
    n-pentanol 242.86
    sec-butanol 196.61
    n-hexane 394.6
    ethylene glycol 31.74
    NMP 913.57
    cyclohexane 504.69
    DMSO 711.55
    n-butyl acetate 1854.8
    n-octanol 247.07
    chloroform 2092.59
    n-propyl acetate 827.11
    acetic acid 188.85
    dichloromethane 2542.86
    cyclohexanone 1543.61
    propylene glycol 37.13
    isopropyl acetate 632.47
    DMAc 495.91
    2-ethoxyethanol 313.4
    isopentanol 286.03
    n-heptane 362.97
    ethyl formate 532.02
    1,2-dichloroethane 1974.93
    n-hexanol 565.59
    2-methoxyethanol 395.72
    isobutyl acetate 568.13
    tetrachloromethane 615.44
    n-pentyl acetate 606.84
    transcutol 1457.47
    n-heptanol 249.88
    ethylbenzene 474.05
    MIBK 544.62
    2-propoxyethanol 740.3
    tert-butanol 299.34
    MTBE 711.31
    2-butoxyethanol 355.45
    propionic acid 236.14
    o-xylene 456.84
    formic acid 38.53
    diethyl ether 1406.22
    m-xylene 574.86
    p-xylene 525.93
    chlorobenzene 1135.03
    dimethyl carbonate 344.05
    n-octane 145.47
    formamide 84.97
    cyclopentanone 1541.33
    2-pentanone 785.08
    anisole 743.25
    cyclopentyl methyl ether 1305.28
    gamma-butyrolactone 1470.02
    1-methoxy-2-propanol 334.71
    pyridine 1504.91
    3-pentanone 763.05
    furfural 972.23
    n-dodecane 96.02
    diethylene glycol 295.25
    diisopropyl ether 487.34
    tert-amyl alcohol 235.49
    acetylacetone 851.76
    n-hexadecane 114.85
    acetophenone 524.89
    methyl propionate 674.14
    isopentyl acetate 1102.34
    trichloroethylene 2371.08
    n-nonanol 232.85
    cyclohexanol 398.63
    benzyl alcohol 299.01
    2-ethylhexanol 496.21
    isooctanol 233.11
    dipropyl ether 1239.3
    1,2-dichlorobenzene 911.75
    ethyl lactate 182.04
    propylene carbonate 807.94
    n-methylformamide 328.94
    2-pentanol 227.61
    n-pentane 246.26
    1-propoxy-2-propanol 584.83
    1-methoxy-2-propyl acetate 816.92
    2-(2-methoxypropoxy) propanol 357.4
    mesitylene 408.37
    ε-caprolactone 1212.58
    p-cymene 350.01
    epichlorohydrin 1878.38
    1,1,1-trichloroethane 1657.46
    2-aminoethanol 67.01
    morpholine-4-carbaldehyde 1098.5
    sulfolane 1374.46
    2,2,4-trimethylpentane 103.17
    2-methyltetrahydrofuran 1571.74
    n-hexyl acetate 703.14
    isooctane 116.1
    2-(2-butoxyethoxy)ethanol 500.15
    sec-butyl acetate 491.58
    tert-butyl acetate 730.69
    decalin 234.99
    glycerin 60.98
    diglyme 1103.25
    acrylic acid 178.83
    isopropyl myristate 359.23
    n-butyric acid 448.96
    acetyl acetate 583.49
    di(2-ethylhexyl) phthalate 212.12
    ethyl propionate 678.66
    nitromethane 610.82
    1,2-diethoxyethane 1429.08
    benzonitrile 668.88
    trioctyl phosphate 176.93
    1-bromopropane 1276.64
    gamma-valerolactone 1505.91
    n-decanol 195.22
    triethyl phosphate 321.58
    4-methyl-2-pentanol 177.02
    propionitrile 786.84
    vinylene carbonate 781.36
    1,1,2-trichlorotrifluoroethane 498.77
    DMS 579.36
    cumene 299.55
    2-octanol 190.95
    2-hexanone 752.84
    octyl acetate 391.65
    limonene 556.06
    1,2-dimethoxyethane 1157.42
    ethyl orthosilicate 332.19
    tributyl phosphate 256.01
    diacetone alcohol 417.65
    N,N-dimethylaniline 432.75
    acrylonitrile 788.15
    aniline 542.17
    1,3-propanediol 138.95
    bromobenzene 1476.83
    dibromomethane 1807.02
    1,1,2,2-tetrachloroethane 1640.86
    2-methyl-cyclohexyl acetate 551.09
    tetrabutyl urea 331.49
    diisobutyl methanol 305.59
    2-phenylethanol 464.61
    styrene 619.01
    dioctyl adipate 372.98
    dimethyl sulfate 436.27
    ethyl butyrate 1060.59
    methyl lactate 165.47
    butyl lactate 254.16
    diethyl carbonate 545.02
    propanediol butyl ether 208.58
    triethyl orthoformate 583.41
    p-tert-butyltoluene 331.53
    methyl 4-tert-butylbenzoate 419.01
    morpholine 1672.99
    tert-butylamine 254.07
    n-dodecanol 169.44
    dimethoxymethane 918.74
    ethylene carbonate 767.21
    cyrene 299.22
    2-ethoxyethyl acetate 708.76
    2-ethylhexyl acetate 1048.29
    1,2,4-trichlorobenzene 893.31
    4-methylpyridine 1370.33
    dibutyl ether 871.33
    2,6-dimethyl-4-heptanol 305.59
    DEF 866.09
    dimethyl isosorbide 763.11
    tetrachloroethylene 1208.4
    eugenol 343.05
    triacetin 443.43
    span 80 301.23
    1,4-butanediol 64.47
    1,1-dichloroethane 1559.78
    2-methyl-1-pentanol 235.68
    methyl formate 356.51
    2-methyl-1-butanol 250.14
    n-decane 153.14
    butyronitrile 748.75
    3,7-dimethyl-1-octanol 275.21
    1-chlorooctane 434.65
    1-chlorotetradecane 191.87
    n-nonane 170.34
    undecane 118.89
    tert-butylcyclohexane 214.45
    cyclooctane 248.91
    cyclopentanol 372.86
    tetrahydropyran 2000.79
    tert-amyl methyl ether 490.94
    2,5,8-trioxanonane 689.88
    1-hexene 756.92
    2-isopropoxyethanol 286.14
    2,2,2-trifluoroethanol 79.24
    methyl butyrate 858.35

    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