cis-2-PENTENE

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  • Identifiers

    CAS number
    627-20-3

    Molecular formula
    C5H10

    SMILES
    CC/C=C\C

    Safety labels

    Flammable
    Flammable

    Acute Toxic
    Acute Toxic

    Irritant
    Irritant

    Health Hazard
    Health

  • Odor profile

    Fragrance
    Green 62.4%
    Fruity 55.29%
    Gassy 53.31%
    Fresh 42.52%
    Ethereal 41.25%
    Sweet 33.78%
    Pungent 30.96%
    Vegetable 29.14%
    Sharp 28.98%
    Apple 27.29%

     

    Flavor
    Green 36.41%
    Citrus 36.1%
    Gasoline 26.09%
    Pungent 24.84%
    Ethereal 23.69%
    Fruity 23.66%
    Sweet 21.94%
    Fresh 21.79%
    Rotten 21.47%
    Biscuit 20.89%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    2.1

    pKa est.
    9.39 (weak base)

    Molecular weight
    70.13 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Melting point expt.

    • -151.4 °C

    Boiling point

    • 36.9 °C

    Flash point

    • -41.15 ˚C est.
    • less than -4 °F (NFPA, 2010)
    • BELOW -4 °F (BELOW -20 °C) (CLOSED CUP)

    Solubility expt.

    • In water, 203 mg/l @ 25 °C
    • Soluble in benzene; miscible in ethanol and ethyl ether

  • Synonyms

    • cis-2-PENTENE
    • 627-20-3
    • (Z)-Pent-2-ene
    • 2-Pentene, (Z)-
    • cis-Pentene
    • cis-beta-N-Amylene
    • 2-Pentene, (2Z)-
    • beta-Amylene-cis
    • cis-beta-Amylene
    • cis-.beta.-Amylene
    • HSDB 5725
    • 54UR3XZ4FC
    • EINECS 210-988-7
    • 2-PENTENE, CIS-
    • CIS-2-PENTENE [HSDB]
    • 2-PENTENE (Z)-FORM [MI]
    • betaAmylenecis
    • cisbetaAmylene
    • cisPentene
    • cisbetaNAmylene
    • (Z)2Pentene
    • 2Pentene, (Z)
    • RefChem:577320
    • 2-PENTENE (Z)-FORM
    • (Z)-2-Pentene
    • (2Z)-2-Pentene
    • MFCD00063978
    • 2-PENTENE
    • 3-Pentene
    • sym-Methylethylethylene
    • (2Z)-pent-2-ene
    • .beta.-n-Amylene
    • cis-Pentene-2
    • UNII-54UR3XZ4FC
    • cis-2-Amylene
    • Pentene-2, cis-
    • 2-(Z)-C5H10
    • cis-2-Pentene, 98%
    • (2Z)-2-Pentene #
    • SCHEMBL60963
    • SCHEMBL118763
    • SCHEMBL120228
    • SCHEMBL120405
    • SCHEMBL14991021
    • SCHEMBL29064751
    • DTXSID10891269
    • NSC7894
    • NSC-7894
    • AKOS025295567
    • SY117156
    • NS00080706
    • NS00091371
    • P0065
    • D91891
    • Q15726033
    • 627-20-3

  • Applications

    cis-2-PENTENE (CAS 627-20-3) is used primarily as an industrial olefin feedstock and an intermediate in organic synthesis. In practice, it participates in hydroformylation and hydrogenation to furnish aldehydes, alcohols, and other value-added derivatives. It also serves as a building block or comonomer in polyolefin and specialty polymer production to tailor material properties. Additionally, cis-2-PENTENE can function as a reactive olefin in chemical processing streams to generate higher-carbon intermediates for the broader chemical industry, subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 2135.42
    methanol 1311.18
    isopropanol 1593.67
    water 0.14
    ethyl acetate 2364.26
    n-propanol 1841.78
    acetone 1772.93
    n-butanol 2388.32
    acetonitrile 1300.56
    DMF 764.93
    toluene 1186.11
    isobutanol 1209.73
    1,4-dioxane 2908.56
    methyl acetate 1233.69
    THF 5181.1
    2-butanone 1838.73
    n-pentanol 1489.04
    sec-butanol 1771.92
    n-hexane 3074.39
    ethylene glycol 112.34
    NMP 1014.89
    cyclohexane 2972.25
    DMSO 1235.22
    n-butyl acetate 5689.23
    n-octanol 895.97
    chloroform 3710.26
    n-propyl acetate 1334.74
    acetic acid 849.99
    dichloromethane 3379.98
    cyclohexanone 2447.07
    propylene glycol 198.38
    isopropyl acetate 1267.59
    DMAc 535.11
    2-ethoxyethanol 881.78
    isopentanol 1804.62
    n-heptane 4050.83
    ethyl formate 837.41
    1,2-dichloroethane 2217.05
    n-hexanol 4106.94
    2-methoxyethanol 1335.25
    isobutyl acetate 719.99
    tetrachloromethane 1310.9
    n-pentyl acetate 1260.07
    transcutol 3078.76
    n-heptanol 1020.13
    ethylbenzene 523.45
    MIBK 1011.7
    2-propoxyethanol 2769.6
    tert-butanol 1939.52
    MTBE 2592.21
    2-butoxyethanol 992.26
    propionic acid 880.24
    o-xylene 501.17
    formic acid 121.01
    diethyl ether 5132.63
    m-xylene 603.89
    p-xylene 543.02
    chlorobenzene 1159.22
    dimethyl carbonate 175.45
    n-octane 797.95
    formamide 158.19
    cyclopentanone 2119.1
    2-pentanone 2149.31
    anisole 673.37
    cyclopentyl methyl ether 2809.94
    gamma-butyrolactone 1606.42
    1-methoxy-2-propanol 1023.79
    pyridine 1958.52
    3-pentanone 1374.78
    furfural 1013.33
    n-dodecane 294.12
    diethylene glycol 819.83
    diisopropyl ether 1297.6
    tert-amyl alcohol 1671.94
    acetylacetone 1076.63
    n-hexadecane 324.88
    acetophenone 411.86
    methyl propionate 1002.97
    isopentyl acetate 3112.66
    trichloroethylene 2419.32
    n-nonanol 766.61
    cyclohexanol 1939.41
    benzyl alcohol 414.91
    2-ethylhexanol 3199.55
    isooctanol 749.34
    dipropyl ether 5250.17
    1,2-dichlorobenzene 743.51
    ethyl lactate 237.14
    propylene carbonate 922.06
    n-methylformamide 434.94
    2-pentanol 1914.99
    n-pentane 2564.39
    1-propoxy-2-propanol 2762.68
    1-methoxy-2-propyl acetate 1566.24
    2-(2-methoxypropoxy) propanol 583.34
    mesitylene 378.68
    ε-caprolactone 1935.27
    p-cymene 718.21
    epichlorohydrin 2079.75
    1,1,1-trichloroethane 2321.74
    2-aminoethanol 343.45
    morpholine-4-carbaldehyde 1019.86
    sulfolane 1311.6
    2,2,4-trimethylpentane 518.13
    2-methyltetrahydrofuran 4911.48
    n-hexyl acetate 1381.43
    isooctane 484.24
    2-(2-butoxyethoxy)ethanol 1013.96
    sec-butyl acetate 828.66
    tert-butyl acetate 1221.75
    decalin 596.07
    glycerin 201.87
    diglyme 1642.67
    acrylic acid 449.72
    isopropyl myristate 543.02
    n-butyric acid 1896.26
    acetyl acetate 811.21
    di(2-ethylhexyl) phthalate 291.92
    ethyl propionate 930.08
    nitromethane 878.06
    1,2-diethoxyethane 3402.44
    benzonitrile 737.31
    trioctyl phosphate 285.86
    1-bromopropane 4132.31
    gamma-valerolactone 1679.33
    n-decanol 595.38
    triethyl phosphate 453.11
    4-methyl-2-pentanol 828.31
    propionitrile 1458.3
    vinylene carbonate 642.76
    1,1,2-trichlorotrifluoroethane 787.56
    DMS 436.06
    cumene 294.87
    2-octanol 717.21
    2-hexanone 1570.17
    octyl acetate 678.43
    limonene 1756.01
    1,2-dimethoxyethane 1914.59
    ethyl orthosilicate 563.18
    tributyl phosphate 398.95
    diacetone alcohol 843.56
    N,N-dimethylaniline 364.6
    acrylonitrile 919.59
    aniline 930.7
    1,3-propanediol 684.87
    bromobenzene 1323.36
    dibromomethane 3519.58
    1,1,2,2-tetrachloroethane 1882.48
    2-methyl-cyclohexyl acetate 1078.42
    tetrabutyl urea 447.36
    diisobutyl methanol 1231.32
    2-phenylethanol 955.2
    styrene 678.7
    dioctyl adipate 505.1
    dimethyl sulfate 187.94
    ethyl butyrate 2663.17
    methyl lactate 207.79
    butyl lactate 520.98
    diethyl carbonate 1001.13
    propanediol butyl ether 506.79
    triethyl orthoformate 1467.98
    p-tert-butyltoluene 654.4
    methyl 4-tert-butylbenzoate 362.15
    morpholine 3209.4
    tert-butylamine 1826.11
    n-dodecanol 489.92
    dimethoxymethane 1004.1
    ethylene carbonate 672.86
    cyrene 299.11
    2-ethoxyethyl acetate 1056.77
    2-ethylhexyl acetate 2988.89
    1,2,4-trichlorobenzene 751.53
    4-methylpyridine 1758.08
    dibutyl ether 2809.62
    2,6-dimethyl-4-heptanol 1231.32
    DEF 1495.73
    dimethyl isosorbide 1020.1
    tetrachloroethylene 1431.39
    eugenol 356.85
    triacetin 509.88
    span 80 741.54
    1,4-butanediol 226.27
    1,1-dichloroethane 2613.97
    2-methyl-1-pentanol 1299.58
    methyl formate 288.51
    2-methyl-1-butanol 1658.56
    n-decane 594.82
    butyronitrile 2423.85
    3,7-dimethyl-1-octanol 1045.77
    1-chlorooctane 1087.86
    1-chlorotetradecane 396.21
    n-nonane 769.87
    undecane 390.69
    tert-butylcyclohexane 560.57
    cyclooctane 1053.26
    cyclopentanol 1516.03
    tetrahydropyran 5345.4
    tert-amyl methyl ether 1807.5
    2,5,8-trioxanonane 945.74
    1-hexene 4285.55
    2-isopropoxyethanol 671.39
    2,2,2-trifluoroethanol 130.64
    methyl butyrate 1259.46

    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