1-Methylcyclopropene

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  • Identifiers

    CAS number
    3100-04-7

    Molecular formula
    C4H6

    SMILES
    CC1=CC1

    Safety labels

  • Odor profile

    Fragrance
    Citrus 62.96%
    Woody 58.59%
    Herbal 51.97%
    Lemon 51.26%
    Spicy 48.77%
    Terpenic 48.52%
    Fresh 36.56%
    Earthy 33.07%
    Mint 31.15%
    Pine 30.79%

     

    Flavor
    Woody 50.26%
    Wood 34.67%
    Spicy 31.46%
    Herbal 30.9%
    Spice 30.17%
    Citrus 25.8%
    Camphor 25.75%
    Mint 25.26%
    Earthy 22.93%
    Sweet 22.55%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    1.0

    pKa est.
    8.41 (weak base)

    Molecular weight
    54.09 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Boiling point est.
    23°C

    Flash point

    • -56.52 ˚C est.

  • Synonyms

    • 1-Methylcyclopropene
    • 3100-04-7
    • SmartFresh
    • EthylBloc
    • 1-MCP
    • Cyclopropene, 1-methyl-
    • J6UJO23JGU
    • INVINSA
    • DTXSID2035643
    • CHEBI:132592
    • MCP cpd
    • RefChem:76382
    • DTXCID0015643
    • 1-methylcycloprop-1-ene
    • 1-methylecyclopropene
    • UNII-J6UJO23JGU
    • SCHEMBL8758
    • SCHEMBL75096
    • SCHEMBL246873
    • SCHEMBL895220
    • orb2646283
    • SCHEMBL2791127
    • SCHEMBL2911393
    • HSDB 7517
    • 1-METHYLCYCLOPROPENE [MI]
    • AKOS015917408
    • EPA Pesticide Chemical Code 224459
    • 29663-07-8
    • DB-000435
    • HY-148295
    • CS-0618384
    • NS00005370
    • H55360
    • 100M047
    • Q161651
    • InChI=1/C4H6/c1-4-2-3-4/h2H,3H2,1H
    • 3100-04-7

  • Applications

    1-Methylcyclopropene (CAS 3100-04-7) is widely used as a post-harvest ripening inhibitor to extend the shelf life of climacteric fruits and certain vegetables by blocking ethylene perception. It is applied in controlled-atmosphere storage and packaging systems to slow ripening and preserve quality during transport and storage. It also serves as a research tool to study ethylene signaling in plants, acting as an ethylene-action inhibitor in physiological experiments. In commercial horticulture and supply chains, it helps reduce losses by delaying ripening and senescence in stored fruit and produce.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 283.11
    methanol 205.68
    isopropanol 245.82
    water 1.01
    ethyl acetate 207.1
    n-propanol 248.22
    acetone 201.3
    n-butanol 254.6
    acetonitrile 156.59
    DMF 167.86
    toluene 112.74
    isobutanol 182.85
    1,4-dioxane 358.18
    methyl acetate 172.5
    THF 445.63
    2-butanone 213.45
    n-pentanol 202.19
    sec-butanol 263.47
    n-hexane 153.53
    ethylene glycol 104.93
    NMP 178.54
    cyclohexane 146.04
    DMSO 150.03
    n-butyl acetate 239.49
    n-octanol 177.18
    chloroform 289.11
    n-propyl acetate 128.19
    acetic acid 204.64
    dichloromethane 188.75
    cyclohexanone 199.47
    propylene glycol 188.64
    isopropyl acetate 138.26
    DMAc 205.39
    2-ethoxyethanol 229.21
    isopentanol 192.92
    n-heptane 224.17
    ethyl formate 80.94
    1,2-dichloroethane 129.47
    n-hexanol 410.63
    2-methoxyethanol 289.19
    isobutyl acetate 95.41
    tetrachloromethane 90.36
    n-pentyl acetate 109.96
    transcutol 665.62
    n-heptanol 164.8
    ethylbenzene 72.67
    MIBK 134.44
    2-propoxyethanol 459.55
    tert-butanol 300.67
    MTBE 279.72
    2-butoxyethanol 231.45
    propionic acid 180.76
    o-xylene 83.75
    formic acid 58.1
    diethyl ether 320.82
    m-xylene 87.49
    p-xylene 77.08
    chlorobenzene 98.53
    dimethyl carbonate 59.5
    n-octane 59.81
    formamide 63.1
    cyclopentanone 214.95
    2-pentanone 197.83
    anisole 144.57
    cyclopentyl methyl ether 262.45
    gamma-butyrolactone 175.31
    1-methoxy-2-propanol 278.05
    pyridine 197.26
    3-pentanone 170.35
    furfural 143.91
    n-dodecane 45.1
    diethylene glycol 270.96
    diisopropyl ether 138.51
    tert-amyl alcohol 286.31
    acetylacetone 150.39
    n-hexadecane 47.26
    acetophenone 107.08
    methyl propionate 152.64
    isopentyl acetate 194.03
    trichloroethylene 199.84
    n-nonanol 162.33
    cyclohexanol 209.42
    benzyl alcohol 107.73
    2-ethylhexanol 266.01
    isooctanol 120.49
    dipropyl ether 360.44
    1,2-dichlorobenzene 80.71
    ethyl lactate 83.61
    propylene carbonate 116.02
    n-methylformamide 88.58
    2-pentanol 229.49
    n-pentane 144.02
    1-propoxy-2-propanol 430.81
    1-methoxy-2-propyl acetate 243.77
    2-(2-methoxypropoxy) propanol 237.17
    mesitylene 61.77
    ε-caprolactone 181.35
    p-cymene 90.42
    epichlorohydrin 205.92
    1,1,1-trichloroethane 173.36
    2-aminoethanol 180.64
    morpholine-4-carbaldehyde 222.55
    sulfolane 164.53
    2,2,4-trimethylpentane 62.54
    2-methyltetrahydrofuran 360.71
    n-hexyl acetate 191.38
    isooctane 55.52
    2-(2-butoxyethoxy)ethanol 318.15
    sec-butyl acetate 108.09
    tert-butyl acetate 157.85
    decalin 65.58
    glycerin 183.24
    diglyme 417.44
    acrylic acid 144.62
    isopropyl myristate 100.54
    n-butyric acid 200.15
    acetyl acetate 119.61
    di(2-ethylhexyl) phthalate 79.6
    ethyl propionate 126.81
    nitromethane 157.75
    1,2-diethoxyethane 287.66
    benzonitrile 97.29
    trioctyl phosphate 63.99
    1-bromopropane 163.57
    gamma-valerolactone 230.65
    n-decanol 130.31
    triethyl phosphate 81.09
    4-methyl-2-pentanol 134.51
    propionitrile 155.68
    vinylene carbonate 85.72
    1,1,2-trichlorotrifluoroethane 202.04
    DMS 115.18
    cumene 59.07
    2-octanol 106.45
    2-hexanone 159.23
    octyl acetate 126.39
    limonene 157.17
    1,2-dimethoxyethane 267.92
    ethyl orthosilicate 87.6
    tributyl phosphate 75.17
    diacetone alcohol 191.32
    N,N-dimethylaniline 105.01
    acrylonitrile 123.56
    aniline 138.14
    1,3-propanediol 181.16
    bromobenzene 94.89
    dibromomethane 176.61
    1,1,2,2-tetrachloroethane 198.71
    2-methyl-cyclohexyl acetate 145.43
    tetrabutyl urea 95.76
    diisobutyl methanol 149.38
    2-phenylethanol 168.37
    styrene 88.53
    dioctyl adipate 110.42
    dimethyl sulfate 63.2
    ethyl butyrate 178.91
    methyl lactate 103.12
    butyl lactate 111.4
    diethyl carbonate 108.93
    propanediol butyl ether 213.93
    triethyl orthoformate 145.24
    p-tert-butyltoluene 92.71
    methyl 4-tert-butylbenzoate 126.82
    morpholine 399.37
    tert-butylamine 247.4
    n-dodecanol 110.49
    dimethoxymethane 156.26
    ethylene carbonate 83.68
    cyrene 132.59
    2-ethoxyethyl acetate 142.96
    2-ethylhexyl acetate 168.87
    1,2,4-trichlorobenzene 108.34
    4-methylpyridine 158.42
    dibutyl ether 201.53
    2,6-dimethyl-4-heptanol 149.38
    DEF 180.01
    dimethyl isosorbide 252.25
    tetrachloroethylene 136.5
    eugenol 122.66
    triacetin 159.13
    span 80 229.32
    1,4-butanediol 105.17
    1,1-dichloroethane 171.76
    2-methyl-1-pentanol 166.82
    methyl formate 59.39
    2-methyl-1-butanol 198.18
    n-decane 68.42
    butyronitrile 164.99
    3,7-dimethyl-1-octanol 188.12
    1-chlorooctane 120.82
    1-chlorotetradecane 64.22
    n-nonane 73.62
    undecane 53.11
    tert-butylcyclohexane 65.97
    cyclooctane 76.65
    cyclopentanol 207.89
    tetrahydropyran 371.8
    tert-amyl methyl ether 237.61
    2,5,8-trioxanonane 310.45
    1-hexene 209.65
    2-isopropoxyethanol 210.3
    2,2,2-trifluoroethanol 67.55
    methyl butyrate 127.45

    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