Propylene

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  • Identifiers

    CAS number
    115-07-1

    Molecular formula
    C3H6

    SMILES
    CC=C

    Safety labels

    Flammable
    Flammable

    Compressed Gas
    Compressed Gas

  • Odor profile

    Fragrance
    Gassy 55.45%
    Pungent 48.87%
    Ethereal 48.56%
    Fruity 42.56%
    Sharp 34.19%
    Green 32.99%
    Fresh 29.82%
    Nutty 27.37%
    Alliaceous 22.14%
    Alcoholic 21.75%

     

    Flavor
    Pungent 42.49%
    Fruity 36.84%
    Ethereal 30.05%
    Green 28.61%
    Nutty 24.61%
    Rotten 22.9%
    Gasoline 22.43%
    Whiskey 21.15%
    Solvent 20.3%
    Decomposing cabbage 20.03%

     

    Odor impact est.
    Low

    Odor threshold

    • Odor Threshold Low: 23.0 [ppm]. Odor Threshold High: 68.0 [ppm]. Odor threshold, (recognition/detection) from CHEMINFO
    • ... between 39.6 and 116.27 mg/cu m.
    • Propylene has odor thresholds of 10-50 mg/cu m (detection) and about 100 mg/cu m (recognition), and an organoleptic limit of 0.5 mg/L.

  • Properties

    XLogP3-AA
    1.4

    pKa est.
    9.62 (weak base)

    Molecular weight
    42.08 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Melting point expt.

    • -301.4 °F (NTP, 1992)
    • -185.30 °C
    • -185 °C
    • -301.4 °F

    Boiling point

    • -53.9 °F at 760 mmHg (NTP, 1992)
    • -47.68 °C
    • -48 °C
    • -53.9 °F

    Flash point

    • -89.79 ˚C est.
    • -162 °F (NTP, 1992)
    • -108 °C
    • -162 °F (-108 °C)
    • Flammable gas
    • -162 °F

    Solubility expt.

    • 44.6 mL/100 mL (NTP, 1992)
    • In water, 200 mg/L at 25 °C
    • In water, 44.6 mL gas/100 mL at 20 °C
    • Very soluble in water
    • Very soluble in ethanol, acetic acid
    • For more Solubility (Complete) data for Propylene (7 total), please visit the HSDB record page.
    • Solubility in water: poor

  • Synonyms

    • PROPYLENE
    • Propene
    • prop-1-ene
    • 1-Propene
    • Methylethylene
    • Methylethene
    • 115-07-1
    • 1-Propylene
    • Propene, pure
    • NCI-C50077
    • CCRIS 1356
    • HSDB 175
    • UNII-AUG1H506LY
    • EINECS 204-062-1
    • AUG1H506LY
    • CH2=CH-CH3
    • R 1270
    • CHEBI:16052
    • Propene-1-13C (gas)
    • CH3CH=CH2
    • Propene (3,3,3-D3)
    • Propene (2.0-3.5% in Hexane)
    • Propene (2.0-3.5% in Heptane)
    • MFCD00009279
    • PROPYLENE (IARC)
    • PROPYLENE [IARC]
    • R-1270
    • MFCD00084447
    • UN1077
    • Polipropene 25
    • EINECS 292-050-7
    • prop-1-en-3-yl
    • Propylene, >=99%
    • PROPYLENE [MI]
    • PROPYLENE [HSDB]
    • 90530-12-4
    • 97102-85-7
    • Propene (1-2% in Toluene)
    • CHEMBL117213
    • DTXSID5021205
    • DTXSID70941638
    • c0067
    • UN2850
    • AKOS009156831
    • UN 1077
    • Propylene, 99.5%, Messer(R) CANGas
    • NS00001068
    • P2816
    • P2817
    • InChI=1/C3H6/c1-3-2/h3H,1H2,2H
    • Propylene tetramer [UN2850] [Flammable liquid]
    • Q151324
    • 1-Propene,ammoxidized,by-products from,thermal-cracked
    • 204-062-1

  • Applications

    Propylene (CAS 115-07-1) is a major petrochemical feedstock and chemical intermediate used across plastics, chemicals and coatings. Primarily it is polymerized to produce polypropylene resins for packaging, automotive parts, and fiber applications; it is also converted to propylene oxide, a key intermediate for polyurethanes, polyether polyols, solvents, coatings and specialty polymers. In addition, it participates in the cumene process to make phenol and acetone, supplying widely used solvents and chemical building blocks. Through controlled oxidation it can be converted to acrolein and from there to acrylic acid and acrylate esters for the coatings and adhesives industries. It can be further hydrogenated to isopropanol, a common solvent and chemical intermediate. These applications reflect propylene’s role as a versatile building block in polymer, chemical and manufacturing sectors, subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 320.08
    methanol 264.86
    isopropanol 271.75
    water 0.58
    ethyl acetate 155.54
    n-propanol 292.49
    acetone 223.35
    n-butanol 325.69
    acetonitrile 116.32
    DMF 187.34
    toluene 74.05
    isobutanol 204.27
    1,4-dioxane 248.66
    methyl acetate 125.64
    THF 484.53
    2-butanone 188.2
    n-pentanol 184.69
    sec-butanol 252.26
    n-hexane 198.03
    ethylene glycol 89.93
    NMP 192.89
    cyclohexane 182.0
    DMSO 230.06
    n-butyl acetate 327.68
    n-octanol 157.34
    chloroform 242.71
    n-propyl acetate 116.09
    acetic acid 239.4
    dichloromethane 177.86
    cyclohexanone 246.95
    propylene glycol 153.38
    isopropyl acetate 96.94
    DMAc 146.53
    2-ethoxyethanol 150.35
    isopentanol 220.29
    n-heptane 346.76
    ethyl formate 82.94
    1,2-dichloroethane 123.57
    n-hexanol 523.26
    2-methoxyethanol 274.52
    isobutyl acetate 87.6
    tetrachloromethane 89.63
    n-pentyl acetate 96.23
    transcutol 409.96
    n-heptanol 179.73
    ethylbenzene 44.14
    MIBK 104.0
    2-propoxyethanol 413.07
    tert-butanol 323.66
    MTBE 218.39
    2-butoxyethanol 186.3
    propionic acid 193.44
    o-xylene 52.98
    formic acid 56.91
    diethyl ether 242.06
    m-xylene 54.93
    p-xylene 53.33
    chlorobenzene 78.09
    dimethyl carbonate 42.17
    n-octane 70.37
    formamide 48.23
    cyclopentanone 277.85
    2-pentanone 179.3
    anisole 78.54
    cyclopentyl methyl ether 251.02
    gamma-butyrolactone 208.5
    1-methoxy-2-propanol 238.92
    pyridine 156.61
    3-pentanone 135.65
    furfural 153.83
    n-dodecane 37.51
    diethylene glycol 221.98
    diisopropyl ether 92.65
    tert-amyl alcohol 259.01
    acetylacetone 116.21
    n-hexadecane 38.97
    acetophenone 61.75
    methyl propionate 119.65
    isopentyl acetate 231.7
    trichloroethylene 170.91
    n-nonanol 137.82
    cyclohexanol 250.91
    benzyl alcohol 62.84
    2-ethylhexanol 331.93
    isooctanol 121.89
    dipropyl ether 431.26
    1,2-dichlorobenzene 60.23
    ethyl lactate 61.1
    propylene carbonate 124.51
    n-methylformamide 94.6
    2-pentanol 240.11
    n-pentane 173.34
    1-propoxy-2-propanol 433.18
    1-methoxy-2-propyl acetate 181.48
    2-(2-methoxypropoxy) propanol 152.92
    mesitylene 40.42
    ε-caprolactone 175.98
    p-cymene 80.26
    epichlorohydrin 178.68
    1,1,1-trichloroethane 152.06
    2-aminoethanol 161.83
    morpholine-4-carbaldehyde 180.05
    sulfolane 234.34
    2,2,4-trimethylpentane 60.92
    2-methyltetrahydrofuran 344.77
    n-hexyl acetate 139.52
    isooctane 51.12
    2-(2-butoxyethoxy)ethanol 203.86
    sec-butyl acetate 75.92
    tert-butyl acetate 111.92
    decalin 54.66
    glycerin 159.83
    diglyme 274.07
    acrylic acid 132.87
    isopropyl myristate 78.64
    n-butyric acid 261.89
    acetyl acetate 84.43
    di(2-ethylhexyl) phthalate 64.87
    ethyl propionate 96.01
    nitromethane 150.34
    1,2-diethoxyethane 195.87
    benzonitrile 71.46
    trioctyl phosphate 59.95
    1-bromopropane 174.15
    gamma-valerolactone 231.02
    n-decanol 110.93
    triethyl phosphate 69.63
    4-methyl-2-pentanol 117.61
    propionitrile 131.93
    vinylene carbonate 90.11
    1,1,2-trichlorotrifluoroethane 171.47
    DMS 75.17
    cumene 37.07
    2-octanol 103.68
    2-hexanone 146.09
    octyl acetate 101.29
    limonene 167.47
    1,2-dimethoxyethane 223.48
    ethyl orthosilicate 77.87
    tributyl phosphate 69.63
    diacetone alcohol 151.06
    N,N-dimethylaniline 62.62
    acrylonitrile 102.96
    aniline 95.16
    1,3-propanediol 195.31
    bromobenzene 76.2
    dibromomethane 178.01
    1,1,2,2-tetrachloroethane 160.45
    2-methyl-cyclohexyl acetate 133.78
    tetrabutyl urea 93.42
    diisobutyl methanol 161.03
    2-phenylethanol 126.2
    styrene 56.01
    dioctyl adipate 99.09
    dimethyl sulfate 53.49
    ethyl butyrate 196.68
    methyl lactate 74.11
    butyl lactate 95.83
    diethyl carbonate 99.07
    propanediol butyl ether 161.52
    triethyl orthoformate 136.48
    p-tert-butyltoluene 83.47
    methyl 4-tert-butylbenzoate 89.25
    morpholine 300.12
    tert-butylamine 254.13
    n-dodecanol 94.4
    dimethoxymethane 143.74
    ethylene carbonate 83.74
    cyrene 83.08
    2-ethoxyethyl acetate 92.67
    2-ethylhexyl acetate 196.23
    1,2,4-trichlorobenzene 69.79
    4-methylpyridine 132.04
    dibutyl ether 205.24
    2,6-dimethyl-4-heptanol 161.03
    DEF 149.45
    dimethyl isosorbide 192.49
    tetrachloroethylene 125.13
    eugenol 88.38
    triacetin 107.08
    span 80 197.16
    1,4-butanediol 84.84
    1,1-dichloroethane 153.66
    2-methyl-1-pentanol 141.11
    methyl formate 62.76
    2-methyl-1-butanol 212.79
    n-decane 61.47
    butyronitrile 164.33
    3,7-dimethyl-1-octanol 154.4
    1-chlorooctane 105.32
    1-chlorotetradecane 49.77
    n-nonane 74.28
    undecane 45.43
    tert-butylcyclohexane 60.32
    cyclooctane 75.98
    cyclopentanol 275.35
    tetrahydropyran 359.48
    tert-amyl methyl ether 174.8
    2,5,8-trioxanonane 216.65
    1-hexene 255.55
    2-isopropoxyethanol 117.55
    2,2,2-trifluoroethanol 56.35
    methyl butyrate 122.97

    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