1-Pyrroline

Overview IFRA Botanical Request a quote

  • Identifiers

    CAS number
    5724-81-2

    Molecular formula
    C4H7N

    SMILES
    C1CC=NC1

  • Odor profile

    Fishy 68.61%
    Cheesy 51.87%
    Meaty 49.51%
    Roasted 47.78%
    Nutty 41.65%
    Popcorn 37.03%
    Musty 31.65%
    Buttery 30.65%
    Animal 30.49%
    Vegetable 28.87%

    Scent© AI

  • Properties

    XLogP3-AA
    -0.3

    Molecular weight
    69.11 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Boiling point

    • 87.00 to 89.00 °C. @ 760.00 mm Hg

    Flash point est.
    3.61 ˚C

    Solubility expt.

    • Soluble in water
    • Soluble (in ethanol)

  • Synonyms

    • 1-Pyrroline
    • 3,4-Dihydro-2H-pyrrole
    • 5724-81-2
    • delta(1)-Pyrroline
    • 2H-Pyrrole, 3,4-dihydro-
    • EINECS 227-230-6
    • UNII-2SK2I7766O
    • ISOPYRROLINE
    • CHEBI:19092
    • .DELTA.1-PYRROLINE
    • 1-PYRROLINE [FHFI]
    • FEMA NO. 3898
    • DTXSID10863608
    • 2SK2I7766O
    • 2H-PYRROLENINE, 3,4-DIHYDRO-
    • delta-pyrrolinium
    • DELTA1-PYRROLINE
    • 3,4-Dihydro-(2H)-pyrroline
    • DTXCID30219007
    • NS00047335
    • Q161680

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 381.69
    methanol 452.66
    isopropanol 226.38
    water 10.26
    ethyl acetate 140.45
    n-propanol 253.85
    acetone 314.96
    n-butanol 198.94
    acetonitrile 229.67
    DMF 417.05
    toluene 83.38
    isobutanol 162.4
    1,4-dioxane 269.95
    methyl acetate 178.12
    THF 373.98
    2-butanone 208.99
    n-pentanol 143.19
    sec-butanol 179.82
    n-hexane 35.48
    ethylene glycol 239.95
    NMP 342.97
    cyclohexane 53.34
    DMSO 464.56
    n-butyl acetate 144.81
    n-octanol 90.74
    chloroform 593.16
    n-propyl acetate 86.23
    acetic acid 666.08
    dichloromethane 428.82
    cyclohexanone 202.67
    propylene glycol 275.29
    isopropyl acetate 72.64
    DMAc 326.24
    2-ethoxyethanol 215.44
    isopentanol 128.61
    n-heptane 50.77
    ethyl formate 90.42
    1,2-dichloroethane 204.8
    n-hexanol 204.93
    2-methoxyethanol 349.01
    isobutyl acetate 56.73
    tetrachloromethane 117.14
    n-pentyl acetate 64.32
    transcutol 588.04
    n-heptanol 81.67
    ethylbenzene 36.6
    MIBK 69.22
    2-propoxyethanol 306.72
    tert-butanol 194.62
    MTBE 119.5
    2-butoxyethanol 154.41
    propionic acid 311.81
    o-xylene 56.43
    formic acid 269.85
    diethyl ether 163.53
    m-xylene 52.93
    p-xylene 48.57
    chlorobenzene 117.85
    dimethyl carbonate 68.99
    n-octane 14.38
    formamide 213.85
    cyclopentanone 279.61
    2-pentanone 138.32
    anisole 91.22
    cyclopentyl methyl ether 167.01
    gamma-butyrolactone 266.35
    1-methoxy-2-propanol 250.94
    pyridine 272.8
    3-pentanone 130.71
    furfural 249.55
    n-dodecane 13.04
    diethylene glycol 316.8
    diisopropyl ether 40.16
    tert-amyl alcohol 145.61
    acetylacetone 128.19
    n-hexadecane 13.62
    acetophenone 85.16
    methyl propionate 137.69
    isopentyl acetate 97.68
    trichloroethylene 381.1
    n-nonanol 78.62
    cyclohexanol 155.12
    benzyl alcohol 101.18
    2-ethylhexanol 105.31
    isooctanol 56.93
    dipropyl ether 133.5
    1,2-dichlorobenzene 100.55
    ethyl lactate 70.47
    propylene carbonate 131.26
    n-methylformamide 229.41
    2-pentanol 120.4
    n-pentane 43.58
    1-propoxy-2-propanol 224.55
    1-methoxy-2-propyl acetate 130.0
    2-(2-methoxypropoxy) propanol 155.34
    mesitylene 31.65
    ε-caprolactone 153.47
    p-cymene 43.49
    epichlorohydrin 232.42
    1,1,1-trichloroethane 206.65
    2-aminoethanol 307.74
    morpholine-4-carbaldehyde 306.88
    sulfolane 315.5
    2,2,4-trimethylpentane 19.26
    2-methyltetrahydrofuran 243.73
    n-hexyl acetate 94.92
    isooctane 12.28
    2-(2-butoxyethoxy)ethanol 215.36
    sec-butyl acetate 51.1
    tert-butyl acetate 68.35
    decalin 19.86
    glycerin 335.12
    diglyme 301.78
    acrylic acid 342.06
    isopropyl myristate 44.85
    n-butyric acid 229.98
    acetyl acetate 101.42
    di(2-ethylhexyl) phthalate 57.31
    ethyl propionate 71.39
    nitromethane 423.54
    1,2-diethoxyethane 147.0
    benzonitrile 105.88
    trioctyl phosphate 38.9
    1-bromopropane 157.3
    gamma-valerolactone 274.07
    n-decanol 61.63
    triethyl phosphate 43.6
    4-methyl-2-pentanol 60.99
    propionitrile 156.97
    vinylene carbonate 124.63
    1,1,2-trichlorotrifluoroethane 363.41
    DMS 89.18
    cumene 29.85
    2-octanol 47.48
    2-hexanone 100.84
    octyl acetate 63.28
    limonene 74.7
    1,2-dimethoxyethane 206.33
    ethyl orthosilicate 43.48
    tributyl phosphate 47.24
    diacetone alcohol 115.63
    N,N-dimethylaniline 71.35
    acrylonitrile 197.5
    aniline 150.45
    1,3-propanediol 236.16
    bromobenzene 111.51
    dibromomethane 306.79
    1,1,2,2-tetrachloroethane 325.36
    2-methyl-cyclohexyl acetate 71.71
    tetrabutyl urea 65.1
    diisobutyl methanol 51.49
    2-phenylethanol 120.56
    styrene 56.94
    dioctyl adipate 72.02
    dimethyl sulfate 104.72
    ethyl butyrate 85.67
    methyl lactate 118.24
    butyl lactate 77.56
    diethyl carbonate 54.55
    propanediol butyl ether 183.47
    triethyl orthoformate 62.99
    p-tert-butyltoluene 42.13
    methyl 4-tert-butylbenzoate 83.59
    morpholine 325.29
    tert-butylamine 137.12
    n-dodecanol 50.46
    dimethoxymethane 175.47
    ethylene carbonate 97.41
    cyrene 111.69
    2-ethoxyethyl acetate 96.06
    2-ethylhexyl acetate 81.88
    1,2,4-trichlorobenzene 128.17
    4-methylpyridine 173.85
    dibutyl ether 79.69
    2,6-dimethyl-4-heptanol 51.49
    DEF 158.17
    dimethyl isosorbide 164.72
    tetrachloroethylene 244.49
    eugenol 99.19
    triacetin 114.75
    span 80 162.01
    1,4-butanediol 142.95
    1,1-dichloroethane 234.25
    2-methyl-1-pentanol 100.72
    methyl formate 141.0
    2-methyl-1-butanol 135.54
    n-decane 19.79
    butyronitrile 125.91
    3,7-dimethyl-1-octanol 80.98
    1-chlorooctane 52.77
    1-chlorotetradecane 25.82
    n-nonane 19.73
    undecane 15.33
    tert-butylcyclohexane 18.95
    cyclooctane 18.4
    cyclopentanol 204.79
    tetrahydropyran 247.89
    tert-amyl methyl ether 95.63
    2,5,8-trioxanonane 240.16
    1-hexene 82.41
    2-isopropoxyethanol 137.34
    2,2,2-trifluoroethanol 201.63
    methyl butyrate 85.33

    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

Botanical

Name CAS Botanical Proportion
Colocasia esculenta (Taro) Colocasia esculenta (L.) Schott, fam. Araceae 2.5%