2-Phenylpropanal propylene glycol acetal

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  • Identifiers

    CAS number
    67634-23-5

    Molecular formula
    C12H16O2

    SMILES
    CC1COC(O1)C(C)C2=CC=CC=C2

  • Odor profile

    Fragrance
    Green 87.31%
    Fruity 71.3%
    Floral 69.16%
    Fresh 49.94%
    Earthy 46.88%
    Hyacinth 40.35%
    Sweet 37.95%
    Leafy 35.72%
    Rose 33.51%
    Melon 33.27%

     

    Flavor
    Green 67.02%
    Floral 49.34%
    Bitter 42.01%
    Sweet 35.57%
    Earthy 35.52%
    Tropical 28.64%
    Herbal 28.19%
    Metallic 25.94%
    Fresh 23.76%
    Woody 23.74%

     

    Odor impact est.
    Medium

  • Properties

    XLogP3-AA
    2.6

    pKa est.
    6.56 (neutral)

    Molecular weight
    192.25 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Slow

    Boiling point est.
    252°C

    Flash point

    • 100.76 ˚C est.

    Solubility expt.

    • Insoluble
    • Soluble (in ethanol)

  • Synonyms

    • 4-Methyl-2-(1-phenylethyl)-1,3-dioxolane
    • 67634-23-5
    • melon acetal
    • 2-Phenylpropanal propylene glycol acetal
    • 4-Methyl-2-(1-phenylethyl)-1,3-dioxolan
    • Hydratropaldehyde propyleneglycol acetal
    • Hydratropic aldehyde propylene glycol acetal
    • 1,3-Dioxolane, 4-methyl-2-(1-phenylethyl)-
    • 1ZRR9A405A
    • 2-Phenylpropionaldehyde propylene glycol acetal
    • EINECS 266-828-1
    • NSC 39434
    • NSC-39434
    • 2-(alpha-Methylbenzyl)-4-methyl-1,3-dioxolane
    • 4-Methyl-2-(alpha-methylbenzyl)-1,3-dioxolane
    • DTXSID7052361
    • FEMA NO. 4595
    • 4-Methyl-2-(1-phenylethyl)-1,3-dioxolane, 9CI
    • 1,3-Dioxolane,4-methyl-2-(1-phenylethyl)-
    • UNII-1ZRR9A405A
    • SCHEMBL3504825
    • DTXCID7030933
    • CHEBI:179915
    • KHLVXMUGPANNQD-UHFFFAOYSA-N
    • NSC39434
    • 1, 4-methyl-2-(1-phenylethyl)-
    • AKOS006271848
    • NS00012972
    • Q27253344
    • (+/-)-2-PHENYLPROPANAL PROPYLENE GLYCOL ACETAL
    • 2-PHENYLPROPANAL PROPYLENE GLYCOL ACETAL, (+/-)-
    • 266-828-1

  • Applications

    The chemical 2-Phenylpropanal propylene glycol acetal (CAS number: 67634-23-5) is primarily encountered as a fragrance ingredient and odorant in perfumery and cosmetics, where it can function as a fixed or carrier note. It may also be used in household products such as cleaners and air fresheners to impart or stabilize aroma profiles. In industrial manufacturing, it can serve as an aldehyde-derived intermediate and as a protecting group in organic synthesis, and as a solvent or processing aid in coatings and inks. Additionally, it is sometimes evaluated for use in polymer and plastics formulations where controlled volatility and scent release are desired.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 690.02
    methanol 691.11
    isopropanol 443.38
    water 3.81
    ethyl acetate 631.02
    n-propanol 481.33
    acetone 445.18
    n-butanol 508.78
    acetonitrile 592.81
    DMF 305.68
    toluene 318.8
    isobutanol 360.2
    1,4-dioxane 1281.55
    methyl acetate 456.36
    THF 888.9
    2-butanone 382.8
    n-pentanol 398.7
    sec-butanol 325.94
    n-hexane 69.68
    ethylene glycol 155.26
    NMP 257.58
    cyclohexane 133.86
    DMSO 414.34
    n-butyl acetate 447.23
    n-octanol 199.21
    chloroform 2549.61
    n-propyl acetate 377.6
    acetic acid 598.12
    dichloromethane 2196.86
    cyclohexanone 550.18
    propylene glycol 166.84
    isopropyl acetate 382.3
    DMAc 372.91
    2-ethoxyethanol 588.22
    isopentanol 459.39
    n-heptane 55.98
    ethyl formate 362.39
    1,2-dichloroethane 1019.98
    n-hexanol 421.47
    2-methoxyethanol 626.8
    isobutyl acetate 294.47
    tetrachloromethane 296.72
    n-pentyl acetate 229.35
    transcutol 1383.69
    n-heptanol 181.4
    ethylbenzene 181.0
    MIBK 276.51
    2-propoxyethanol 620.46
    tert-butanol 513.03
    MTBE 475.61
    2-butoxyethanol 311.01
    propionic acid 345.87
    o-xylene 181.04
    formic acid 192.44
    diethyl ether 700.75
    m-xylene 209.09
    p-xylene 231.17
    chlorobenzene 446.2
    dimethyl carbonate 181.06
    n-octane 27.69
    formamide 217.19
    cyclopentanone 459.94
    2-pentanone 367.01
    anisole 364.61
    cyclopentyl methyl ether 411.97
    gamma-butyrolactone 569.01
    1-methoxy-2-propanol 447.67
    pyridine 623.2
    3-pentanone 298.64
    furfural 537.0
    n-dodecane 27.98
    diethylene glycol 453.36
    diisopropyl ether 178.42
    tert-amyl alcohol 336.12
    acetylacetone 422.87
    n-hexadecane 31.41
    acetophenone 309.68
    methyl propionate 335.5
    isopentyl acetate 398.07
    trichloroethylene 1564.25
    n-nonanol 174.49
    cyclohexanol 374.38
    benzyl alcohol 293.16
    2-ethylhexanol 240.89
    isooctanol 157.63
    dipropyl ether 313.13
    1,2-dichlorobenzene 408.64
    ethyl lactate 175.84
    propylene carbonate 448.0
    n-methylformamide 206.72
    2-pentanol 306.33
    n-pentane 69.57
    1-propoxy-2-propanol 368.32
    1-methoxy-2-propyl acetate 380.63
    2-(2-methoxypropoxy) propanol 291.32
    mesitylene 138.18
    ε-caprolactone 532.46
    p-cymene 117.21
    epichlorohydrin 848.35
    1,1,1-trichloroethane 780.34
    2-aminoethanol 269.69
    morpholine-4-carbaldehyde 500.57
    sulfolane 470.51
    2,2,4-trimethylpentane 44.25
    2-methyltetrahydrofuran 611.83
    n-hexyl acetate 329.39
    isooctane 36.24
    2-(2-butoxyethoxy)ethanol 406.88
    sec-butyl acetate 275.61
    tert-butyl acetate 339.53
    decalin 68.88
    glycerin 223.55
    diglyme 761.94
    acrylic acid 287.67
    isopropyl myristate 139.68
    n-butyric acid 571.05
    acetyl acetate 437.84
    di(2-ethylhexyl) phthalate 131.43
    ethyl propionate 299.56
    nitromethane 564.4
    1,2-diethoxyethane 552.18
    benzonitrile 380.46
    trioctyl phosphate 94.59
    1-bromopropane 592.89
    gamma-valerolactone 583.91
    n-decanol 131.01
    triethyl phosphate 152.79
    4-methyl-2-pentanol 198.09
    propionitrile 442.51
    vinylene carbonate 463.97
    1,1,2-trichlorotrifluoroethane 512.14
    DMS 262.4
    cumene 133.35
    2-octanol 121.88
    2-hexanone 311.06
    octyl acetate 165.91
    limonene 157.42
    1,2-dimethoxyethane 824.29
    ethyl orthosilicate 153.74
    tributyl phosphate 124.6
    diacetone alcohol 291.34
    N,N-dimethylaniline 228.01
    acrylonitrile 432.64
    aniline 342.03
    1,3-propanediol 402.25
    bromobenzene 503.08
    dibromomethane 1340.04
    1,1,2,2-tetrachloroethane 1219.78
    2-methyl-cyclohexyl acetate 238.02
    tetrabutyl urea 141.4
    diisobutyl methanol 138.56
    2-phenylethanol 282.68
    styrene 239.29
    dioctyl adipate 183.93
    dimethyl sulfate 205.32
    ethyl butyrate 327.68
    methyl lactate 172.13
    butyl lactate 167.85
    diethyl carbonate 238.52
    propanediol butyl ether 252.7
    triethyl orthoformate 224.63
    p-tert-butyltoluene 113.25
    methyl 4-tert-butylbenzoate 245.0
    morpholine 943.09
    tert-butylamine 346.38
    n-dodecanol 103.27
    dimethoxymethane 433.65
    ethylene carbonate 434.31
    cyrene 250.01
    2-ethoxyethyl acetate 318.57
    2-ethylhexyl acetate 294.33
    1,2,4-trichlorobenzene 432.96
    4-methylpyridine 534.0
    dibutyl ether 252.31
    2,6-dimethyl-4-heptanol 138.56
    DEF 377.45
    dimethyl isosorbide 399.13
    tetrachloroethylene 849.44
    eugenol 240.78
    triacetin 305.19
    span 80 234.02
    1,4-butanediol 213.26
    1,1-dichloroethane 966.31
    2-methyl-1-pentanol 349.55
    methyl formate 201.46
    2-methyl-1-butanol 379.08
    n-decane 44.13
    butyronitrile 543.58
    3,7-dimethyl-1-octanol 188.19
    1-chlorooctane 155.1
    1-chlorotetradecane 70.04
    n-nonane 42.92
    undecane 33.85
    tert-butylcyclohexane 62.67
    cyclooctane 45.64
    cyclopentanol 286.58
    tetrahydropyran 867.15
    tert-amyl methyl ether 296.17
    2,5,8-trioxanonane 492.25
    1-hexene 244.3
    2-isopropoxyethanol 419.18
    2,2,2-trifluoroethanol 229.13
    methyl butyrate 397.23

    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