Ethyl Maltol

Overview IFRA Request a quote

  • Identifiers

    CAS number
    4940-11-8

    Molecular formula
    C7H8O3

    SMILES
    CCC1=C(C(=O)C=CO1)O

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fruity 91.32%
    Sweet 88.05%
    Caramellic 85.36%
    Strawberry 56.21%
    Berry 53.17%
    Burnt 50.37%
    Tropical 30.64%
    Buttery 27.5%
    Creamy 26.48%
    Pineapple 26.29%

    Scent© AI

  • Properties

    XLogP3-AA
    0.8

    Molecular weight
    140.14 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Melting point expt.

    • 90 - 91 °C

    Boiling point

    • 289.00 to 290.00 °C. @ 760.00 mm Hg

    Flash point est.
    103.83 ˚C

    Solubility expt.

    • Sparingly soluble in water, soluble in propylene glycol
    • Soluble (in ethanol)

  • Synonyms

    • Ethyl maltol
    • 2-Ethyl-3-hydroxy-4H-pyran-4-one
    • 4940-11-8
    • 2-Ethyl-3-hydroxy-4-pyrone
    • Ethylmaltol
    • Veltol plus
    • 2-ethyl-3-hydroxypyran-4-one
    • 3-Hydroxy-2-ethyl-4-pyrone
    • 4H-PYRAN-4-ONE, 2-ETHYL-3-HYDROXY-
    • 2-Ethylpyromeconic acid
    • 2-Ethyl pyromeconic acid
    • Ethyl Hydroxypyrone
    • 3-Hydroxy-2-ethyl-1,4-pyrone
    • 3-Hydroxy-2-ethyl-4H-pyran-4-one
    • FEMA No. 3487
    • Maltol-ethyl
    • Ethyl maltol [NF]
    • 3-Hydroxy-2-ethyl-gamma-pyrone
    • DTXSID5041516
    • L6Q8K29L05
    • EINECS 225-582-5
    • NSC638851
    • ETHYL MALTOL [II]
    • ETHYL MALTOL [MI]
    • NSC-638851
    • ETHYL MALTOL [FCC]
    • BRN 1618110
    • ETHYL MALTOL [FHFI]
    • E637
    • ETHYL MALTOL [VANDF]
    • ETHYL MALTOL [MART.]
    • UNII-L6Q8K29L05
    • ETHYL MALTOL [USP-RS]
    • INS NO.637
    • DTXCID3021516
    • INS-637
    • 3-Hydroxy-2-ethyl-.gamma.-pyrone
    • E-637
    • ETHYL MALTOL (II)
    • 5-18-01-00135 (Beilstein Handbook Reference)
    • ETHYL MALTOL (MART.)
    • ETHYL MALTOL (USP-RS)
    • indium ethylmaltol
    • MFCD00059795
    • 2-Ethyl-3-hydroxy-pyran-4-one
    • Ethyl maltol (Standard)
    • SCHEMBL41817
    • INS No. 637
    • CHEMBL121557
    • FEMA 3487
    • Ethyl maltol, analytical standard
    • CHEBI:169105
    • ETHYL HYDROXYPYRONE [INCI]
    • HY-W010320R
    • Tox21_300800
    • BBL036457
    • Ethyl maltol, >=99%, FCC, FG
    • s6335
    • STL559005
    • AKOS015915123
    • CS-W011036
    • HY-W010320
    • 3-Hydroxy-2-ethyl-4-pyrone11/8/40
    • MSK001161-1000M
    • NCGC00248174-01
    • NCGC00254704-01
    • AS-13959
    • BP-12441
    • FE159267
    • CAS-4940-11-8
    • 2-Ethyl-3-hydroxy-4H-pyran-4-one, 99%
    • 3-Hydroxy-2-ethyl-laquo gammaRaquo -pyrone
    • H0550
    • NS00012427
    • EN300-99262
    • C20362
    • Ethyl maltol Solution in Methanol, 1000ug/mL
    • H10673
    • Q930843
    • 2-Ethyl-3-hydroxy-4-pyrone;3-Hydroxy-2-ethyl-4-pyrone
    • Z1255465165
    • Ethyl maltol, United States Pharmacopeia (USP) Reference Standard
    • Ethyl maltol, Pharmaceutical Secondary Standard; Certified Reference Material

  • Applications

    Ethyl maltol (CAS 4940-11-8) is a broad-spectrum flavor enhancer and sweet-taste potentiator, listed as food additive E637, able to magnify and round off caramel, cotton candy, fruity, chocolate, coffee, dairy and fermented milk notes, therefore widely used in hard and soft candies, biscuits, breads, ice creams, yogurts, jams, carbonated and still beverages, wines, canned goods, liquid seasonings, sauces, instant noodles and processed meat products; at very low levels (typically 5-50 ppm) it masks metallic or bitter off-tastes of artificial sweeteners, suppresses animal fishiness and lifts overall aroma; beyond food, ethyl maltol is added to tobacco, cigars and e-liquid flavor bases to impart a pleasant sweetness, employed in personal-care products and perfumery to create gourmand effects, and used in pharmaceutical syrups and chewable tablets to obscure active-ingredient bitterness, while its high safety margin, good thermal stability and mild iron-chelating ability also allow it to act as a color stabilizer and light antioxidant in numerous formulations.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 162.62
    methanol 324.93
    isopropanol 97.7
    water 10.37
    ethyl acetate 216.28
    n-propanol 112.19
    acetone 454.08
    n-butanol 89.58
    acetonitrile 326.96
    DMF 717.06
    toluene 53.92
    isobutanol 72.36
    1,4-dioxane 588.45
    methyl acetate 277.45
    THF 452.93
    2-butanone 243.37
    n-pentanol 87.61
    sec-butanol 78.72
    n-hexane 9.04
    ethylene glycol 153.37
    NMP 440.23
    cyclohexane 9.99
    DMSO 1171.08
    n-butyl acetate 168.32
    n-octanol 70.12
    chloroform 273.44
    n-propyl acetate 180.45
    acetic acid 293.06
    dichloromethane 436.31
    cyclohexanone 271.15
    propylene glycol 64.07
    isopropyl acetate 119.96
    DMAc 397.49
    2-ethoxyethanol 309.85
    isopentanol 86.08
    n-heptane 10.29
    ethyl formate 216.26
    1,2-dichloroethane 380.39
    n-hexanol 89.99
    2-methoxyethanol 456.33
    isobutyl acetate 88.96
    tetrachloromethane 54.96
    n-pentyl acetate 115.1
    transcutol 535.81
    n-heptanol 60.61
    ethylbenzene 46.79
    MIBK 121.97
    2-propoxyethanol 242.23
    tert-butanol 158.99
    MTBE 151.04
    2-butoxyethanol 151.19
    propionic acid 175.72
    o-xylene 59.88
    formic acid 250.06
    diethyl ether 152.54
    m-xylene 55.07
    p-xylene 65.84
    chlorobenzene 134.4
    dimethyl carbonate 153.24
    n-octane 7.04
    formamide 452.06
    cyclopentanone 378.48
    2-pentanone 186.86
    anisole 150.49
    cyclopentyl methyl ether 143.42
    gamma-butyrolactone 559.79
    1-methoxy-2-propanol 246.42
    pyridine 230.77
    3-pentanone 157.08
    furfural 510.6
    n-dodecane 7.78
    diethylene glycol 290.72
    diisopropyl ether 48.81
    tert-amyl alcohol 115.65
    acetylacetone 296.71
    n-hexadecane 8.96
    acetophenone 152.22
    methyl propionate 197.63
    isopentyl acetate 133.6
    trichloroethylene 546.15
    n-nonanol 61.93
    cyclohexanol 74.56
    benzyl alcohol 113.39
    2-ethylhexanol 62.04
    isooctanol 54.27
    dipropyl ether 77.18
    1,2-dichlorobenzene 143.88
    ethyl lactate 105.84
    propylene carbonate 236.77
    n-methylformamide 412.98
    2-pentanol 60.91
    n-pentane 8.36
    1-propoxy-2-propanol 146.26
    1-methoxy-2-propyl acetate 155.25
    2-(2-methoxypropoxy) propanol 141.25
    mesitylene 44.38
    ε-caprolactone 242.59
    p-cymene 40.33
    epichlorohydrin 589.21
    1,1,1-trichloroethane 209.4
    2-aminoethanol 144.43
    morpholine-4-carbaldehyde 542.75
    sulfolane 819.09
    2,2,4-trimethylpentane 10.26
    2-methyltetrahydrofuran 245.1
    n-hexyl acetate 148.45
    isooctane 8.9
    2-(2-butoxyethoxy)ethanol 201.81
    sec-butyl acetate 98.64
    tert-butyl acetate 144.51
    decalin 12.51
    glycerin 161.01
    diglyme 436.02
    acrylic acid 212.9
    isopropyl myristate 61.11
    n-butyric acid 167.47
    acetyl acetate 147.13
    di(2-ethylhexyl) phthalate 56.67
    ethyl propionate 147.68
    nitromethane 844.16
    1,2-diethoxyethane 189.64
    benzonitrile 169.62
    trioctyl phosphate 49.47
    1-bromopropane 117.93
    gamma-valerolactone 550.27
    n-decanol 49.55
    triethyl phosphate 71.54
    4-methyl-2-pentanol 52.5
    propionitrile 175.6
    vinylene carbonate 257.66
    1,1,2-trichlorotrifluoroethane 347.59
    DMS 162.36
    cumene 40.35
    2-octanol 51.08
    2-hexanone 156.78
    octyl acetate 79.87
    limonene 51.72
    1,2-dimethoxyethane 490.64
    ethyl orthosilicate 65.57
    tributyl phosphate 57.96
    diacetone alcohol 168.26
    N,N-dimethylaniline 97.48
    acrylonitrile 298.6
    aniline 93.12
    1,3-propanediol 193.97
    bromobenzene 131.35
    dibromomethane 239.11
    1,1,2,2-tetrachloroethane 365.02
    2-methyl-cyclohexyl acetate 85.46
    tetrabutyl urea 78.5
    diisobutyl methanol 48.73
    2-phenylethanol 107.65
    styrene 63.91
    dioctyl adipate 85.19
    dimethyl sulfate 315.75
    ethyl butyrate 118.3
    methyl lactate 138.7
    butyl lactate 86.78
    diethyl carbonate 92.49
    propanediol butyl ether 131.77
    triethyl orthoformate 81.88
    p-tert-butyltoluene 40.36
    methyl 4-tert-butylbenzoate 127.76
    morpholine 411.58
    tert-butylamine 81.8
    n-dodecanol 40.05
    dimethoxymethane 406.93
    ethylene carbonate 214.14
    cyrene 152.54
    2-ethoxyethyl acetate 176.66
    2-ethylhexyl acetate 101.53
    1,2,4-trichlorobenzene 161.46
    4-methylpyridine 197.74
    dibutyl ether 74.93
    2,6-dimethyl-4-heptanol 48.73
    DEF 242.37
    dimethyl isosorbide 244.41
    tetrachloroethylene 264.06
    eugenol 138.18
    triacetin 146.03
    span 80 100.65
    1,4-butanediol 107.6
    1,1-dichloroethane 213.91
    2-methyl-1-pentanol 79.62
    methyl formate 428.22
    2-methyl-1-butanol 71.88
    n-decane 10.97
    butyronitrile 145.23
    3,7-dimethyl-1-octanol 61.77
    1-chlorooctane 47.85
    1-chlorotetradecane 22.89
    n-nonane 10.06
    undecane 9.02
    tert-butylcyclohexane 13.3
    cyclooctane 6.11
    cyclopentanol 98.34
    tetrahydropyran 209.18
    tert-amyl methyl ether 113.22
    2,5,8-trioxanonane 277.24
    1-hexene 34.8
    2-isopropoxyethanol 180.86
    2,2,2-trifluoroethanol 156.09
    methyl butyrate 209.2

    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