Guaiazulene

Overview IFRA Botanical Request a quote

  • Identifiers

    CAS number
    489-84-9

    Molecular formula
    C15H18

    SMILES
    CC1=C2C=CC(=C2C=C(C=C1)C(C)C)C

    Safety labels

    Irritant
    Irritant

    Retention indicies (RI)

    • DB5: 1772.0

  • Odor profile

    Herbal 57.48%
    Spicy 55.78%
    Woody 51.14%
    Leathery 43.84%
    Phenolic 41.81%
    Earthy 41.29%
    Animal 35.34%
    Green 33.32%
    Medicinal 31.06%
    Dry 29.2%

    Scent© AI

  • Properties

    XLogP3-AA
    4.8

    Molecular weight
    198.3 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Very slow

    Melting point expt.

    • 31.5 °C

    Boiling point

    • 152.00 to 154.00 °C. @ 7.00 mm Hg

    Flash point est.
    114.76 ˚C

    Solubility expt.

    • 0.000664 mg/mL at 25 °C

  • Synonyms

    • guaiazulene
    • 489-84-9
    • 1,4-Dimethyl-7-isopropylazulene
    • Azulon
    • Vetivazulen
    • Azunol
    • 7-Isopropyl-1,4-dimethylazulene
    • Kessazulen
    • Purazulen
    • Silazulon
    • Uroazulen
    • S-Guaiazulene
    • guaiazulen
    • Eucazulen
    • Guajazulene
    • Guiazulene
    • Cuteazul
    • Gurjunazulen
    • Azulen-beris
    • 1,4-dimethyl-7-propan-2-ylazulene
    • 3,8-Dimethyl-5-(2-propyl)azulene
    • Azulene, 1,4-dimethyl-7-(1-methylethyl)-
    • Vaumigan
    • 1,4-Dimethyl-7-(1-methylethyl)azulene
    • Eucazulene
    • Azulol
    • hepatoprotectant
    • 1,4-dimethyl-7-(propan-2-yl)azulene
    • Azunol (TN)
    • Kessazulene
    • UNII-2OZ1K9JKQC
    • 7-isopropyl-1,4-dimethyl-azulene
    • NSC 4714
    • EINECS 207-701-2
    • Azulene, 7-isopropyl-1,4-dimethyl-
    • 1,3,5,7,9-Guaiapentaene
    • AZ-8 beris
    • BRN 1365001
    • CHEBI:5550
    • DTXSID7045996
    • AZULENE, 1,4-DIMETHYL-7-ISOPROPYL-
    • NSC-4714
    • GUAIAZULENE [MI]
    • 2OZ1K9JKQC
    • GUAIAZULENE [MART.]
    • 1,4-Dimethyl-7-isopropylazulene (JAN)
    • GUAIAZULENE [WHO-DD]
    • DTXCID5025996
    • 1, 4-Dimethyl-7-isopropylazulene
    • 1,4-Dimethyl-7-isopropyl-Azulene
    • 4-05-00-01751 (Beilstein Handbook Reference)
    • MFCD00003811
    • NCGC00095836-02
    • 1,4-dimethyl-7-(1-methylethyl)-azulene
    • 1,4-Dimethyl-7-(1-methyl)-azulene (azulon)
    • 1,4-Dimethyl-7-(1-methylethyl)azulene, 9CI
    • 1,4-DIMETHYL-7-ISOPROPYLAZULENE [JAN]
    • GUAIAZULENE (MART.)
    • GUAIAZULENE (CONSTITUENT OF CHAMOMILE) [DSC]
    • CAS-489-84-9
    • 7-isopropyl- 1,4-dimethylazulene
    • Guajazulen
    • Guaiazulene, 99%
    • Azulene,4-dimethyl-
    • Guaiazulene (Standard)
    • Spectrum_001198
    • Spectrum2_001089
    • Spectrum3_001537
    • Spectrum4_000762
    • Spectrum5_001090
    • GUAIAZULENE [INCI]
    • BSPBio_002954
    • KBioGR_001144
    • KBioSS_001678
    • MLS002207286
    • DivK1c_001006
    • SPECTRUM1502249
    • SPBio_001138
    • AZ-8
    • 1,4-Dimethyl-7-isopropylazulen
    • CHEMBL1408759
    • HMS503I13
    • HY-N6951R
    • KBio1_001006
    • KBio2_001678
    • KBio2_004246
    • KBio2_006814
    • KBio3_002454
    • Azulene,4-dimethyl-7-isopropyl-
    • NSC4714
    • NINDS_001006
    • HY-N6951
    • Tox21_111526
    • BBL027440
    • CCG-40099
    • s3995
    • STK801958
    • AKOS001082716
    • Tox21_111526_1
    • DB13329
    • FG34015
    • LMPR0103410006
    • SDCCGMLS-0066686.P001
    • WLN: L57J B1 F1 IY1&1
    • IDI1_001006
    • Azulene,4-dimethyl-7-(1-methylethyl)-
    • NCGC00095836-01
    • NCGC00095836-03
    • NCGC00095836-05
    • NCGC00178373-01
    • AS-13972
    • SMR001306801
    • DB-051592
    • 1,4-Dimethyl-7-isopropylazulene;Guaiazulene
    • Azulene, 7-isopropyl-1,4-dimethyl- (8CI)
    • CS-0021588
    • G0228
    • NS00008692
    • 7-isopropyl-1,4-dimethyl-azulene;Guaiazulene
    • EN300-16623
    • GUAIAZULENE (CONSTITUENT OF CHAMOMILE)
    • A10803
    • C09675
    • D01037
    • A827639
    • SR-05000002441
    • Q3026266
    • SR-05000002441-1

  • Applications

    Guaiazulene (CAS 489-84-9) is a deep-blue natural azulene hydrocarbon used primarily as a soothing agent and colorant in cosmetics (creams, after-sun gels, post-shave products, masks, lip care) due to anti-inflammatory and antioxidant properties that help reduce redness; it is also included in topical dermatologic preparations to alleviate mild irritation, and in pharmaceuticals mainly via derivatives (e.g., sulfonate salts) that have been used as mucosal protectants; in research, guaiazulene serves as a chromophore and model dye for organic materials, spectroscopy, and reaction dynamics, and can act as a chromatographic standard; within formulations it imparts a soft blue tint with light coverage, contributes to photostability and radical scavenging, is compatible with many oils, esters, and polymers, and is typically used at low levels to deliver its characteristic soothing effect.

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 178.83
    methanol 62.26
    isopropanol 176.15
    water 0.04
    ethyl acetate 688.56
    n-propanol 225.5
    acetone 910.14
    n-butanol 244.57
    acetonitrile 307.54
    DMF 969.23
    toluene 911.38
    isobutanol 189.17
    1,4-dioxane 1441.32
    methyl acetate 619.09
    THF 2658.78
    2-butanone 1005.66
    n-pentanol 205.15
    sec-butanol 204.93
    n-hexane 292.07
    ethylene glycol 11.49
    NMP 766.55
    cyclohexane 338.82
    DMSO 333.39
    n-butyl acetate 1302.61
    n-octanol 242.42
    chloroform 1630.97
    n-propyl acetate 553.33
    acetic acid 99.51
    dichloromethane 2087.98
    cyclohexanone 1383.57
    propylene glycol 30.16
    isopropyl acetate 440.04
    DMAc 720.68
    2-ethoxyethanol 182.62
    isopentanol 220.83
    n-heptane 392.58
    ethyl formate 381.98
    1,2-dichloroethane 1309.87
    n-hexanol 500.73
    2-methoxyethanol 214.38
    isobutyl acetate 483.31
    tetrachloromethane 322.31
    n-pentyl acetate 535.31
    transcutol 534.42
    n-heptanol 231.71
    ethylbenzene 563.9
    MIBK 435.85
    2-propoxyethanol 417.65
    tert-butanol 259.46
    MTBE 681.81
    2-butoxyethanol 248.61
    propionic acid 142.98
    o-xylene 420.96
    formic acid 8.24
    diethyl ether 920.7
    m-xylene 507.03
    p-xylene 719.07
    chlorobenzene 759.23
    dimethyl carbonate 235.24
    n-octane 147.47
    formamide 35.36
    cyclopentanone 1741.41
    2-pentanone 825.44
    anisole 682.42
    cyclopentyl methyl ether 972.28
    gamma-butyrolactone 1194.64
    1-methoxy-2-propanol 214.92
    pyridine 1437.88
    3-pentanone 742.89
    furfural 649.14
    n-dodecane 92.96
    diethylene glycol 109.68
    diisopropyl ether 276.5
    tert-amyl alcohol 256.19
    acetylacetone 705.65
    n-hexadecane 112.16
    acetophenone 521.41
    methyl propionate 523.56
    isopentyl acetate 948.17
    trichloroethylene 1977.59
    n-nonanol 236.13
    cyclohexanol 293.14
    benzyl alcohol 295.57
    2-ethylhexanol 442.08
    isooctanol 193.85
    dipropyl ether 1077.56
    1,2-dichlorobenzene 575.89
    ethyl lactate 124.51
    propylene carbonate 587.9
    n-methylformamide 226.19
    2-pentanol 191.66
    n-pentane 167.33
    1-propoxy-2-propanol 385.48
    1-methoxy-2-propyl acetate 603.56
    2-(2-methoxypropoxy) propanol 256.75
    mesitylene 302.39
    ε-caprolactone 881.32
    p-cymene 414.7
    epichlorohydrin 1431.81
    1,1,1-trichloroethane 1039.24
    2-aminoethanol 37.07
    morpholine-4-carbaldehyde 740.95
    sulfolane 770.81
    2,2,4-trimethylpentane 80.07
    2-methyltetrahydrofuran 1601.8
    n-hexyl acetate 649.86
    isooctane 66.31
    2-(2-butoxyethoxy)ethanol 308.0
    sec-butyl acetate 382.87
    tert-butyl acetate 472.21
    decalin 183.61
    glycerin 29.39
    diglyme 734.74
    acrylic acid 97.74
    isopropyl myristate 316.49
    n-butyric acid 276.59
    acetyl acetate 365.58
    di(2-ethylhexyl) phthalate 206.16
    ethyl propionate 469.91
    nitromethane 286.91
    1,2-diethoxyethane 807.1
    benzonitrile 470.99
    trioctyl phosphate 167.0
    1-bromopropane 1008.75
    gamma-valerolactone 1235.28
    n-decanol 192.78
    triethyl phosphate 230.29
    4-methyl-2-pentanol 132.93
    propionitrile 382.95
    vinylene carbonate 477.92
    1,1,2-trichlorotrifluoroethane 280.27
    DMS 442.99
    cumene 346.13
    2-octanol 195.97
    2-hexanone 652.7
    octyl acetate 375.97
    limonene 531.29
    1,2-dimethoxyethane 840.25
    ethyl orthosilicate 236.06
    tributyl phosphate 193.69
    diacetone alcohol 280.45
    N,N-dimethylaniline 466.85
    acrylonitrile 344.46
    aniline 420.11
    1,3-propanediol 81.48
    bromobenzene 1011.79
    dibromomethane 1430.57
    1,1,2,2-tetrachloroethane 1179.16
    2-methyl-cyclohexyl acetate 505.05
    tetrabutyl urea 293.26
    diisobutyl methanol 235.92
    2-phenylethanol 445.37
    styrene 642.11
    dioctyl adipate 375.37
    dimethyl sulfate 248.98
    ethyl butyrate 784.27
    methyl lactate 99.37
    butyl lactate 201.61
    diethyl carbonate 426.87
    propanediol butyl ether 147.89
    triethyl orthoformate 432.88
    p-tert-butyltoluene 385.87
    methyl 4-tert-butylbenzoate 379.47
    morpholine 1264.33
    tert-butylamine 213.44
    n-dodecanol 165.68
    dimethoxymethane 695.4
    ethylene carbonate 436.78
    cyrene 270.4
    2-ethoxyethyl acetate 570.02
    2-ethylhexyl acetate 879.34
    1,2,4-trichlorobenzene 603.65
    4-methylpyridine 1307.98
    dibutyl ether 679.79
    2,6-dimethyl-4-heptanol 235.92
    DEF 731.94
    dimethyl isosorbide 613.31
    tetrachloroethylene 683.56
    eugenol 292.92
    triacetin 373.17
    span 80 246.44
    1,4-butanediol 41.61
    1,1-dichloroethane 1082.53
    2-methyl-1-pentanol 226.04
    methyl formate 220.69
    2-methyl-1-butanol 215.14
    n-decane 163.1
    butyronitrile 495.37
    3,7-dimethyl-1-octanol 233.58
    1-chlorooctane 399.22
    1-chlorotetradecane 174.59
    n-nonane 174.58
    undecane 118.37
    tert-butylcyclohexane 169.16
    cyclooctane 152.12
    cyclopentanol 340.96
    tetrahydropyran 1789.31
    tert-amyl methyl ether 471.14
    2,5,8-trioxanonane 448.24
    1-hexene 691.68
    2-isopropoxyethanol 190.81
    2,2,2-trifluoroethanol 34.41
    methyl butyrate 619.21

    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
Cedrela odorata Cedrela odorata L., fam. Meliaceae 0.16%
Clary sage leaf 8016-63-5 Salvia sclarea L., fam. Lamiaceae (Labiatae) 0.01%
Cinnamomum parthenoxylon (Vietnam) 1a Cinnamomum parthenoxylon (Jack) Nees, fam. Lauraceae 1.3%
Eugenia banderensis leaf (Cuba) Eugenia banderensis Urb., fam. Myrtaceae 4.54%
Boldo leaf (Chile) Boldea fragrans Juss. (Peumus boldus Mol.) 8.8%
Solidago gigantea Solidago gigantea Ait., fam. Asteraceae (Compositae) 0.6%