1-Naphthol

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  • Identifiers

    CAS number
    90-15-3

    Molecular formula
    C10H8O

    SMILES
    C1=CC=C2C(=C1)C=CC=C2O

    Safety labels

    Corrosive
    Corrosive

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Phenolic 85.9%
    Medicinal 65.17%
    Animal 42.66%
    Smoky 41.8%
    Leathery 39.14%
    Spicy 37.86%
    Burnt 34.69%
    Musty 33.03%
    Woody 32.18%
    Sweet 29.47%

     

    Flavor
    Phenolic 68.96%
    Medicinal 49.36%
    Phenol 38.75%
    Plastic 35.02%
    Fecal 34.91%
    Medical 32.42%
    Smoke 30.69%
    Geranium 30.62%
    Animal 29.37%
    Naphthyl 29.08%

     

    Odor impact est.
    Medium

    Odor threshold

    • Recognition: 0.0030-0.0052 mg/cu m

  • Properties

    XLogP3-AA
    2.8

    pKa est.
    9.3 (weak base)

    Molecular weight
    144.17 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Very slow

    Melting point expt.

    • 96 °C
    • 94.00 to 95.00 °C. @ 760.00 mm Hg

    Boiling point

    • 288 °C
    • 279.00 to 280.00 °C. @ 760.00 mm Hg

    Flash point

    • 139.2 ˚C est.
    • 153 °C (open cup)

    Solubility expt.

    • In water, 866 mg/L at 25 °C
    • Very soluble in ethanol and ether, soluble in acetone
    • Freely soluble in benzene, chloroform and alkali hydroxide solutions
    • 866 mg/L @ 24C (exp)

  • Synonyms

    • 1-NAPHTHOL
    • 90-15-3
    • naphthalen-1-ol
    • alpha-naphthol
    • 1-Naphthalenol
    • 1-Hydroxynaphthalene
    • NAPHTHOL
    • Furro ER
    • Fouramine ERN
    • Fourrine ERN
    • Tertral ERN
    • Basf Ursol ERN
    • Ursol ERN
    • Fourrine 99
    • Nako TRB
    • Zoba ERN
    • Durafur developer D
    • alpha-Hydroxynaphthalene
    • Naphthalenol
    • .alpha.-Naphthol
    • C.I. Oxidation Base 33
    • 1321-67-1
    • 1-Naphthyl alcohol
    • a-naphthol
    • NSC 9586
    • CI Oxidation Base 33
    • Naphthol-1
    • CCRIS 1172
    • Naphthyl-1-ol
    • C.I. 76605
    • .alpha.-Hydroxynaphthalene
    • HSDB 2650
    • Naphthol, 1-
    • EINECS 201-969-4
    • alpha-Naphthyl alcohol
    • CHEBI:10319
    • CI 76605
    • 1-napthol
    • AI3-00106
    • MFCD00003930
    • UNII-2A71EAQ389
    • DTXSID6021793
    • 2A71EAQ389
    • NSC-9586
    • 1-NAPHTOL-
    • 1-NAPHTHOL [MI]
    • 1-NAPHTHOL [HSDB]
    • DULOXETINE IMPURITY D
    • WLN: L66J BQ
    • CHEMBL122617
    • DTXCID401793
    • SGCUT00118
    • NSC9586
    • to_000072
    • DULOXETINE IMPURITY D [USP IMPURITY]
    • C11714
    • AB-131/40232333
    • DULOXETINE HYDROCHLORIDE IMPURITY D [EP IMPURITY]
    • hydroxynaphthalene
    • CAS-90-15-3
    • DULOXETINE IMPURITY D (USP IMPURITY)
    • DULOXETINE HYDROCHLORIDE IMPURITY D (EP IMPURITY)
    • alphanaphthol
    • napthalenol
    • alpha-napthol
    • napthyl alcohol
    • 1Naphthalenol
    • 1-Naphtyol
    • naphthalene-1-ol
    • Naphthol 1
    • 1-Naphtol
    • 8 -naphthol
    • 1hydroxynaphthalene
    • hydroxy naphthalene
    • (+)-naphthol
    • 1NP
    • nchembio791-comp4
    • 1-Naphthol, Reagent
    • alphaHydroxynaphthalene
    • 1-Naphthol, Purified
    • Naphth-1-ol, 9
    • LS-95401
    • 1-Naphthol (Standard)
    • SCHEMBL3416
    • 1-NAPHTHOL [INCI]
    • alpha-Naphthol, 1-Naphthol
    • 33420_RIEDEL
    • 35825_RIEDEL
    • N1000_SIAL
    • N2780_SIAL
    • 1-Naphthol, Pure PA, 99%
    • 1-Naphthol, LR, >=99%
    • 70438_FLUKA
    • 70442_FLUKA
    • BDBM23450
    • HY-Y1309R
    • 1-Naphthol, BioXtra, >=99%
    • 4b33
    • 1-Naphthol, p.a., 99.0%
    • HY-Y1309
    • Tox21_202120
    • Tox21_302768
    • 1-Naphthol, >=98.0% (GC)
    • BBL011611
    • MSK000684
    • STL163337
    • ZINC00967929
    • AKOS000118822
    • CS-W020125
    • FN07835
    • GS-6917
    • 1-Naphthol, ReagentPlus(R), >=99%
    • Duloxetine EP Impurity D (1-Naphthol)
    • NCGC00249169-01
    • NCGC00256563-01
    • NCGC00259669-01
    • DB-259778
    • ST5214429
    • 1-Naphthol, SAJ special grade, >=99.0%
    • 1-Naphthol, Vetec(TM) reagent grade, 98%
    • N0026
    • N0864
    • NS00005331
    • EN300-19501
    • 1-Naphthol, PESTANAL(R), analytical standard
    • Q408876
    • 1-Naphthol, certified reference material, TraceCERT(R)
    • 1-Naphthol, puriss., for fluorescence, >=99.0% (GC)

  • Applications

    1-Naphthol (CAS 90-15-3) is primarily used as a chemical intermediate in the synthesis of azo dyes and pigment precursors for textiles and printing inks; it also serves as a building block for naphthol-based colorants used in coatings, inks, and plastics. In polymer and plastics formulations, it provides colorant functionality and supports pigment dispersion in diverse formulations. It further functions as a starting material for other organic syntheses in industrial manufacturing, including the preparation of specialty dyes and related colorant additives. Use is governed by formulation requirements and local regulations, and the compound is typically handled as an intermediate rather than a finished consumer product.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 589.5
    methanol 548.4
    isopropanol 437.48
    water 1.55
    ethyl acetate 844.7
    n-propanol 459.98
    acetone 1504.6
    n-butanol 392.33
    acetonitrile 989.78
    DMF 1448.42
    toluene 234.35
    isobutanol 308.97
    1,4-dioxane 4113.82
    methyl acetate 890.26
    THF 3127.09
    2-butanone 985.6
    n-pentanol 303.07
    sec-butanol 284.53
    n-hexane 110.34
    ethylene glycol 73.2
    NMP 855.41
    cyclohexane 78.42
    DMSO 2172.98
    n-butyl acetate 743.76
    n-octanol 214.86
    chloroform 1059.17
    n-propyl acetate 745.02
    acetic acid 403.91
    dichloromethane 1173.81
    cyclohexanone 1097.75
    propylene glycol 54.4
    isopropyl acetate 438.39
    DMAc 491.02
    2-ethoxyethanol 524.01
    isopentanol 286.99
    n-heptane 74.27
    ethyl formate 543.88
    1,2-dichloroethane 1249.84
    n-hexanol 383.22
    2-methoxyethanol 761.81
    isobutyl acetate 435.72
    tetrachloromethane 181.14
    n-pentyl acetate 364.3
    transcutol 1415.77
    n-heptanol 201.36
    ethylbenzene 184.48
    MIBK 407.1
    2-propoxyethanol 755.29
    tert-butanol 398.89
    MTBE 508.36
    2-butoxyethanol 399.46
    propionic acid 386.3
    o-xylene 118.26
    formic acid 102.15
    diethyl ether 1187.3
    m-xylene 153.81
    p-xylene 199.57
    chlorobenzene 298.56
    dimethyl carbonate 312.1
    n-octane 46.96
    formamide 353.35
    cyclopentanone 1625.88
    2-pentanone 779.58
    anisole 474.97
    cyclopentyl methyl ether 884.01
    gamma-butyrolactone 1795.57
    1-methoxy-2-propanol 489.98
    pyridine 1140.11
    3-pentanone 538.36
    furfural 788.31
    n-dodecane 33.51
    diethylene glycol 398.65
    diisopropyl ether 228.53
    tert-amyl alcohol 253.47
    acetylacetone 750.34
    n-hexadecane 39.51
    acetophenone 324.87
    methyl propionate 599.63
    isopentyl acetate 476.0
    trichloroethylene 1474.7
    n-nonanol 185.3
    cyclohexanol 299.35
    benzyl alcohol 219.45
    2-ethylhexanol 222.65
    isooctanol 160.68
    dipropyl ether 490.59
    1,2-dichlorobenzene 231.18
    ethyl lactate 177.85
    propylene carbonate 654.63
    n-methylformamide 771.72
    2-pentanol 258.83
    n-pentane 61.77
    1-propoxy-2-propanol 459.65
    1-methoxy-2-propyl acetate 449.69
    2-(2-methoxypropoxy) propanol 254.38
    mesitylene 107.32
    ε-caprolactone 951.76
    p-cymene 86.67
    epichlorohydrin 2417.07
    1,1,1-trichloroethane 668.96
    2-aminoethanol 153.61
    morpholine-4-carbaldehyde 1313.73
    sulfolane 1524.53
    2,2,4-trimethylpentane 25.85
    2-methyltetrahydrofuran 1660.73
    n-hexyl acetate 498.62
    isooctane 32.75
    2-(2-butoxyethoxy)ethanol 478.94
    sec-butyl acetate 385.54
    tert-butyl acetate 421.3
    decalin 51.57
    glycerin 107.39
    diglyme 1025.79
    acrylic acid 272.7
    isopropyl myristate 178.7
    n-butyric acid 469.03
    acetyl acetate 351.35
    di(2-ethylhexyl) phthalate 92.93
    ethyl propionate 518.13
    nitromethane 1447.51
    1,2-diethoxyethane 797.26
    benzonitrile 331.45
    trioctyl phosphate 100.94
    1-bromopropane 564.25
    gamma-valerolactone 1809.59
    n-decanol 141.51
    triethyl phosphate 133.43
    4-methyl-2-pentanol 148.51
    propionitrile 630.57
    vinylene carbonate 565.36
    1,1,2-trichlorotrifluoroethane 505.53
    DMS 384.51
    cumene 113.95
    2-octanol 159.9
    2-hexanone 704.14
    octyl acetate 220.54
    limonene 125.71
    1,2-dimethoxyethane 1428.51
    ethyl orthosilicate 128.17
    tributyl phosphate 118.71
    diacetone alcohol 393.52
    N,N-dimethylaniline 236.93
    acrylonitrile 695.88
    aniline 248.83
    1,3-propanediol 321.18
    bromobenzene 291.21
    dibromomethane 780.01
    1,1,2,2-tetrachloroethane 949.94
    2-methyl-cyclohexyl acetate 240.07
    tetrabutyl urea 157.63
    diisobutyl methanol 134.98
    2-phenylethanol 259.17
    styrene 216.1
    dioctyl adipate 198.68
    dimethyl sulfate 421.44
    ethyl butyrate 444.57
    methyl lactate 175.07
    butyl lactate 191.8
    diethyl carbonate 243.56
    propanediol butyl ether 255.04
    triethyl orthoformate 225.39
    p-tert-butyltoluene 87.01
    methyl 4-tert-butylbenzoate 234.19
    morpholine 2956.3
    tert-butylamine 230.63
    n-dodecanol 112.52
    dimethoxymethane 1138.45
    ethylene carbonate 576.96
    cyrene 228.55
    2-ethoxyethyl acetate 471.83
    2-ethylhexyl acetate 378.18
    1,2,4-trichlorobenzene 266.16
    4-methylpyridine 831.91
    dibutyl ether 419.59
    2,6-dimethyl-4-heptanol 134.98
    DEF 711.84
    dimethyl isosorbide 482.93
    tetrachloroethylene 647.4
    eugenol 242.78
    triacetin 297.91
    span 80 221.72
    1,4-butanediol 125.44
    1,1-dichloroethane 889.52
    2-methyl-1-pentanol 211.43
    methyl formate 665.72
    2-methyl-1-butanol 246.9
    n-decane 58.29
    butyronitrile 589.67
    3,7-dimethyl-1-octanol 167.04
    1-chlorooctane 192.73
    1-chlorotetradecane 72.68
    n-nonane 60.93
    undecane 43.46
    tert-butylcyclohexane 54.0
    cyclooctane 36.25
    cyclopentanol 408.41
    tetrahydropyran 2271.09
    tert-amyl methyl ether 287.71
    2,5,8-trioxanonane 527.4
    1-hexene 317.3
    2-isopropoxyethanol 388.57
    2,2,2-trifluoroethanol 161.68
    methyl butyrate 684.48

    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