Hydroxyethyl-p-phenylenediamine sulfate

Overview IFRA Request a quote

  • Identifiers

    CAS number
    93841-25-9

    Molecular formula
    C8H14N2O5S

    SMILES
    C1=CC(=C(C=C1N)CCO)N.OS(=O)(=O)O

    Safety labels

    Acute Toxic
    Acute Toxic

    Irritant
    Irritant

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Sweet 35.38%
    Animal 32.82%
    Grape 30.59%
    Odorless 30.52%
    Fishy 29.23%
    Cheesy 29.14%
    Meaty 28.53%
    Floral 26.68%
    Ripe 26.05%
    Burnt 23.28%

     

    Flavor
    Fruity 48.37%
    Sweet 46.95%
    Mild 43.84%
    Bitter 41.92%
    Floral 38.88%
    Meaty 26.03%
    Odorless 25.53%
    Sulfurous 23.95%
    Powdery 22.31%
    Orange flower 22.0%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    4.25 (weak acid)

    Molecular weight
    250.27 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    384°C

    Flash point

    • 192.25 ˚C est.

  • Synonyms

    • 93841-25-9
    • COLOREX 25DAPE
    • benzeneethanol, 2,5-diamino-, sulfate (1:1) (salt)
    • 2-(2,5-DIAMINOPHENYL)ETHANOL SULFATE (1:1)
    • BENZENEETHANOL, 2,5-DIAMINO-, SULFATE (1:1)
    • RefChem:789478
    • HYDROXYETHYL-P-PHENYLENEDIAMINE SULFATE [INCI]
    • 3-(2-Hydroxyethyl)-p-phenylenediammonium sulphate
    • EINECS 298-995-1
    • Hydroxyethyl-p-phenylenediamine sulfate
    • L8W90PN89R
    • 2-(2,5-Diaminophenyl)ethanol sulfate
    • 2-(2-Hydroxy)ethyl-p-phenylene diamino sulfate
    • MFCD08458357
    • Hydroxyethyl-p-phenylenediamine sulphate
    • 2-(2,5-diaminophenyl)ethan-1-ol; sulfuric acid
    • Benzeneethanol, 2,5-diamino-, sulfate (1:1) (salt) (9CI); 2-(2,5-Diaminophenyl)ethanol sulfate (1:1)
    • 2-(2,5-Diaminophenyl)ethanolsulfate
    • SCHEMBL672183
    • SCHEMBL29836019
    • DTXSID90879808
    • VBSLNFWECRRALP-UHFFFAOYSA-N
    • AKOS015897347
    • AC-8153
    • CS-W005418
    • DS-2057
    • 2-(2,5-diaminophenyl)ethanol;sulfuric acid
    • 841H259
    • Q27282848
    • [4-azaniumyl-2-(2-hydroxyethyl)phenyl]ammonium;sulfate
    • Sulfuric acid--2-(2,5-diaminophenyl)ethan-1-ol (1/1)
    • 93841-25-9

  • Applications

    Hydroxyethyl-p-phenylenediamine sulfate (CAS 93841-25-9) is commonly used as a color intermediate in oxidative hair dye formulations for cosmetics, and as a precursor for textile dyes and pigments. It is also used as a colorant precursor for coatings and plastics, and may be employed for colorant applications in inks and other industrial polymer systems.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 5.47
    methanol 16.83
    isopropanol 2.43
    water 18.63
    ethyl acetate 3.94
    n-propanol 3.46
    acetone 6.79
    n-butanol 2.9
    acetonitrile 7.24
    DMF 54.02
    toluene 1.04
    isobutanol 2.24
    1,4-dioxane 17.94
    methyl acetate 3.7
    THF 38.08
    2-butanone 3.51
    n-pentanol 2.5
    sec-butanol 1.67
    n-hexane 0.08
    ethylene glycol 16.47
    NMP 54.76
    cyclohexane 0.19
    DMSO 140.21
    n-butyl acetate 3.13
    n-octanol 2.67
    chloroform 2.29
    n-propyl acetate 2.32
    acetic acid 43.92
    dichloromethane 2.59
    cyclohexanone 11.67
    propylene glycol 8.61
    isopropyl acetate 2.2
    DMAc 53.06
    2-ethoxyethanol 18.54
    isopentanol 2.85
    n-heptane 0.45
    ethyl formate 7.86
    1,2-dichloroethane 1.8
    n-hexanol 6.03
    2-methoxyethanol 39.05
    isobutyl acetate 1.69
    tetrachloromethane 1.62
    n-pentyl acetate 2.39
    transcutol 14.24
    n-heptanol 4.94
    ethylbenzene 0.72
    MIBK 2.78
    2-propoxyethanol 23.92
    tert-butanol 5.12
    MTBE 1.43
    2-butoxyethanol 13.75
    propionic acid 10.68
    o-xylene 1.67
    formic acid 79.73
    diethyl ether 1.13
    m-xylene 1.61
    p-xylene 1.03
    chlorobenzene 1.84
    dimethyl carbonate 6.27
    n-octane 0.22
    formamide 62.18
    cyclopentanone 28.51
    2-pentanone 3.23
    anisole 3.07
    cyclopentyl methyl ether 6.99
    gamma-butyrolactone 46.88
    1-methoxy-2-propanol 18.34
    pyridine 7.43
    3-pentanone 2.58
    furfural 45.9
    n-dodecane 0.18
    diethylene glycol 39.64
    diisopropyl ether 0.55
    tert-amyl alcohol 3.07
    acetylacetone 9.19
    n-hexadecane 0.2
    acetophenone 5.49
    methyl propionate 5.51
    isopentyl acetate 3.08
    trichloroethylene 4.42
    n-nonanol 2.66
    cyclohexanol 3.4
    benzyl alcohol 5.84
    2-ethylhexanol 3.6
    isooctanol 3.87
    dipropyl ether 3.12
    1,2-dichlorobenzene 2.62
    ethyl lactate 5.88
    propylene carbonate 17.42
    n-methylformamide 30.72
    2-pentanol 1.24
    n-pentane 0.07
    1-propoxy-2-propanol 11.23
    1-methoxy-2-propyl acetate 7.25
    2-(2-methoxypropoxy) propanol 10.34
    mesitylene 1.27
    ε-caprolactone 12.12
    p-cymene 1.74
    epichlorohydrin 20.89
    1,1,1-trichloroethane 2.28
    2-aminoethanol 16.77
    morpholine-4-carbaldehyde 50.33
    sulfolane 72.06
    2,2,4-trimethylpentane 0.12
    2-methyltetrahydrofuran 9.27
    n-hexyl acetate 2.95
    isooctane 0.12
    2-(2-butoxyethoxy)ethanol 12.66
    sec-butyl acetate 1.42
    tert-butyl acetate 3.38
    decalin 0.22
    glycerin 37.64
    diglyme 24.24
    acrylic acid 16.86
    isopropyl myristate 1.44
    n-butyric acid 12.86
    acetyl acetate 4.91
    di(2-ethylhexyl) phthalate 4.1
    ethyl propionate 2.74
    nitromethane 62.1
    1,2-diethoxyethane 3.25
    benzonitrile 4.88
    trioctyl phosphate 3.16
    1-bromopropane 0.57
    gamma-valerolactone 43.82
    n-decanol 2.03
    triethyl phosphate 3.86
    4-methyl-2-pentanol 1.4
    propionitrile 3.28
    vinylene carbonate 15.55
    1,1,2-trichlorotrifluoroethane 37.25
    DMS 3.9
    cumene 0.89
    2-octanol 1.97
    2-hexanone 2.39
    octyl acetate 2.38
    limonene 2.1
    1,2-dimethoxyethane 20.31
    ethyl orthosilicate 3.48
    tributyl phosphate 2.59
    diacetone alcohol 10.09
    N,N-dimethylaniline 3.58
    acrylonitrile 7.48
    aniline 3.86
    1,3-propanediol 18.26
    bromobenzene 1.38
    dibromomethane 1.25
    1,1,2,2-tetrachloroethane 4.26
    2-methyl-cyclohexyl acetate 4.43
    tetrabutyl urea 4.5
    diisobutyl methanol 2.0
    2-phenylethanol 7.63
    styrene 0.67
    dioctyl adipate 3.15
    dimethyl sulfate 19.78
    ethyl butyrate 3.65
    methyl lactate 12.71
    butyl lactate 4.67
    diethyl carbonate 2.85
    propanediol butyl ether 8.2
    triethyl orthoformate 3.63
    p-tert-butyltoluene 1.62
    methyl 4-tert-butylbenzoate 9.54
    morpholine 16.29
    tert-butylamine 1.54
    n-dodecanol 1.53
    dimethoxymethane 17.06
    ethylene carbonate 11.28
    cyrene 21.79
    2-ethoxyethyl acetate 4.26
    2-ethylhexyl acetate 2.38
    1,2,4-trichlorobenzene 3.65
    4-methylpyridine 5.43
    dibutyl ether 1.27
    2,6-dimethyl-4-heptanol 2.0
    DEF 9.42
    dimethyl isosorbide 20.36
    tetrachloroethylene 4.36
    eugenol 10.91
    triacetin 5.77
    span 80 9.94
    1,4-butanediol 8.49
    1,1-dichloroethane 1.05
    2-methyl-1-pentanol 2.5
    methyl formate 25.12
    2-methyl-1-butanol 2.52
    n-decane 0.27
    butyronitrile 3.18
    3,7-dimethyl-1-octanol 2.22
    1-chlorooctane 0.89
    1-chlorotetradecane 0.48
    n-nonane 0.23
    undecane 0.22
    tert-butylcyclohexane 0.2
    cyclooctane 0.16
    cyclopentanol 6.6
    tetrahydropyran 4.48
    tert-amyl methyl ether 1.58
    2,5,8-trioxanonane 21.01
    1-hexene 0.25
    2-isopropoxyethanol 9.11
    2,2,2-trifluoroethanol 27.03
    methyl butyrate 4.07

    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