1,4-Diaminobenzene dihydrochloride

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  • Identifiers

    CAS number
    624-18-0

    Molecular formula
    C6H10Cl2N2

    SMILES
    C1=CC(=CC=C1N)N.Cl.Cl

    Safety labels

    Acute Toxic
    Acute Toxic

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Animal 39.89%
    Sweet 39.74%
    Fishy 36.58%
    Meaty 34.23%
    Cheesy 33.42%
    Burnt 32.3%
    Phenolic 31.93%
    Floral 29.88%
    Ripe 28.45%
    Musty 27.21%

     

    Flavor
    Sulfurous 34.88%
    Meaty 30.86%
    Garlic 30.07%
    Fishy 28.37%
    Egg 27.38%
    Phenolic 26.94%
    Onion 25.98%
    Penetrating 23.67%
    Mild 22.67%
    Medicinal 21.53%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    4.3 (weak acid)

    Molecular weight
    181.06 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    281°C

    Melting point expt.

    • greater than 392 °F (NTP, 1992)
    • 275 °C

    Flash point

    • 144.6 ˚C est.

    Solubility expt.

    • greater than or equal to 100 mg/mL at 70 °F (NTP, 1992)
    • FREELY SOL IN WATER; SLIGHTLY SOL IN ALC, ETHER
    • Solubility in water: very good

  • Synonyms

    • 624-18-0
    • p-Phenylenediamine dihydrochloride
    • 1,4-Phenylenediamine dihydrochloride
    • benzene-1,4-diamine dihydrochloride
    • 1,4-DIAMINOBENZENE DIHYDROCHLORIDE
    • Fourrine DS
    • Pelagol Grey CD
    • Durafur Black RC
    • Fourrine 64
    • p-PD HCl
    • p-Phenylenediamine HCl
    • Pelagol CD
    • 1,4-Benzenediamine dihydrochloride
    • 1,4-Benzenediamine, dihydrochloride
    • p-Pda HCl
    • Oxidation Base 10A
    • C.I. Oxidation Base 10A
    • 4-Aminoaniline dihydrochloride
    • p-Benzenediamine dihydrochloride
    • p-Diaminobenzene dihydrochloride
    • CI Oxidation Base 10A
    • NCI-C03930
    • p-Phenylenediamine, dihydrochloride
    • p-Aminoaniline dihydrochloride
    • CCRIS 510
    • Phenylenediamine dihydrochloride
    • HSDB 5436
    • CI 76061
    • C.I. 76061
    • EINECS 210-834-9
    • 1,4-Phenylenediamine 2-hydrochloride
    • NSC 112725
    • DTXSID8021141
    • 1,4-Benzenediamine hydrochloride
    • RODOL DC
    • 1,4-Phenylenediamine hydrochloride
    • GL418131I1
    • 1,4-Benzenediamine, hydrochloride (1:2)
    • DTXCID901141
    • NSC-112725
    • 1,4-DIAMINOBENZENE DIHYDROCHLORIDE [HSDB]
    • pPD HCl
    • pPDA HCl
    • pPhenylenediamine HCl
    • RefChem:416658
    • pAminoaniline dihydrochloride
    • 4Aminoaniline dihydrochloride
    • pBenzenediamine dihydrochloride
    • pDiaminobenzene dihydrochloride
    • pPhenylenediamine hydrochloride
    • pPhenylenediamine dihydrochloride
    • paraPhenylenediamine hydrochloride
    • 1,4Benzenediamine dihydrochloride
    • 1,4Phenylenediamine 2hydrochloride
    • 1,4Phenylenediamine dihydrochloride
    • P-PHENYLENEDIAMINE HCL [INCI]
    • 1,4-PHENYLENEDIAMMONIUM DICHLORIDE
    • 210-834-9
    • p-Phenylenediamine.2HCl
    • MFCD00013002
    • benzene-1,4-diamine;dihydrochloride
    • p-Phenylenediamine 2HCl
    • UNII-GL418131I1
    • SCHEMBL378591
    • 1,4-Phenyldiamine hydrochloride
    • CHEMBL3561416
    • AAA62418
    • paraphenylene diamine dihydrochloride
    • Tox21_303880
    • AKOS016008571
    • NCGC00357140-01
    • AS-12683
    • CAS-624-18-0
    • DB-073115
    • NS00080357
    • P0152
    • Benzene-1,4-diamine--hydrogen chloride (1/2)
    • 1,4-Phenylenediamine dihydrochloride, >=99.0%
    • EN300-1655031
    • F165600
    • Q3318029
    • 624-18-0

  • Applications

    1,4-Diaminobenzene dihydrochloride is primarily used as a chemical intermediate and dye precursor in industrial manufacturing. It is employed to synthesize azo dyes and pigments for textiles, plastics, coatings and printing inks; it also serves as a colorant intermediate in cosmetics and personal care formulations, notably as a hair dye precursor. In polymer and coating formulations, it functions as a building block for aromatic polymer networks and can act as a crosslinking component in coatings and adhesives. Additionally, it is used as a starting material for the synthesis of specialty polymers and related materials in industrial manufacturing.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 22.96
    methanol 61.84
    isopropanol 11.72
    water 7.17
    ethyl acetate 29.19
    n-propanol 15.43
    acetone 58.03
    n-butanol 13.15
    acetonitrile 33.57
    DMF 179.37
    toluene 1.68
    isobutanol 7.38
    1,4-dioxane 25.8
    methyl acetate 39.98
    THF 112.06
    2-butanone 33.43
    n-pentanol 8.91
    sec-butanol 7.13
    n-hexane 0.42
    ethylene glycol 16.8
    NMP 76.33
    cyclohexane 0.29
    DMSO 140.78
    n-butyl acetate 19.96
    n-octanol 6.72
    chloroform 27.26
    n-propyl acetate 15.49
    acetic acid 43.44
    dichloromethane 14.24
    cyclohexanone 22.94
    propylene glycol 14.29
    isopropyl acetate 12.65
    DMAc 144.1
    2-ethoxyethanol 34.82
    isopentanol 8.75
    n-heptane 1.25
    ethyl formate 43.64
    1,2-dichloroethane 10.55
    n-hexanol 17.29
    2-methoxyethanol 72.59
    isobutyl acetate 7.95
    tetrachloromethane 9.61
    n-pentyl acetate 11.05
    transcutol 23.66
    n-heptanol 12.44
    ethylbenzene 1.52
    MIBK 10.57
    2-propoxyethanol 53.24
    tert-butanol 14.2
    MTBE 9.23
    2-butoxyethanol 33.7
    propionic acid 27.8
    o-xylene 2.01
    formic acid 58.46
    diethyl ether 7.99
    m-xylene 2.04
    p-xylene 2.54
    chlorobenzene 6.24
    dimethyl carbonate 36.95
    n-octane 0.53
    formamide 74.89
    cyclopentanone 81.73
    2-pentanone 21.17
    anisole 11.44
    cyclopentyl methyl ether 15.74
    gamma-butyrolactone 109.65
    1-methoxy-2-propanol 44.21
    pyridine 22.44
    3-pentanone 15.05
    furfural 91.39
    n-dodecane 0.44
    diethylene glycol 45.16
    diisopropyl ether 2.05
    tert-amyl alcohol 9.55
    acetylacetone 35.1
    n-hexadecane 0.46
    acetophenone 13.63
    methyl propionate 32.84
    isopentyl acetate 13.65
    trichloroethylene 30.77
    n-nonanol 6.6
    cyclohexanol 4.14
    benzyl alcohol 9.59
    2-ethylhexanol 8.97
    isooctanol 7.83
    dipropyl ether 11.09
    1,2-dichlorobenzene 8.42
    ethyl lactate 16.28
    propylene carbonate 46.86
    n-methylformamide 103.39
    2-pentanol 5.15
    n-pentane 0.32
    1-propoxy-2-propanol 29.71
    1-methoxy-2-propyl acetate 25.79
    2-(2-methoxypropoxy) propanol 16.61
    mesitylene 1.58
    ε-caprolactone 23.59
    p-cymene 3.69
    epichlorohydrin 60.67
    1,1,1-trichloroethane 17.04
    2-aminoethanol 23.73
    morpholine-4-carbaldehyde 65.33
    sulfolane 89.61
    2,2,4-trimethylpentane 0.4
    2-methyltetrahydrofuran 25.58
    n-hexyl acetate 10.54
    isooctane 0.33
    2-(2-butoxyethoxy)ethanol 21.79
    sec-butyl acetate 7.05
    tert-butyl acetate 13.94
    decalin 0.37
    glycerin 37.64
    diglyme 48.05
    acrylic acid 31.82
    isopropyl myristate 4.61
    n-butyric acid 34.85
    acetyl acetate 23.22
    di(2-ethylhexyl) phthalate 7.09
    ethyl propionate 15.8
    nitromethane 154.87
    1,2-diethoxyethane 10.73
    benzonitrile 12.8
    trioctyl phosphate 6.3
    1-bromopropane 3.93
    gamma-valerolactone 84.08
    n-decanol 4.98
    triethyl phosphate 10.3
    4-methyl-2-pentanol 4.14
    propionitrile 21.32
    vinylene carbonate 43.76
    1,1,2-trichlorotrifluoroethane 64.07
    DMS 12.17
    cumene 1.81
    2-octanol 5.28
    2-hexanone 14.6
    octyl acetate 7.68
    limonene 4.22
    1,2-dimethoxyethane 59.71
    ethyl orthosilicate 9.33
    tributyl phosphate 6.44
    diacetone alcohol 21.9
    N,N-dimethylaniline 8.84
    acrylonitrile 38.86
    aniline 6.9
    1,3-propanediol 30.46
    bromobenzene 4.57
    dibromomethane 7.57
    1,1,2,2-tetrachloroethane 25.94
    2-methyl-cyclohexyl acetate 10.63
    tetrabutyl urea 10.0
    diisobutyl methanol 4.74
    2-phenylethanol 14.58
    styrene 1.85
    dioctyl adipate 6.59
    dimethyl sulfate 64.68
    ethyl butyrate 16.38
    methyl lactate 34.08
    butyl lactate 12.08
    diethyl carbonate 12.28
    propanediol butyl ether 14.84
    triethyl orthoformate 12.94
    p-tert-butyltoluene 3.86
    methyl 4-tert-butylbenzoate 18.05
    morpholine 30.48
    tert-butylamine 5.96
    n-dodecanol 3.71
    dimethoxymethane 68.53
    ethylene carbonate 31.89
    cyrene 20.76
    2-ethoxyethyl acetate 15.49
    2-ethylhexyl acetate 10.41
    1,2,4-trichlorobenzene 10.24
    4-methylpyridine 16.96
    dibutyl ether 4.68
    2,6-dimethyl-4-heptanol 4.74
    DEF 30.18
    dimethyl isosorbide 34.55
    tetrachloroethylene 20.93
    eugenol 19.83
    triacetin 12.41
    span 80 13.71
    1,4-butanediol 10.97
    1,1-dichloroethane 10.78
    2-methyl-1-pentanol 6.28
    methyl formate 94.18
    2-methyl-1-butanol 6.95
    n-decane 0.64
    butyronitrile 17.93
    3,7-dimethyl-1-octanol 5.15
    1-chlorooctane 3.03
    1-chlorotetradecane 1.34
    n-nonane 0.54
    undecane 0.5
    tert-butylcyclohexane 0.54
    cyclooctane 0.21
    cyclopentanol 10.41
    tetrahydropyran 12.98
    tert-amyl methyl ether 7.04
    2,5,8-trioxanonane 32.53
    1-hexene 1.59
    2-isopropoxyethanol 15.95
    2,2,2-trifluoroethanol 37.46
    methyl butyrate 23.76

    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