Hydrazine

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  • Identifiers

    CAS number
    302-01-2

    Molecular formula
    H4N2

    SMILES
    NN

    Safety labels

    Flammable
    Flammable

    Corrosive
    Corrosive

    Acute Toxic
    Acute Toxic

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Fishy 80.34%
    Cheesy 59.14%
    Odorless 54.12%
    Ripe 50.12%
    Pungent 18.17%
    Animal 17.0%
    Sulfurous 13.59%
    Meaty 13.14%
    Oily 13.09%
    Fermented 12.52%

     

    Flavor
    Fishy 38.3%
    Ammoniacal 33.77%
    Egg 31.46%
    Odorless 25.81%
    Rotten 24.3%
    Ammonia 23.72%
    Decomposing cabbage 21.42%
    Sulfur 20.8%
    Garlic 20.55%
    Formyl 18.9%

     

    Odor impact est.
    Low

    Odor threshold

    • Odor Threshold Low: 3.0 [mmHg]. Odor Threshold High: 4.0 [mmHg]. AIHA detection odor threshold AIHA (mean = 3.7 ppm)
    • Odor perception threshold for hydrazine is 160 mg/L.

  • Properties

    XLogP3-AA
    -1.5

    pKa est.
    4.55 (weak acid)

    Molecular weight
    32.046 g/mol

    Melting point expt.

    • 36 °F (EPA, 1998)
    • 1.54 °C
    • MP: 127 °C; soluble in water at 25 °C /Hydrazine monohydroiodide/
    • 2 °C
    • 36 °F

    Boiling point

    • 236.3 °F at 760 mmHg (EPA, 1998)
    • 113.55 °C
    • Contracts on freezing. ...One gallon of commercial product weighs 8.38 lbs. ...Dissolves many inorganic substances. ...Forms an azeotropic mixture with water, boiling point (at 760 mm Hg) 120.3 °C, which contains 55 mole-% (68.5 weight-%) N2H4.
    • BP: 56 °C at 71 mm Hg; 170 deg at 5 atm; 200 °C at 10 atm; 236 °C at 20 atm
    • 114 °C
    • 236.3 °F
    • 236 °F

    Flash point

    • 55.79 ˚C est.
    • 125.6 °F (EPA, 1998)
    • Emergency Response Guidebook is for "hydrazine, anhydrous." 100 °F
    • 52 °C (126 °F) - closed cup
    • 100 °F - open cup
    • 40 °C c.c.
    • 125.6 °F
    • 99 °F

    Solubility expt.

    • Miscible (NIOSH, 2024)
    • Miscible with water /1.0X10+6 mg/L/
    • Very soluble in water
    • Miscible with methyl, ethyl, propyl, isobutyl alcohols
    • Very soluble in ethanol, methanol
    • For more Solubility (Complete) data for Hydrazine (6 total), please visit the HSDB record page.
    • 1000 mg/mL
    • Solubility in water: miscible
    • Miscible

  • Synonyms

    • HYDRAZINE
    • 302-01-2
    • Diamine
    • Levoxine
    • Hydrazine base
    • Oxytreat 35
    • Hydrazin
    • Hydrazyna
    • Hydrazine, anhydrous
    • Nitrogen hydride
    • Hydrazines
    • Hydrazine (anhydrous)
    • Hydrazyna [Polish]
    • RCRA waste number U133
    • Hydrazine anhydrous
    • CCRIS 335
    • Amerzine
    • HSDB 544
    • N2H4
    • H2NNH2
    • UNII-27RFH0GB4R
    • EINECS 206-114-9
    • 27RFH0GB4R
    • CHEBI:15571
    • 119775-10-9
    • DTXSID3020702
    • H 70 (FUEL)
    • NITROGEN HYDRIDE (N2H4)
    • HYDRAZINE (IARC)
    • HYDRAZINE [IARC]
    • HDZ
    • ISONIAZID IMPURITY E (EP IMPURITY)
    • ISONIAZID IMPURITY E [EP IMPURITY]
    • ALLOPURINOL IMPURITY F (EP IMPURITY)
    • ALLOPURINOL IMPURITY F [EP IMPURITY]
    • UN2029
    • UN3293
    • Hydrazine/Hydrazine sulfate
    • RCRA waste no. U133
    • Hydrazine Standard: N2H4 @ 100 mg/L in 1% Acetic Acid
    • Hydrazine Standard: N2H4 @ 1000 mg/L in 1% Acetic Acid
    • Diamidogen
    • Hidrazine
    • amino nitrogen
    • Zerox
    • Hydrazine fume
    • (anhydrous)
    • Catalyzed hydrazine
    • Scav-Ox II
    • HYDRAZINE (HYDRAZINE SULFATE)
    • Zerox (Salt/Mix)
    • MFCD00011417
    • Amerzine (Salt/Mix)
    • Diamine, hydrazine base
    • HYDRAZINE [MI]
    • HYDRAZINE [HSDB]
    • NH2NH2
    • Scav-Ox II (Salt/Mix)
    • HYDRAZINE [WHO-DD]
    • Hydrazine, anhydrous, 98%
    • Nitrogen hydride, (N2H4)
    • NH2-NH2
    • UN 2029 (Salt/Mix)
    • UN 2030 (Salt/Mix)
    • DTXCID30702
    • Hydrazine (hydrazine sulphate)
    • HYDRAZINE, (ANHYDROUS)
    • Catalyzed hydrazine (Salt/Mix)
    • CHEMBL1237174
    • HYDRAZINE AQUEOUS SOLUTION
    • DTXSID70159610
    • CREXVNNSNOKDHW-UHFFFAOYSA-N
    • STL281862
    • AKOS000269060
    • NCGC00188947-01
    • BP-13613
    • DB-007559
    • H0172
    • H0204
    • H0697
    • NS00014234
    • C05361
    • Q58447
    • Q27110398
    • 206-114-9
    • HZN

  • Applications

    Hydrazine (CAS 302-01-2) is widely used as a strong reducing agent in organic synthesis, for example in nitro-to-amino reductions and in the formation of hydrazones; it is also a key precursor for hydrazide linkages in polymers and resins (notably polyimides and certain epoxy systems); in industrial water treatment, it is employed as an oxygen scavenger to control corrosion in boiler and cooling systems; and it is used as a rocket propellant (including monopropellant formulations) or as a precursor for propulsion-related chemical syntheses.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 22.36
    methanol 74.97
    isopropanol 6.38
    water 52.3
    ethyl acetate 1.52
    n-propanol 11.94
    acetone 2.58
    n-butanol 7.34
    acetonitrile 3.62
    DMF 23.67
    toluene 0.15
    isobutanol 4.73
    1,4-dioxane 3.53
    methyl acetate 2.6
    THF 5.64
    2-butanone 1.74
    n-pentanol 2.91
    sec-butanol 4.04
    n-hexane 0.12
    ethylene glycol 54.15
    NMP 31.0
    cyclohexane 0.28
    DMSO 54.66
    n-butyl acetate 2.24
    n-octanol 1.23
    chloroform 4.03
    n-propyl acetate 1.17
    acetic acid 87.51
    dichloromethane 4.81
    cyclohexanone 4.07
    propylene glycol 24.63
    isopropyl acetate 0.64
    DMAc 11.39
    2-ethoxyethanol 9.75
    isopentanol 2.52
    n-heptane 0.37
    ethyl formate 6.74
    1,2-dichloroethane 2.55
    n-hexanol 3.61
    2-methoxyethanol 33.36
    isobutyl acetate 0.51
    tetrachloromethane 1.35
    n-pentyl acetate 1.26
    transcutol 10.46
    n-heptanol 2.11
    ethylbenzene 0.1
    MIBK 0.35
    2-propoxyethanol 9.73
    tert-butanol 3.43
    MTBE 0.54
    2-butoxyethanol 6.49
    propionic acid 25.52
    o-xylene 0.18
    formic acid 184.64
    diethyl ether 0.7
    m-xylene 0.11
    p-xylene 0.16
    chlorobenzene 0.77
    dimethyl carbonate 1.65
    n-octane 0.13
    formamide 111.47
    cyclopentanone 6.46
    2-pentanone 0.98
    anisole 0.42
    cyclopentyl methyl ether 1.35
    gamma-butyrolactone 16.57
    1-methoxy-2-propanol 10.93
    pyridine 4.84
    3-pentanone 0.81
    furfural 25.65
    n-dodecane 0.08
    diethylene glycol 20.97
    diisopropyl ether 0.15
    tert-amyl alcohol 2.62
    acetylacetone 1.27
    n-hexadecane 0.08
    acetophenone 0.89
    methyl propionate 2.21
    isopentyl acetate 1.34
    trichloroethylene 4.65
    n-nonanol 1.04
    cyclohexanol 4.05
    benzyl alcohol 2.01
    2-ethylhexanol 1.52
    isooctanol 1.27
    dipropyl ether 1.13
    1,2-dichlorobenzene 1.06
    ethyl lactate 3.16
    propylene carbonate 8.03
    n-methylformamide 38.25
    2-pentanol 1.76
    n-pentane 0.18
    1-propoxy-2-propanol 6.19
    1-methoxy-2-propyl acetate 2.2
    2-(2-methoxypropoxy) propanol 3.48
    mesitylene 0.1
    ε-caprolactone 5.51
    p-cymene 0.37
    epichlorohydrin 7.11
    1,1,1-trichloroethane 0.96
    2-aminoethanol 43.76
    morpholine-4-carbaldehyde 18.43
    sulfolane 37.86
    2,2,4-trimethylpentane 0.09
    2-methyltetrahydrofuran 2.55
    n-hexyl acetate 1.21
    isooctane 0.04
    2-(2-butoxyethoxy)ethanol 5.13
    sec-butyl acetate 0.43
    tert-butyl acetate 0.5
    decalin 0.09
    glycerin 55.33
    diglyme 8.08
    acrylic acid 41.63
    isopropyl myristate 0.43
    n-butyric acid 18.05
    acetyl acetate 1.51
    di(2-ethylhexyl) phthalate 1.46
    ethyl propionate 0.92
    nitromethane 38.77
    1,2-diethoxyethane 1.29
    benzonitrile 1.99
    trioctyl phosphate 1.26
    1-bromopropane 0.93
    gamma-valerolactone 13.72
    n-decanol 0.76
    triethyl phosphate 1.55
    4-methyl-2-pentanol 0.58
    propionitrile 2.96
    vinylene carbonate 9.62
    1,1,2-trichlorotrifluoroethane 28.16
    DMS 1.62
    cumene 0.13
    2-octanol 0.84
    2-hexanone 0.65
    octyl acetate 0.79
    limonene 0.59
    1,2-dimethoxyethane 4.87
    ethyl orthosilicate 1.28
    tributyl phosphate 1.4
    diacetone alcohol 2.04
    N,N-dimethylaniline 0.55
    acrylonitrile 7.24
    aniline 1.99
    1,3-propanediol 35.27
    bromobenzene 0.42
    dibromomethane 2.66
    1,1,2,2-tetrachloroethane 4.04
    2-methyl-cyclohexyl acetate 1.27
    tetrabutyl urea 1.82
    diisobutyl methanol 0.69
    2-phenylethanol 2.36
    styrene 0.16
    dioctyl adipate 1.12
    dimethyl sulfate 5.24
    ethyl butyrate 1.64
    methyl lactate 6.91
    butyl lactate 3.64
    diethyl carbonate 1.41
    propanediol butyl ether 6.4
    triethyl orthoformate 1.58
    p-tert-butyltoluene 0.35
    methyl 4-tert-butylbenzoate 1.98
    morpholine 7.44
    tert-butylamine 1.67
    n-dodecanol 0.59
    dimethoxymethane 3.87
    ethylene carbonate 6.2
    cyrene 6.15
    2-ethoxyethyl acetate 1.65
    2-ethylhexyl acetate 1.06
    1,2,4-trichlorobenzene 1.4
    4-methylpyridine 1.88
    dibutyl ether 0.52
    2,6-dimethyl-4-heptanol 0.69
    DEF 3.74
    dimethyl isosorbide 5.58
    tetrachloroethylene 4.78
    eugenol 3.4
    triacetin 1.97
    span 80 5.11
    1,4-butanediol 11.56
    1,1-dichloroethane 1.03
    2-methyl-1-pentanol 1.36
    methyl formate 18.03
    2-methyl-1-butanol 3.18
    n-decane 0.11
    butyronitrile 2.6
    3,7-dimethyl-1-octanol 0.85
    1-chlorooctane 0.33
    1-chlorotetradecane 0.15
    n-nonane 0.11
    undecane 0.08
    tert-butylcyclohexane 0.07
    cyclooctane 0.08
    cyclopentanol 7.72
    tetrahydropyran 1.99
    tert-amyl methyl ether 0.51
    2,5,8-trioxanonane 5.9
    1-hexene 0.27
    2-isopropoxyethanol 3.22
    2,2,2-trifluoroethanol 36.83
    methyl butyrate 1.83

    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