1,1-Dimethylhydrazine

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  • Identifiers

    CAS number
    57-14-7

    Molecular formula
    C2H8N2

    SMILES
    CN(C)N

    Safety labels

    Flammable
    Flammable

    Corrosive
    Corrosive

    Acute Toxic
    Acute Toxic

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Fishy 77.2%
    Cheesy 56.54%
    Ripe 49.13%
    Odorless 39.61%
    Pungent 17.95%
    Oily 17.22%
    Animal 17.01%
    Meaty 14.59%
    Musty 14.03%
    Sweaty 13.41%

     

    Flavor
    Fishy 44.22%
    Sulfurous 29.0%
    Sulfury 27.49%
    Meaty 26.01%
    Ammoniacal 25.07%
    Onion 24.35%
    Odorless 21.82%
    Glue 20.09%
    Bloody 20.0%
    Sweaty 19.6%

     

    Odor impact est.
    High

    Odor threshold

    • Odor Threshold Low: 6.1 [mmHg]. Odor Threshold High: 14.0 [mmHg]. Detection odor threshold from AIHA (mean = 9.2)
    • 12.0 mg/cu m (low); 20.0 mg/cu m (high)
    • Sharp, ammonia-like odor. Odor threshold: 0.3, 11.7, and 6-14 ppm.
    • The warning properties (irritation & odor) of the hydrazines are probably sufficient to prevent acute poisoning from short exposures. However, in view of the chronic toxicity properties, the warning properties should not be considered adequate for prolonged exposures. /Hydrazines/

  • Properties

    XLogP3-AA
    -0.5

    pKa est.
    7.25 (neutral)

    Molecular weight
    60.1 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra fast

    Melting point expt.

    • -72 °F (EPA, 1998)
    • -58 °C
    • -72 °F

    Boiling point

    • 147 °F at 760 mmHg (EPA, 1998)
    • 63.9 °C at 760 mm Hg
    • 64 °C
    • 147 °F

    Flash point

    • 1.12 ˚C est.
    • 5 °F (EPA, 1998)
    • -15 °C, 5 °F (closed cup)
    • -15 °C c.c.
    • 5 °F

    Solubility expt.

    • Decomposes (NTP, 1992)
    • Very sol in methanol and ethanol
    • >10% in water
    • Miscible with dimethylformamide, hydrocarbons, alcohol, ether
    • Miscible in water at 25 °C
    • Solubility in water: very good
    • Miscible

  • Synonyms

    • 1,1-DIMETHYLHYDRAZINE
    • 57-14-7
    • N,N-Dimethylhydrazine
    • Dimazine
    • gem-Dimethylhydrazine
    • 1,1-Dimethylhydrazin
    • Unsymmetrical dimethylhydrazine
    • Unsym-dimethylhydrazine
    • u-Dimethylhydrazine
    • 1,1-Dimethyl hydrazine
    • Dimazin
    • uns-Dimethylhydrazine
    • UDMH
    • Hydrazine, N,N-dimethyl-
    • Hydrazine, 1,1-dimethyl-
    • as-Dimethylhydrazine
    • as-Dimethyl hydrazine
    • asymmetric Dimethylhydrazine
    • RCRA waste number U098
    • unsymmetrical-Dimethylhydrazine
    • Dimethylhydrazine, unsym.
    • asymmetric-Dimethylhydrazine
    • N,N-Dimetilidrazina
    • CCRIS 258
    • Dimethylhydrazine unsymmetrical
    • NSC 60517
    • HSDB 528
    • N,N-Dimetilidrazina [Italian]
    • 1,1-Dimethylhydrazin [German]
    • DTXSID1020516
    • Niesymetryczna dwu metylohydrazyna
    • EINECS 200-316-0
    • BRN 0605261
    • 4WPQ90N53J
    • Dimethylhydrazine, unsymmetrical
    • 1.1-Dimethylhydrazine
    • Niesymetryczna dwu metylohydrazyna [Polish]
    • NSC-60517
    • DTXCID50516
    • (CH3)2NNH2
    • CHEBI:18853
    • EC 200-316-0
    • NSC60517
    • 1,1-DIMETHYLHYDRAZINE [MI]
    • 1,1-DIMETHYLHYDRAZINE [HSDB]
    • 1,1-DIMETHYLHYDRAZINE [IARC]
    • N,N-dimetilidrazina (Italian)
    • 1,1-dimethyhydrazine
    • 1,1-DIMETHYLHYDRAZINE (IARC)
    • 1,1-DIMETHYLHYDRAZIN (GERMAN)
    • DIMETHYLHYDRAZINE, (UNSYMMETRICAL)
    • DIMETHYLHYDRAZINE, [UNSYMMETRICAL]
    • C2H8N2
    • NIESYMETRYCZNA DWU METYLOHYDRAZYNA (POLISH)
    • UN1163
    • Dimethyl hydrazine (DMH)
    • RCRA waste no. U098
    • UNII-4WPQ90N53J
    • Hydrazine, dimethyl
    • 1,1-dimethyldiazane
    • Dimethylhydrazine, as
    • asym-Dimethylhydrazine
    • Hydrazine,N-dimethyl-
    • Hydrazine,1-dimethyl-
    • N,N-dimethyl hydrazine
    • N,N-Dimethyl-hydrazine
    • 1,1-dimethyl-hydrazine
    • Me2NNH2
    • N',N'-dimethylhydrazine
    • ASYM DIMETHYLHYDRAZINE
    • unsymmetrical-dimethylhyrazine
    • N,N-Dimethylhydrazine, 98%
    • WLN: ZN1&1
    • DTXSID70193615
    • HYDRAZINE, 1,1-DIMETHYL
    • Tox21_302358
    • MFCD00007628
    • 1,1-Dimethylhydrazine (ACGIH:OSHA)
    • AKOS000119664
    • UN 1163
    • CAS-57-14-7
    • USEPA/OPP Pesticide Code: 600018
    • NCGC00255194-01
    • D0740
    • NS00008277
    • C19233
    • A831327
    • InChI=1/C2H8N2/c1-4(2)3/h3H2,1-2H
    • Q161296
    • Dimethylhydrazine, unsymmetrical [UN1163] [Poison]
    • 200-316-0

  • Applications

    1,1-Dimethylhydrazine (CAS 57-14-7) is primarily used as a high-energy liquid propellant in aerospace, acting as a hypergolic fuel with oxidizers such as nitrogen tetroxide. In chemical manufacturing it is employed as an organic synthesis intermediate to introduce dimethylhydrazine functionality and to prepare more complex hydrazine-containing compounds. It may be used as a precursor or building block in the development of specialty chemicals, including research reagents and catalysts, in R&D settings. Due to its toxicity and reactivity, use is subject to strict handling practices and local regulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 123.2
    methanol 294.45
    isopropanol 53.05
    water 572.57
    ethyl acetate 23.04
    n-propanol 79.48
    acetone 33.47
    n-butanol 44.67
    acetonitrile 52.83
    DMF 107.38
    toluene 4.44
    isobutanol 40.91
    1,4-dioxane 41.55
    methyl acetate 46.36
    THF 42.59
    2-butanone 31.99
    n-pentanol 17.69
    sec-butanol 43.11
    n-hexane 2.81
    ethylene glycol 251.12
    NMP 125.74
    cyclohexane 4.93
    DMSO 43.87
    n-butyl acetate 20.21
    n-octanol 15.59
    chloroform 51.0
    n-propyl acetate 11.66
    acetic acid 338.97
    dichloromethane 33.05
    cyclohexanone 32.19
    propylene glycol 178.22
    isopropyl acetate 9.68
    DMAc 120.21
    2-ethoxyethanol 48.83
    isopentanol 18.29
    n-heptane 5.92
    ethyl formate 31.87
    1,2-dichloroethane 14.66
    n-hexanol 36.89
    2-methoxyethanol 138.46
    isobutyl acetate 7.36
    tetrachloromethane 23.74
    n-pentyl acetate 10.63
    transcutol 65.89
    n-heptanol 20.91
    ethylbenzene 2.24
    MIBK 5.83
    2-propoxyethanol 75.78
    tert-butanol 38.49
    MTBE 14.41
    2-butoxyethanol 43.65
    propionic acid 165.39
    o-xylene 5.53
    formic acid 434.51
    diethyl ether 14.4
    m-xylene 3.45
    p-xylene 3.63
    chlorobenzene 8.15
    dimethyl carbonate 19.04
    n-octane 1.78
    formamide 199.82
    cyclopentanone 43.75
    2-pentanone 13.89
    anisole 8.36
    cyclopentyl methyl ether 18.96
    gamma-butyrolactone 64.61
    1-methoxy-2-propanol 63.94
    pyridine 33.79
    3-pentanone 18.98
    furfural 68.01
    n-dodecane 1.42
    diethylene glycol 101.66
    diisopropyl ether 3.15
    tert-amyl alcohol 37.65
    acetylacetone 14.26
    n-hexadecane 1.39
    acetophenone 11.41
    methyl propionate 34.2
    isopentyl acetate 13.05
    trichloroethylene 34.84
    n-nonanol 14.07
    cyclohexanol 33.07
    benzyl alcohol 15.56
    2-ethylhexanol 17.89
    isooctanol 11.62
    dipropyl ether 14.99
    1,2-dichlorobenzene 9.55
    ethyl lactate 23.42
    propylene carbonate 34.27
    n-methylformamide 121.08
    2-pentanol 19.23
    n-pentane 4.24
    1-propoxy-2-propanol 51.92
    1-methoxy-2-propyl acetate 22.1
    2-(2-methoxypropoxy) propanol 33.16
    mesitylene 2.19
    ε-caprolactone 36.94
    p-cymene 6.02
    epichlorohydrin 31.7
    1,1,1-trichloroethane 18.56
    2-aminoethanol 224.63
    morpholine-4-carbaldehyde 94.09
    sulfolane 63.02
    2,2,4-trimethylpentane 2.53
    2-methyltetrahydrofuran 28.99
    n-hexyl acetate 14.67
    isooctane 0.92
    2-(2-butoxyethoxy)ethanol 39.23
    sec-butyl acetate 6.74
    tert-butyl acetate 8.85
    decalin 1.62
    glycerin 248.83
    diglyme 50.0
    acrylic acid 200.35
    isopropyl myristate 6.16
    n-butyric acid 77.82
    acetyl acetate 19.06
    di(2-ethylhexyl) phthalate 12.42
    ethyl propionate 12.84
    nitromethane 152.29
    1,2-diethoxyethane 11.19
    benzonitrile 13.71
    trioctyl phosphate 8.68
    1-bromopropane 9.14
    gamma-valerolactone 63.53
    n-decanol 10.69
    triethyl phosphate 12.69
    4-methyl-2-pentanol 7.26
    propionitrile 36.19
    vinylene carbonate 39.45
    1,1,2-trichlorotrifluoroethane 110.69
    DMS 16.73
    cumene 2.32
    2-octanol 9.2
    2-hexanone 8.49
    octyl acetate 10.8
    limonene 10.06
    1,2-dimethoxyethane 29.02
    ethyl orthosilicate 11.91
    tributyl phosphate 10.32
    diacetone alcohol 21.55
    N,N-dimethylaniline 8.4
    acrylonitrile 51.79
    aniline 24.22
    1,3-propanediol 120.3
    bromobenzene 5.08
    dibromomethane 20.8
    1,1,2,2-tetrachloroethane 31.2
    2-methyl-cyclohexyl acetate 14.35
    tetrabutyl urea 13.64
    diisobutyl methanol 7.23
    2-phenylethanol 20.37
    styrene 3.0
    dioctyl adipate 11.79
    dimethyl sulfate 30.46
    ethyl butyrate 15.54
    methyl lactate 52.35
    butyl lactate 20.31
    diethyl carbonate 13.28
    propanediol butyl ether 41.78
    triethyl orthoformate 14.94
    p-tert-butyltoluene 6.34
    methyl 4-tert-butylbenzoate 19.3
    morpholine 61.78
    tert-butylamine 24.22
    n-dodecanol 8.32
    dimethoxymethane 33.09
    ethylene carbonate 28.98
    cyrene 31.59
    2-ethoxyethyl acetate 15.98
    2-ethylhexyl acetate 12.01
    1,2,4-trichlorobenzene 16.11
    4-methylpyridine 20.21
    dibutyl ether 6.66
    2,6-dimethyl-4-heptanol 7.23
    DEF 31.79
    dimethyl isosorbide 34.14
    tetrachloroethylene 35.27
    eugenol 24.79
    triacetin 24.19
    span 80 39.27
    1,4-butanediol 46.85
    1,1-dichloroethane 17.01
    2-methyl-1-pentanol 9.51
    methyl formate 72.48
    2-methyl-1-butanol 27.02
    n-decane 2.1
    butyronitrile 20.01
    3,7-dimethyl-1-octanol 11.05
    1-chlorooctane 5.0
    1-chlorotetradecane 2.6
    n-nonane 2.0
    undecane 1.65
    tert-butylcyclohexane 1.79
    cyclooctane 1.62
    cyclopentanol 49.74
    tetrahydropyran 25.29
    tert-amyl methyl ether 14.85
    2,5,8-trioxanonane 41.98
    1-hexene 5.23
    2-isopropoxyethanol 24.45
    2,2,2-trifluoroethanol 211.57
    methyl butyrate 15.42

    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