Magnesium hydride (MgH2)

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  • Identifiers

    CAS number
    7693-27-8

    Molecular formula
    H2Mg

    SMILES
    [H-].[H-].[Mg+2]

    Safety labels

  • Odor profile

  • Properties

    pKa est.
    13.5 (strong base)

    Molecular weight
    26.321 g/mol

    Flash point

    • -117.42 ˚C est.

  • Synonyms

    • magnesium;hydride
    • MgH2
    • Magnesium hydride (MgH2)
    • 7693-27-8
    • Mg H2
    • SCHEMBL321
    • DTXSID501027581
    • UNII-Y93032D743
    • EINECS 231-705-3
    • 7693-27-8

  • Applications

    Magnesium hydride (MgH2), CAS 7693-27-8, is primarily used as a solid-state hydrogen storage material, offering high hydrogen capacity for on-demand hydrogen supply in stationary and portable energy systems and for hydrogen storage research in fuel-cell applications. It is also studied as a hydrogen donor and reducing agent in selective organic syntheses under suitable conditions. In materials science, MgH2 serves as a model system and component in hydriding/dehydriding cycles and in the development of magnesium-based alloys and composites where controlled hydrogen release and processing behavior are important. Additionally, MgH2 is a focus of energy-storage materials and catalysis research, where understanding dehydrogenation kinetics and material stability informs material design.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 12.43
    methanol 14.12
    isopropanol 8.5
    water 0.18
    ethyl acetate 4.46
    n-propanol 8.75
    acetone 7.7
    n-butanol 7.58
    acetonitrile 7.11
    DMF 11.69
    toluene 1.02
    isobutanol 5.8
    1,4-dioxane 7.67
    methyl acetate 4.75
    THF 8.54
    2-butanone 4.94
    n-pentanol 4.49
    sec-butanol 6.75
    n-hexane 1.13
    ethylene glycol 5.62
    NMP 7.71
    cyclohexane 0.8
    DMSO 10.68
    n-butyl acetate 4.1
    n-octanol 3.14
    chloroform 5.79
    n-propyl acetate 2.35
    acetic acid 11.79
    dichloromethane 4.87
    cyclohexanone 5.07
    propylene glycol 5.86
    isopropyl acetate 2.21
    DMAc 5.73
    2-ethoxyethanol 5.01
    isopentanol 5.4
    n-heptane 0.83
    ethyl formate 3.11
    1,2-dichloroethane 3.08
    n-hexanol 6.97
    2-methoxyethanol 10.37
    isobutyl acetate 1.5
    tetrachloromethane 1.32
    n-pentyl acetate 1.93
    transcutol 15.07
    n-heptanol 2.81
    ethylbenzene 0.71
    MIBK 2.36
    2-propoxyethanol 7.65
    tert-butanol 9.06
    MTBE 4.84
    2-butoxyethanol 4.0
    propionic acid 7.53
    o-xylene 0.85
    formic acid 5.19
    diethyl ether 4.98
    m-xylene 0.85
    p-xylene 0.92
    chlorobenzene 1.78
    dimethyl carbonate 1.62
    n-octane 0.32
    formamide 5.23
    cyclopentanone 6.51
    2-pentanone 4.01
    anisole 2.07
    cyclopentyl methyl ether 3.85
    gamma-butyrolactone 7.6
    1-methoxy-2-propanol 7.14
    pyridine 3.89
    3-pentanone 2.64
    furfural 5.4
    n-dodecane 0.3
    diethylene glycol 6.55
    diisopropyl ether 1.38
    tert-amyl alcohol 6.71
    acetylacetone 3.35
    n-hexadecane 0.31
    acetophenone 1.68
    methyl propionate 3.58
    isopentyl acetate 3.16
    trichloroethylene 5.16
    n-nonanol 2.47
    cyclohexanol 4.22
    benzyl alcohol 1.91
    2-ethylhexanol 3.26
    isooctanol 2.12
    dipropyl ether 3.01
    1,2-dichlorobenzene 1.58
    ethyl lactate 1.63
    propylene carbonate 3.87
    n-methylformamide 6.74
    2-pentanol 4.88
    n-pentane 1.07
    1-propoxy-2-propanol 5.55
    1-methoxy-2-propyl acetate 3.06
    2-(2-methoxypropoxy) propanol 3.52
    mesitylene 0.64
    ε-caprolactone 4.36
    p-cymene 0.76
    epichlorohydrin 5.9
    1,1,1-trichloroethane 3.18
    2-aminoethanol 8.05
    morpholine-4-carbaldehyde 6.83
    sulfolane 8.33
    2,2,4-trimethylpentane 0.55
    2-methyltetrahydrofuran 6.89
    n-hexyl acetate 3.4
    isooctane 0.46
    2-(2-butoxyethoxy)ethanol 5.04
    sec-butyl acetate 1.48
    tert-butyl acetate 2.61
    decalin 0.43
    glycerin 6.42
    diglyme 6.95
    acrylic acid 6.97
    isopropyl myristate 1.27
    n-butyric acid 7.13
    acetyl acetate 2.28
    di(2-ethylhexyl) phthalate 1.31
    ethyl propionate 2.04
    nitromethane 10.83
    1,2-diethoxyethane 4.03
    benzonitrile 2.41
    trioctyl phosphate 1.11
    1-bromopropane 2.52
    gamma-valerolactone 6.88
    n-decanol 1.85
    triethyl phosphate 1.0
    4-methyl-2-pentanol 2.51
    propionitrile 4.61
    vinylene carbonate 3.15
    1,1,2-trichlorotrifluoroethane 4.98
    DMS 2.11
    cumene 0.66
    2-octanol 1.88
    2-hexanone 2.67
    octyl acetate 1.8
    limonene 1.36
    1,2-dimethoxyethane 6.19
    ethyl orthosilicate 1.01
    tributyl phosphate 1.31
    diacetone alcohol 4.12
    N,N-dimethylaniline 1.44
    acrylonitrile 5.55
    aniline 2.34
    1,3-propanediol 8.34
    bromobenzene 1.53
    dibromomethane 3.42
    1,1,2,2-tetrachloroethane 4.37
    2-methyl-cyclohexyl acetate 1.69
    tetrabutyl urea 1.62
    diisobutyl methanol 1.72
    2-phenylethanol 2.62
    styrene 0.97
    dioctyl adipate 1.72
    dimethyl sulfate 2.53
    ethyl butyrate 2.28
    methyl lactate 2.72
    butyl lactate 1.89
    diethyl carbonate 1.41
    propanediol butyl ether 4.43
    triethyl orthoformate 1.51
    p-tert-butyltoluene 0.81
    methyl 4-tert-butylbenzoate 2.11
    morpholine 8.97
    tert-butylamine 5.8
    n-dodecanol 1.4
    dimethoxymethane 4.81
    ethylene carbonate 2.53
    cyrene 2.3
    2-ethoxyethyl acetate 2.56
    2-ethylhexyl acetate 2.34
    1,2,4-trichlorobenzene 1.88
    4-methylpyridine 3.51
    dibutyl ether 2.61
    2,6-dimethyl-4-heptanol 1.72
    DEF 4.7
    dimethyl isosorbide 4.1
    tetrachloroethylene 3.11
    eugenol 2.43
    triacetin 2.6
    span 80 3.37
    1,4-butanediol 3.19
    1,1-dichloroethane 3.69
    2-methyl-1-pentanol 3.68
    methyl formate 4.31
    2-methyl-1-butanol 5.28
    n-decane 0.45
    butyronitrile 4.76
    3,7-dimethyl-1-octanol 2.7
    1-chlorooctane 1.47
    1-chlorotetradecane 0.61
    n-nonane 0.48
    undecane 0.36
    tert-butylcyclohexane 0.53
    cyclooctane 0.29
    cyclopentanol 5.23
    tetrahydropyran 6.28
    tert-amyl methyl ether 3.31
    2,5,8-trioxanonane 5.04
    1-hexene 2.75
    2-isopropoxyethanol 3.45
    2,2,2-trifluoroethanol 3.12
    methyl butyrate 2.78

    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