Magnesium Carbonate

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  • Identifiers

    CAS number
    546-93-0

    Molecular formula
    CMgO3

    SMILES
    C(=O)([O-])[O-].[Mg+2]

  • Odor profile

    Fragrance
    Odorless 76.84%
    Sour 33.9%
    Sharp 22.15%
    Sweet 18.4%
    Clean 17.69%
    Creamy 15.53%
    Pungent 15.29%
    Winey 15.21%
    Milky 15.02%
    Dry 14.72%

     

    Flavor
    Odorless 61.82%
    Sour 36.82%
    Vinegar 22.45%
    Acidic 22.04%
    Sharp 21.72%
    Mousy 21.56%
    Formyl 21.38%
    Phenolic 21.15%
    Soy 20.47%
    Very mild 19.83%

     

    Odor impact est.
    High

  • Properties

    pKa est.
    0.73 (strong acid)

    Molecular weight
    84.31 g/mol

    Melting point expt.

    • 662 °F (Decomposes) (NIOSH, 2024)
    • Decomposes at 350
    • 990 °C
    • 662 °F (decomposes)
    • 662 °F (Decomposes)

    Boiling point

    • Decomposes (NIOSH, 2024)
    • Decomposes
    • decomposes

    Flash point

    • 73.53 ˚C est.

    Solubility expt.

    • 0.01 % (NIOSH, 2024)
    • 0.1g/L
    • Practically insoluble both in water or ethanol
    • White, friable masses or bulky, white powder; at about 700 °C is converted to MgO; sol in about 3,300 parts CO2-free water; more sol in water containing CO2; sol in dilute acids with effervescence; insol in alcohol /Magnesium carbonate hydroxide/
    • 0.0106 G/100 CC COLD WATER
    • SOL IN ACID, AQ CARBON DIOXIDE; INSOL IN ACETONE, AMMONIA
    • Insoluble in alcohol; soluble in acids
    • Solubility in water, g/100ml at 20 °C: 0.01 (very poor)
    • 0.01%

  • Synonyms

    • MAGNESIUM CARBONATE
    • 546-93-0
    • Magnesite
    • Magnesium carbonate anhydrous
    • 13717-00-5
    • Magmaster
    • Carbonic acid, magnesium salt
    • Carbonate magnesium
    • Magnesite (Mg(CO3))
    • Magnesite dust
    • Caswell No. 530
    • Carbonic acid, magnesium salt (1:1)
    • magnesium;carbonate
    • Hydromagnesite
    • Stan-mag magnesium carbonate
    • Magnesium carbonate (1:1)
    • 7757-69-9
    • Magnesium carbonate (MgCO3)
    • DCI light magnesium carbonate
    • HSDB 211
    • Magnesiumkarbonat
    • Magnesium(II) carbonate (1:1)
    • C.I. 77713
    • EINECS 208-915-9
    • NSC 83511
    • EPA Pesticide Chemical Code 073503
    • CI 77713
    • MgCO3
    • UNII-0IHC698356
    • CHEBI:31793
    • AI3-00768
    • Light magnesium carbonate
    • Magnesium (as carbonate)
    • Magnesium Carbonate Light
    • Ins no.504(i)
    • MAGNESIUM CARBONATE, LIGHT AR
    • Anhydrous magnesium carbonate
    • Ins-504(i)
    • Magnesium carbonate gold star
    • EC 208-915-9
    • E-504(i)
    • NSC-83511
    • 0IHC698356
    • 53678-75-4
    • Giobertite
    • Kimboshi
    • Apolda
    • Destab
    • Magfy
    • GP 20 (carbonate)
    • MA 70 (carbonate)
    • Gold Star (carbonate)
    • Magnesium carbonate [USAN]
    • 208-915-9
    • Australian magnesite
    • Magnesium carbonate,light
    • HEAVY MAGNESIUM CARBONATE
    • Magnesio carbonato
    • Magnesium carbonate; Magnesium carbonate light; Hydrated basic magnesium carbonate
    • EINECS 231-817-2
    • MFCD00064632
    • Carbonic acid, magnesium salt (1:?)
    • Magnesium carbonicum 6
    • Humco Dewees Carminative
    • Magnesium carbonate - heavy
    • Carbonic Acid Magnesium Salt
    • CHEMBL1200736
    • DTXSID4049660
    • Magnesium Carbonate Microparticles
    • CS-B1764
    • Magnesium, [carbonato(2-)-|EO]-
    • MAGNESIUM CARBONATE [WHO-DD]
    • AKOS015903527
    • Magnesium carbonate powder 1-5 micron
    • DB09481
    • FM32755
    • USEPA/OPP Pesticide Code: 073503
    • E504
    • DB-254188
    • DB-255103
    • ANHYDROUS MAGNESIUM CARBONATE [MART.]
    • NS00074347
    • Q407931
    • 695808-81-2

  • Applications

    Magnesium carbonate (CAS 546-93-0) serves as a desiccant and moisture-absorbing filler in industrial and consumer formulations; it is used as a processing aid and white filler in paints, coatings, inks, and plastics; it acts as a mild abrasive in cleaning products; in cosmetics and personal care it functions as an absorbent and bulking agent for powder products; in sports it is widely used as athletic chalk to improve grip by absorbing moisture; in certain markets it may also function as an anti-caking agent in powdered foods, subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 141.0
    methanol 238.02
    isopropanol 119.31
    water 152.21
    ethyl acetate 24.94
    n-propanol 90.54
    acetone 87.62
    n-butanol 75.08
    acetonitrile 43.86
    DMF 562.16
    toluene 9.3
    isobutanol 58.92
    1,4-dioxane 81.51
    methyl acetate 38.88
    THF 125.18
    2-butanone 44.81
    n-pentanol 45.62
    sec-butanol 74.72
    n-hexane 6.26
    ethylene glycol 138.87
    NMP 197.6
    cyclohexane 6.97
    DMSO 498.92
    n-butyl acetate 13.89
    n-octanol 24.32
    chloroform 11.71
    n-propyl acetate 15.49
    acetic acid 64.57
    dichloromethane 21.59
    cyclohexanone 34.34
    propylene glycol 93.8
    isopropyl acetate 17.31
    DMAc 305.78
    2-ethoxyethanol 96.33
    isopentanol 54.91
    n-heptane 6.05
    ethyl formate 39.98
    1,2-dichloroethane 28.11
    n-hexanol 32.65
    2-methoxyethanol 209.13
    isobutyl acetate 7.04
    tetrachloromethane 5.15
    n-pentyl acetate 14.88
    transcutol 69.15
    n-heptanol 25.0
    ethylbenzene 5.4
    MIBK 22.12
    2-propoxyethanol 72.52
    tert-butanol 138.15
    MTBE 56.1
    2-butoxyethanol 48.44
    propionic acid 48.22
    o-xylene 11.36
    formic acid 133.01
    diethyl ether 54.8
    m-xylene 8.7
    p-xylene 6.17
    chlorobenzene 6.51
    dimethyl carbonate 42.87
    n-octane 3.26
    formamide 173.38
    cyclopentanone 56.19
    2-pentanone 36.96
    anisole 18.21
    cyclopentyl methyl ether 44.15
    gamma-butyrolactone 65.49
    1-methoxy-2-propanol 136.95
    pyridine 36.97
    3-pentanone 27.59
    furfural 65.08
    n-dodecane 2.68
    diethylene glycol 93.64
    diisopropyl ether 14.86
    tert-amyl alcohol 86.49
    acetylacetone 30.23
    n-hexadecane 2.73
    acetophenone 17.34
    methyl propionate 40.29
    isopentyl acetate 11.04
    trichloroethylene 19.49
    n-nonanol 22.14
    cyclohexanol 40.76
    benzyl alcohol 23.44
    2-ethylhexanol 15.16
    isooctanol 17.87
    dipropyl ether 22.35
    1,2-dichlorobenzene 6.46
    ethyl lactate 22.54
    propylene carbonate 27.9
    n-methylformamide 198.13
    2-pentanol 49.98
    n-pentane 11.9
    1-propoxy-2-propanol 47.41
    1-methoxy-2-propyl acetate 21.43
    2-(2-methoxypropoxy) propanol 38.89
    mesitylene 7.32
    ε-caprolactone 30.16
    p-cymene 5.85
    epichlorohydrin 62.95
    1,1,1-trichloroethane 8.96
    2-aminoethanol 134.56
    morpholine-4-carbaldehyde 149.08
    sulfolane 107.39
    2,2,4-trimethylpentane 4.4
    2-methyltetrahydrofuran 60.7
    n-hexyl acetate 17.07
    isooctane 3.6
    2-(2-butoxyethoxy)ethanol 50.11
    sec-butyl acetate 9.32
    tert-butyl acetate 19.59
    decalin 2.59
    glycerin 142.14
    diglyme 78.99
    acrylic acid 52.75
    isopropyl myristate 10.08
    n-butyric acid 39.78
    acetyl acetate 12.42
    di(2-ethylhexyl) phthalate 12.06
    ethyl propionate 17.44
    nitromethane 93.56
    1,2-diethoxyethane 24.36
    benzonitrile 13.16
    trioctyl phosphate 11.57
    1-bromopropane 18.52
    gamma-valerolactone 76.83
    n-decanol 18.36
    triethyl phosphate 11.1
    4-methyl-2-pentanol 26.53
    propionitrile 34.93
    vinylene carbonate 27.28
    1,1,2-trichlorotrifluoroethane 62.09
    DMS 15.49
    cumene 5.23
    2-octanol 18.12
    2-hexanone 19.85
    octyl acetate 14.06
    limonene 8.5
    1,2-dimethoxyethane 128.87
    ethyl orthosilicate 10.66
    tributyl phosphate 10.29
    diacetone alcohol 42.36
    N,N-dimethylaniline 23.7
    acrylonitrile 45.33
    aniline 23.87
    1,3-propanediol 119.14
    bromobenzene 4.13
    dibromomethane 15.63
    1,1,2,2-tetrachloroethane 22.78
    2-methyl-cyclohexyl acetate 10.06
    tetrabutyl urea 19.22
    diisobutyl methanol 12.09
    2-phenylethanol 18.68
    styrene 6.1
    dioctyl adipate 13.7
    dimethyl sulfate 75.48
    ethyl butyrate 13.01
    methyl lactate 52.92
    butyl lactate 17.89
    diethyl carbonate 10.05
    propanediol butyl ether 43.13
    triethyl orthoformate 12.81
    p-tert-butyltoluene 6.64
    methyl 4-tert-butylbenzoate 26.35
    morpholine 106.75
    tert-butylamine 75.26
    n-dodecanol 14.9
    dimethoxymethane 188.36
    ethylene carbonate 23.74
    cyrene 37.13
    2-ethoxyethyl acetate 19.46
    2-ethylhexyl acetate 8.53
    1,2,4-trichlorobenzene 7.96
    4-methylpyridine 33.68
    dibutyl ether 13.68
    2,6-dimethyl-4-heptanol 12.09
    DEF 78.88
    dimethyl isosorbide 41.95
    tetrachloroethylene 18.48
    eugenol 30.43
    triacetin 16.3
    span 80 31.94
    1,4-butanediol 57.67
    1,1-dichloroethane 15.75
    2-methyl-1-pentanol 30.13
    methyl formate 126.32
    2-methyl-1-butanol 49.15
    n-decane 3.68
    butyronitrile 31.6
    3,7-dimethyl-1-octanol 15.91
    1-chlorooctane 7.98
    1-chlorotetradecane 4.79
    n-nonane 3.64
    undecane 3.11
    tert-butylcyclohexane 2.62
    cyclooctane 3.64
    cyclopentanol 57.65
    tetrahydropyran 50.08
    tert-amyl methyl ether 46.64
    2,5,8-trioxanonane 65.11
    1-hexene 12.61
    2-isopropoxyethanol 53.07
    2,2,2-trifluoroethanol 46.43
    methyl butyrate 22.7

    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