Iron oxide (Fe3O4)

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  • Identifiers

    CAS number
    1317-61-9

    Molecular formula
    Fe3O4

    SMILES
    O=[Fe].O=[Fe]O[Fe]=O

    Safety labels

    Flammable
    Flammable

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 93.6%
    Pungent 24.04%
    Sharp 20.59%
    Burnt 15.51%
    Bitter 15.16%
    Sour 15.08%
    Ethereal 10.42%
    Fermented 9.95%
    Gassy 9.33%
    Clean 9.28%

     

    Flavor
    Odorless 53.67%
    Pungent 38.73%
    Bitter 30.68%
    Rotten 26.47%
    Vinegar 25.71%
    Formyl 25.6%
    Mustard 25.34%
    Sulfur 22.47%
    Decomposing cabbage 20.93%
    Almond 19.6%

     

  • Properties

    pKa est.
    -6.77 (strong acid)

    Molecular weight
    231.53 g/mol

    Flash point

    • -25.15 ˚C est.

  • Synonyms

    • Ferriferrous Oxide
    • Oxide, Ferriferrous
    • Oxide, Ferrosoferric
    • RefChem:923566
    • DTXSID5029639
    • NSC729745
    • 1317-61-9
    • 215-277-5
    • Black Iron Oxide
    • C.I. 77499
    • CHEBI:50821
    • EPT 500
    • ferric ferrous oxide
    • Ferrosoferric Oxide
    • Iron (II, III) Oxide
    • Iron ores, magnetite
    • Iron oxide (Fe3O4)
    • iron(II) diiron(III) oxide
    • Magnetic Black
    • XM0M87F357
    • Iron Oxide Black
    • Iron(II,III)oxide
    • 12227-89-3
    • oxoiron;oxo(oxoferriooxy)iron
    • 120899-48-1
    • EINECS 235-442-5
    • Iron Oxide Pigment Black
    • Iron(II,III) oxide, CP
    • SCHEMBL21436346
    • oxo[(oxoferrio)oxy]iron; oxoiron
    • PD061032
    • Iron(II,III) oxide, powder, <5 mum, 95%
    • EN300-178368
    • Iron(II,III) oxide, 99.99% trace metals basis
    • Q411235
    • Iron(II,III) oxide, nanopowder, 50-100 nm particle size (SEM), 97% trace metals basis
    • 1317-61-9

  • Applications

    Iron oxide (Fe3O4), CAS 1317-61-9, is widely used as a black pigment in coatings and plastics, delivering color and opacity while acting as a magnetic filler in composite systems. It also serves as a magnetic material for cores in electronics, data storage, and electromagnetic interference shielding. Fe3O4 is used in ferrofluids and magnetorheological (MR) fluids for damping and tunable rheology under magnetic fields. It functions as a catalyst support or active phase in various chemical syntheses and oxidation processes. In environmental and materials processing, magnetic separation and adsorption enable removal of contaminants from water streams. In polymer composites, Fe3O4 particles impart magnetic properties to coatings, inks, and other formulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1106.67
    methanol 1652.59
    isopropanol 830.81
    water 585.65
    ethyl acetate 219.8
    n-propanol 686.51
    acetone 742.14
    n-butanol 539.78
    acetonitrile 451.26
    DMF 2688.02
    toluene 64.97
    isobutanol 429.69
    1,4-dioxane 651.69
    methyl acetate 324.91
    THF 762.2
    2-butanone 360.36
    n-pentanol 392.7
    sec-butanol 535.11
    n-hexane 45.21
    ethylene glycol 1185.93
    NMP 890.96
    cyclohexane 52.56
    DMSO 1960.3
    n-butyl acetate 126.94
    n-octanol 201.78
    chloroform 226.46
    n-propyl acetate 178.41
    acetic acid 771.75
    dichloromethane 290.99
    cyclohexanone 286.73
    propylene glycol 666.73
    isopropyl acetate 141.29
    DMAc 1186.95
    2-ethoxyethanol 787.56
    isopentanol 365.6
    n-heptane 49.36
    ethyl formate 246.22
    1,2-dichloroethane 256.6
    n-hexanol 255.07
    2-methoxyethanol 1478.15
    isobutyl acetate 101.39
    tetrachloromethane 70.29
    n-pentyl acetate 129.85
    transcutol 988.08
    n-heptanol 177.93
    ethylbenzene 50.11
    MIBK 182.04
    2-propoxyethanol 523.0
    tert-butanol 774.98
    MTBE 319.95
    2-butoxyethanol 357.76
    propionic acid 412.68
    o-xylene 74.27
    formic acid 940.61
    diethyl ether 397.41
    m-xylene 66.74
    p-xylene 56.8
    chlorobenzene 70.62
    dimethyl carbonate 221.74
    n-octane 25.8
    formamide 1246.62
    cyclopentanone 428.16
    2-pentanone 307.21
    anisole 180.16
    cyclopentyl methyl ether 318.46
    gamma-butyrolactone 416.12
    1-methoxy-2-propanol 836.55
    pyridine 291.45
    3-pentanone 226.3
    furfural 421.2
    n-dodecane 24.47
    diethylene glycol 754.03
    diisopropyl ether 117.37
    tert-amyl alcohol 495.7
    acetylacetone 269.25
    n-hexadecane 25.06
    acetophenone 156.95
    methyl propionate 272.06
    isopentyl acetate 104.03
    trichloroethylene 279.63
    n-nonanol 173.15
    cyclohexanol 319.2
    benzyl alcohol 198.95
    2-ethylhexanol 132.09
    isooctanol 135.35
    dipropyl ether 175.37
    1,2-dichlorobenzene 75.93
    ethyl lactate 154.91
    propylene carbonate 175.04
    n-methylformamide 1116.57
    2-pentanol 382.53
    n-pentane 81.87
    1-propoxy-2-propanol 349.31
    1-methoxy-2-propyl acetate 160.9
    2-(2-methoxypropoxy) propanol 276.55
    mesitylene 55.27
    ε-caprolactone 233.61
    p-cymene 49.4
    epichlorohydrin 440.78
    1,1,1-trichloroethane 129.08
    2-aminoethanol 1095.13
    morpholine-4-carbaldehyde 940.22
    sulfolane 508.36
    2,2,4-trimethylpentane 34.44
    2-methyltetrahydrofuran 417.64
    n-hexyl acetate 167.75
    isooctane 28.44
    2-(2-butoxyethoxy)ethanol 420.71
    sec-butyl acetate 106.11
    tert-butyl acetate 157.71
    decalin 24.83
    glycerin 977.43
    diglyme 650.58
    acrylic acid 420.7
    isopropyl myristate 86.38
    n-butyric acid 328.09
    acetyl acetate 120.01
    di(2-ethylhexyl) phthalate 82.83
    ethyl propionate 144.14
    nitromethane 856.62
    1,2-diethoxyethane 280.2
    benzonitrile 137.8
    trioctyl phosphate 79.47
    1-bromopropane 155.48
    gamma-valerolactone 530.09
    n-decanol 140.3
    triethyl phosphate 72.38
    4-methyl-2-pentanol 195.05
    propionitrile 282.13
    vinylene carbonate 168.0
    1,1,2-trichlorotrifluoroethane 462.54
    DMS 130.03
    cumene 47.63
    2-octanol 136.17
    2-hexanone 199.37
    octyl acetate 113.06
    limonene 78.25
    1,2-dimethoxyethane 811.58
    ethyl orthosilicate 75.4
    tributyl phosphate 80.17
    diacetone alcohol 302.23
    N,N-dimethylaniline 183.61
    acrylonitrile 346.98
    aniline 184.34
    1,3-propanediol 955.94
    bromobenzene 51.43
    dibromomethane 196.67
    1,1,2,2-tetrachloroethane 245.74
    2-methyl-cyclohexyl acetate 89.98
    tetrabutyl urea 139.4
    diisobutyl methanol 98.32
    2-phenylethanol 158.47
    styrene 65.3
    dioctyl adipate 113.74
    dimethyl sulfate 335.32
    ethyl butyrate 111.6
    methyl lactate 294.91
    butyl lactate 140.64
    diethyl carbonate 77.27
    propanediol butyl ether 383.82
    triethyl orthoformate 94.86
    p-tert-butyltoluene 52.55
    methyl 4-tert-butylbenzoate 168.41
    morpholine 809.62
    tert-butylamine 461.75
    n-dodecanol 117.18
    dimethoxymethane 939.35
    ethylene carbonate 146.47
    cyrene 245.14
    2-ethoxyethyl acetate 176.87
    2-ethylhexyl acetate 83.31
    1,2,4-trichlorobenzene 97.11
    4-methylpyridine 230.25
    dibutyl ether 139.3
    2,6-dimethyl-4-heptanol 98.32
    DEF 525.05
    dimethyl isosorbide 311.63
    tetrachloroethylene 220.07
    eugenol 217.38
    triacetin 155.86
    span 80 256.2
    1,4-butanediol 492.98
    1,1-dichloroethane 190.93
    2-methyl-1-pentanol 269.37
    methyl formate 693.3
    2-methyl-1-butanol 343.47
    n-decane 33.09
    butyronitrile 254.21
    3,7-dimethyl-1-octanol 150.7
    1-chlorooctane 81.96
    1-chlorotetradecane 45.28
    n-nonane 32.87
    undecane 27.97
    tert-butylcyclohexane 25.52
    cyclooctane 25.63
    cyclopentanol 431.79
    tetrahydropyran 374.8
    tert-amyl methyl ether 267.71
    2,5,8-trioxanonane 495.65
    1-hexene 106.63
    2-isopropoxyethanol 485.47
    2,2,2-trifluoroethanol 418.25
    methyl butyrate 191.22

    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