Chromium(III) oxide

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  • Identifiers

    CAS number
    1308-38-9

    Molecular formula
    Cr2O3

    SMILES
    O=[Cr]O[Cr]=O

    Safety labels

    Irritant
    Irritant

    Health Hazard
    Health

  • Odor profile

    Fragrance
    Odorless 81.25%
    Sour 23.68%
    Pungent 21.71%
    Sharp 21.63%
    Ethereal 20.32%
    Burnt 18.94%
    Sulfurous 14.98%
    Cooked 13.9%
    Caramellic 13.41%
    Winey 13.39%

     

  • Properties

    pKa est.
    -31.11 (strong acid)

    Molecular weight
    151.99 g/mol

    Melting point expt.

    • 2435 °C

    Boiling point

    • 4000 °C

    Flash point

    • -134.21 ˚C est.

    Solubility expt.

    • In water, 3.13 ug/L at 20 °C, pH 6; 2.96 ug/L at 20 °C, pH 8
    • Practically insoluble in water
    • Practically insoluble in alcohol, acetone; slightly soluble in acids, alkalies
    • Insoluble in acids, and alkalies
    • Solubility in water: none

  • Synonyms

    • Chromium(III) oxide
    • 1308-38-9
    • Chromia
    • Dichromium trioxide
    • Chromium sesquioxide
    • oxo(oxochromiooxy)chromium
    • Green chromium oxide
    • Chromium(3+) oxide
    • Green oxide of chromium
    • Chromium(III) sesquioxide
    • MFCD00010949
    • Chrome Green
    • 196696-68-1
    • Green cinnabar
    • Chrome ochre
    • Green rouge
    • Anadonis Green
    • Casalis Green
    • Leaf green
    • Chrome Ocher
    • Levanox green ga
    • Oxide of chromium
    • Green chrome oxide
    • Chromic Acid Green
    • Green chromic oxide
    • C-Grun [German]
    • Chrome Green F 3
    • Kromex U 1
    • OKhP1
    • Chrome Oxide Green BX
    • Chrome Oxide Green GP
    • Amperit 704.0
    • Chromium(3+) trioxide
    • Amdry 6410
    • Chromium Oxide X1134
    • Chrome Oxide Green GN-M
    • Chromium oxide (Cr2O3)
    • 11661 Green
    • Dichromium trioxide [BAN]
    • Chromium oxide (Cr8O12)
    • C-Grun
    • Chrom(III)-oxid
    • Pure chromium oxide green 59
    • CCRIS 3182
    • Chromium(III) oxide (2:3)
    • Green oxide of chromium oc-31
    • HSDB 1619
    • Cosmetic hydrophobic Green 9409
    • Chrome oxide (Cr2O3)
    • Cr2O3
    • EINECS 215-160-9
    • PK 5304
    • Cosmetic micro blend chrome oxide 9229
    • P 106F10
    • UNII-X5Z09SU859
    • C.I. 77288
    • chromium;trioxochromium
    • DSSTox_CID_326
    • EC 215-160-9
    • DSSTox_RID_75514
    • DSSTox_GSID_20326
    • Chromium(III) oxide, ultra dry
    • DTXSID4043721
    • CHEBI:48242
    • Chromium Oxide Powder, 99% Nano
    • Chromium(III) oxide, Puratronic?
    • Tox21_200784
    • AKOS015904053
    • Chromium(III) oxide, puriss., 98%
    • FC54942
    • Chromium(III) oxide, powder, >=98%
    • NCGC00248833-01
    • NCGC00258338-01
    • SY059326
    • NS00074372
    • Chromium(III) oxide, SAJ first grade, >=99.0%
    • Q407905
    • Chromium(III) oxide, powder, 99.9% trace metals basis
    • Chromium(III) oxide, nanopowder, <100 nm particle size (TEM), 98% trace metals basis

  • Applications

    Chromium(III) oxide (CAS 1308-38-9) is a stable green inorganic oxide widely used as a pigment in paints, coatings, plastics, and ceramic glazes; it also serves as a high-purity abrasive for polishing metals, glass, and optical components; it functions as a refractory ceramic material for high-temperature applications and kiln linings; and it may act as a catalyst support or active phase in certain chemical processing reactions.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1488.72
    methanol 1965.5
    isopropanol 1302.04
    water 766.86
    ethyl acetate 445.5
    n-propanol 1014.67
    acetone 943.99
    n-butanol 878.58
    acetonitrile 642.63
    DMF 2387.34
    toluene 209.39
    isobutanol 716.8
    1,4-dioxane 984.07
    methyl acetate 490.11
    THF 1735.96
    2-butanone 556.96
    n-pentanol 584.76
    sec-butanol 896.81
    n-hexane 159.15
    ethylene glycol 1078.15
    NMP 1100.76
    cyclohexane 130.16
    DMSO 1473.9
    n-butyl acetate 199.94
    n-octanol 343.34
    chloroform 639.01
    n-propyl acetate 312.2
    acetic acid 736.77
    dichloromethane 568.5
    cyclohexanone 383.81
    propylene glycol 1011.37
    isopropyl acetate 340.82
    DMAc 1478.23
    2-ethoxyethanol 1158.84
    isopentanol 624.44
    n-heptane 124.82
    ethyl formate 415.3
    1,2-dichloroethane 419.07
    n-hexanol 442.05
    2-methoxyethanol 2129.93
    isobutyl acetate 200.09
    tetrachloromethane 239.23
    n-pentyl acetate 203.84
    transcutol 927.39
    n-heptanol 337.95
    ethylbenzene 139.31
    MIBK 367.48
    2-propoxyethanol 986.05
    tert-butanol 1292.58
    MTBE 655.43
    2-butoxyethanol 594.59
    propionic acid 491.44
    o-xylene 188.61
    formic acid 821.24
    diethyl ether 809.71
    m-xylene 196.92
    p-xylene 145.73
    chlorobenzene 156.8
    dimethyl carbonate 478.23
    n-octane 64.41
    formamide 1149.08
    cyclopentanone 673.67
    2-pentanone 526.87
    anisole 370.01
    cyclopentyl methyl ether 805.99
    gamma-butyrolactone 670.87
    1-methoxy-2-propanol 1761.59
    pyridine 421.71
    3-pentanone 402.25
    furfural 542.47
    n-dodecane 53.68
    diethylene glycol 1049.67
    diisopropyl ether 298.31
    tert-amyl alcohol 877.59
    acetylacetone 471.21
    n-hexadecane 55.08
    acetophenone 259.62
    methyl propionate 529.47
    isopentyl acetate 167.59
    trichloroethylene 459.88
    n-nonanol 300.77
    cyclohexanol 566.53
    benzyl alcohol 311.73
    2-ethylhexanol 230.06
    isooctanol 252.96
    dipropyl ether 376.63
    1,2-dichlorobenzene 149.21
    ethyl lactate 328.93
    propylene carbonate 348.23
    n-methylformamide 1162.44
    2-pentanol 695.58
    n-pentane 238.81
    1-propoxy-2-propanol 626.09
    1-methoxy-2-propyl acetate 323.78
    2-(2-methoxypropoxy) propanol 411.82
    mesitylene 144.18
    ε-caprolactone 359.97
    p-cymene 102.85
    epichlorohydrin 766.53
    1,1,1-trichloroethane 365.77
    2-aminoethanol 1290.73
    morpholine-4-carbaldehyde 1055.46
    sulfolane 702.14
    2,2,4-trimethylpentane 98.99
    2-methyltetrahydrofuran 863.76
    n-hexyl acetate 277.18
    isooctane 87.85
    2-(2-butoxyethoxy)ethanol 545.03
    sec-butyl acetate 228.51
    tert-butyl acetate 400.97
    decalin 72.23
    glycerin 1279.61
    diglyme 837.61
    acrylic acid 466.36
    isopropyl myristate 150.04
    n-butyric acid 476.44
    acetyl acetate 252.08
    di(2-ethylhexyl) phthalate 131.12
    ethyl propionate 352.24
    nitromethane 953.57
    1,2-diethoxyethane 343.26
    benzonitrile 211.23
    trioctyl phosphate 132.71
    1-bromopropane 341.57
    gamma-valerolactone 745.19
    n-decanol 234.2
    triethyl phosphate 139.82
    4-methyl-2-pentanol 393.92
    propionitrile 472.43
    vinylene carbonate 292.31
    1,1,2-trichlorotrifluoroethane 671.2
    DMS 206.33
    cumene 122.6
    2-octanol 268.1
    2-hexanone 338.43
    octyl acetate 193.91
    limonene 145.23
    1,2-dimethoxyethane 1168.88
    ethyl orthosilicate 149.96
    tributyl phosphate 123.92
    diacetone alcohol 607.69
    N,N-dimethylaniline 358.65
    acrylonitrile 507.97
    aniline 370.09
    1,3-propanediol 1202.5
    bromobenzene 132.28
    dibromomethane 416.45
    1,1,2,2-tetrachloroethane 486.17
    2-methyl-cyclohexyl acetate 166.15
    tetrabutyl urea 192.02
    diisobutyl methanol 174.24
    2-phenylethanol 266.61
    styrene 155.15
    dioctyl adipate 183.81
    dimethyl sulfate 598.0
    ethyl butyrate 206.02
    methyl lactate 575.91
    butyl lactate 227.28
    diethyl carbonate 149.0
    propanediol butyl ether 564.69
    triethyl orthoformate 189.25
    p-tert-butyltoluene 122.34
    methyl 4-tert-butylbenzoate 300.8
    morpholine 1248.29
    tert-butylamine 869.64
    n-dodecanol 191.94
    dimethoxymethane 1763.84
    ethylene carbonate 278.99
    cyrene 442.19
    2-ethoxyethyl acetate 248.44
    2-ethylhexyl acetate 134.57
    1,2,4-trichlorobenzene 188.17
    4-methylpyridine 390.43
    dibutyl ether 228.03
    2,6-dimethyl-4-heptanol 174.24
    DEF 690.56
    dimethyl isosorbide 548.22
    tetrachloroethylene 335.11
    eugenol 373.88
    triacetin 236.83
    span 80 367.96
    1,4-butanediol 569.28
    1,1-dichloroethane 440.72
    2-methyl-1-pentanol 405.81
    methyl formate 782.44
    2-methyl-1-butanol 629.86
    n-decane 77.03
    butyronitrile 431.2
    3,7-dimethyl-1-octanol 244.9
    1-chlorooctane 162.15
    1-chlorotetradecane 91.25
    n-nonane 77.17
    undecane 61.63
    tert-butylcyclohexane 84.06
    cyclooctane 74.24
    cyclopentanol 814.12
    tetrahydropyran 734.74
    tert-amyl methyl ether 586.64
    2,5,8-trioxanonane 627.32
    1-hexene 280.18
    2-isopropoxyethanol 754.67
    2,2,2-trifluoroethanol 544.13
    methyl butyrate 365.9

    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