Chromium Trioxide

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  • Identifiers

    CAS number
    1333-82-0

    Molecular formula
    CrO3

    SMILES
    O=[Cr](=O)=O

    Safety labels

    Oxidizer
    Oxidizer

    Corrosive
    Corrosive

    Acute Toxic
    Acute Toxic

    Irritant
    Irritant

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Odorless 89.49%
    Sour 20.8%
    Burnt 19.9%
    Sharp 17.94%
    Pungent 14.45%
    Caramellic 12.72%
    Clean 12.0%
    Bitter 9.78%
    Ethereal 9.44%
    Sweet 8.67%

     

  • Properties

    pKa est.
    -23.68 (strong acid)

    Molecular weight
    99.994 g/mol

    Melting point expt.

    • 385 °F (NTP, 1992)
    • 197 °C
    • 387 °F (Decomposes)

    Boiling point

    • 482 °F at 760 mmHg (decomposes) (NTP, 1992)
    • Approximately 250 °C decomposes
    • 482 °F (Decomposes)

    Flash point

    • -29.71 ˚C est.

    Solubility expt.

    • Very soluble (NTP, 1992)
    • Solubility in water, 61.7 g/100 cc solution at 0 °C; 67.45 g/100 cc solution at 100 °C
    • In water, 169 g/100 g water at 25 °C
    • In water, 1667 g/L (EU Method A.6 (Water Solubility))
    • In water, 167.299 lb/100 lb water at 70 °F
    • Soluble in ethyl alcohol, ethyl ether, sulfuric and nitric acids
    • For more Solubility (Complete) data for CHROMIC TRIOXIDE (6 total), please visit the HSDB record page.
    • Solubility in water, g/100ml: 61.7 (good)
    • 63%

  • Synonyms

    • Chromium trioxide
    • 1333-82-0
    • trioxochromium
    • Chromic anhydride
    • Chromium(VI) oxide
    • Chromtrioxid
    • Monochromium trioxide
    • CrO3
    • CHROMIC TRIOXIDE
    • Anhydride chromique
    • chromium (VI) oxide
    • Chromsaeureanhydrid
    • Chrom(VI)-oxid
    • Chromium(6+) oxide
    • Chromium(VI) trioxide
    • trioxyde de chrome
    • Chromium trioxide, sintered
    • Red oxide of chromium
    • Chroomtrioxyde
    • Chromium(6+) trioxide
    • Anidride cromica
    • Sintered chromium trioxide
    • Chroomzuuranhydride
    • Puratronic chromium trioxide
    • CCRIS 160
    • Cromo(triossido di)
    • HSDB 518
    • Chrome (trioxyde de)
    • CHEBI:48240
    • EINECS 215-607-8
    • Chromium trioxide, anhydrous
    • [CrO3]
    • UNII-8LV49809UC
    • 65272-70-0
    • DTXSID0040125
    • 8LV49809UC
    • EC 215-607-8
    • (CrO3)
    • Chromium anhydride
    • Sulfuric acid, mixt. with chromium oxide (CrO3)OTHER CA INDEX NAMES:Chromium oxide (CrO3), mixt. contg.
    • Chromia (CrO3)
    • Chromtrioxid [German]
    • Chroomtrioxyde [Dutch]
    • MFCD00010952
    • Anidride cromica [Italian]
    • Chroomzuuranhydride [Dutch]
    • Chromium oxide (Cr4O12)
    • Chromsaeureanhydrid [German]
    • Chromium(VI) oxide (1:3)
    • Cromo(triossido di) [Italian]
    • Chrome (trioxyde de) [French]
    • Chrormic trioxide
    • Monochromium oxide
    • Chromsaeure anhydrid
    • UN1463
    • PURATRONIC
    • Chromium(VI) oxide, CP
    • Epitope ID:158535
    • CHROMIUM (6+) TRIOXIDE
    • DTXCID8020125
    • CHROMICUM ACIDUM(CHROMIUM)
    • Chromium(VI) oxide, LR, >=99%
    • AKOS005259906
    • CHROMIUM TRIOXIDE, (ANHYDROUS)
    • Chromium(VI) oxide, p.a., 98.0%
    • BP-30107
    • Chromium(VI) oxide, technical grade, 95%
    • NS00075652
    • Chromium(VI) oxide, ACS reagent, >=98.0%
    • Chromium(VI) oxide, 99.99% trace metals basis
    • Chromium(VI) oxide, SAJ first grade, >=95.0%
    • Q931335
    • Chromium trioxide, anhydrous [UN1463] [Oxidizer]
    • Chromium(VI) oxide, SAJ special grade, >=98.0%
    • Chromium(VI) oxide, ReagentPlus(R), 99.9% trace metals basis
    • Chromium(VI) oxide, puriss. p.a., ACS reagent, >=99.0% (RT)
    • 215-607-8

  • Applications

    Chromium Trioxide (CAS 1333-82-0) is predominantly used as a strong oxidizer in metal surface treatment and protective coatings, including chrome plating baths and chromic acid-based anodizing processes for aluminum and steel to improve adhesion and corrosion resistance; it also serves as an oxidizing agent in organic synthesis (e.g., Jones oxidation) to oxidize primary and secondary alcohols to carbonyl compounds and carboxylic acids; in cleaning and pretreatment steps, chromic acid baths are used for surface cleaning and etching of metals and glass prior to coatings or bonding; it is a key intermediate/precursor in the production of chromium-containing chemicals and related reagents; use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 462.76
    methanol 655.81
    isopropanol 404.51
    water 168.51
    ethyl acetate 153.74
    n-propanol 309.14
    acetone 364.82
    n-butanol 277.98
    acetonitrile 247.91
    DMF 930.13
    toluene 73.93
    isobutanol 203.24
    1,4-dioxane 278.48
    methyl acetate 167.92
    THF 447.28
    2-butanone 209.65
    n-pentanol 183.16
    sec-butanol 293.46
    n-hexane 65.85
    ethylene glycol 335.61
    NMP 409.41
    cyclohexane 65.39
    DMSO 906.99
    n-butyl acetate 80.19
    n-octanol 128.9
    chloroform 222.86
    n-propyl acetate 95.66
    acetic acid 247.96
    dichloromethane 245.54
    cyclohexanone 154.96
    propylene glycol 236.38
    isopropyl acetate 112.23
    DMAc 529.86
    2-ethoxyethanol 326.36
    isopentanol 194.4
    n-heptane 57.75
    ethyl formate 149.99
    1,2-dichloroethane 200.68
    n-hexanol 161.15
    2-methoxyethanol 647.74
    isobutyl acetate 53.38
    tetrachloromethane 86.35
    n-pentyl acetate 90.67
    transcutol 284.49
    n-heptanol 124.94
    ethylbenzene 51.59
    MIBK 127.46
    2-propoxyethanol 277.31
    tert-butanol 429.63
    MTBE 241.67
    2-butoxyethanol 192.91
    propionic acid 167.36
    o-xylene 75.61
    formic acid 288.73
    diethyl ether 309.53
    m-xylene 70.52
    p-xylene 55.49
    chlorobenzene 69.16
    dimethyl carbonate 142.16
    n-octane 34.59
    formamide 437.88
    cyclopentanone 229.17
    2-pentanone 206.67
    anisole 114.47
    cyclopentyl methyl ether 216.26
    gamma-butyrolactone 225.83
    1-methoxy-2-propanol 465.74
    pyridine 161.84
    3-pentanone 156.01
    furfural 232.44
    n-dodecane 27.23
    diethylene glycol 335.21
    diisopropyl ether 114.85
    tert-amyl alcohol 309.99
    acetylacetone 170.65
    n-hexadecane 28.59
    acetophenone 98.72
    methyl propionate 172.24
    isopentyl acetate 66.3
    trichloroethylene 191.46
    n-nonanol 114.12
    cyclohexanol 185.61
    benzyl alcohol 107.92
    2-ethylhexanol 88.19
    isooctanol 91.91
    dipropyl ether 131.49
    1,2-dichlorobenzene 74.5
    ethyl lactate 93.02
    propylene carbonate 118.72
    n-methylformamide 402.66
    2-pentanol 236.14
    n-pentane 107.02
    1-propoxy-2-propanol 195.94
    1-methoxy-2-propyl acetate 102.2
    2-(2-methoxypropoxy) propanol 134.56
    mesitylene 57.81
    ε-caprolactone 130.81
    p-cymene 46.64
    epichlorohydrin 258.88
    1,1,1-trichloroethane 140.08
    2-aminoethanol 354.81
    morpholine-4-carbaldehyde 358.44
    sulfolane 333.36
    2,2,4-trimethylpentane 39.83
    2-methyltetrahydrofuran 265.41
    n-hexyl acetate 107.82
    isooctane 34.17
    2-(2-butoxyethoxy)ethanol 183.1
    sec-butyl acetate 63.57
    tert-butyl acetate 129.41
    decalin 28.34
    glycerin 361.18
    diglyme 284.23
    acrylic acid 159.02
    isopropyl myristate 63.26
    n-butyric acid 176.68
    acetyl acetate 80.0
    di(2-ethylhexyl) phthalate 55.84
    ethyl propionate 101.55
    nitromethane 340.59
    1,2-diethoxyethane 130.47
    benzonitrile 82.64
    trioctyl phosphate 55.26
    1-bromopropane 157.23
    gamma-valerolactone 243.31
    n-decanol 92.1
    triethyl phosphate 57.07
    4-methyl-2-pentanol 126.18
    propionitrile 167.07
    vinylene carbonate 106.46
    1,1,2-trichlorotrifluoroethane 228.7
    DMS 79.73
    cumene 44.71
    2-octanol 104.82
    2-hexanone 110.67
    octyl acetate 78.01
    limonene 66.26
    1,2-dimethoxyethane 396.26
    ethyl orthosilicate 59.23
    tributyl phosphate 52.93
    diacetone alcohol 198.72
    N,N-dimethylaniline 124.87
    acrylonitrile 191.74
    aniline 119.54
    1,3-propanediol 377.21
    bromobenzene 63.58
    dibromomethane 199.44
    1,1,2,2-tetrachloroethane 204.99
    2-methyl-cyclohexyl acetate 63.55
    tetrabutyl urea 85.25
    diisobutyl methanol 72.24
    2-phenylethanol 97.53
    styrene 58.39
    dioctyl adipate 74.12
    dimethyl sulfate 222.32
    ethyl butyrate 74.6
    methyl lactate 174.02
    butyl lactate 85.11
    diethyl carbonate 56.34
    propanediol butyl ether 167.76
    triethyl orthoformate 66.72
    p-tert-butyltoluene 52.03
    methyl 4-tert-butylbenzoate 123.02
    morpholine 328.17
    tert-butylamine 297.65
    n-dodecanol 75.84
    dimethoxymethane 534.74
    ethylene carbonate 90.53
    cyrene 124.97
    2-ethoxyethyl acetate 97.93
    2-ethylhexyl acetate 56.83
    1,2,4-trichlorobenzene 82.49
    4-methylpyridine 149.19
    dibutyl ether 95.71
    2,6-dimethyl-4-heptanol 72.24
    DEF 267.57
    dimethyl isosorbide 170.89
    tetrachloroethylene 166.73
    eugenol 135.99
    triacetin 93.38
    span 80 125.91
    1,4-butanediol 173.18
    1,1-dichloroethane 175.59
    2-methyl-1-pentanol 131.01
    methyl formate 282.65
    2-methyl-1-butanol 182.37
    n-decane 40.04
    butyronitrile 154.88
    3,7-dimethyl-1-octanol 90.13
    1-chlorooctane 77.13
    1-chlorotetradecane 41.9
    n-nonane 41.7
    undecane 32.19
    tert-butylcyclohexane 29.44
    cyclooctane 34.81
    cyclopentanol 236.27
    tetrahydropyran 220.84
    tert-amyl methyl ether 208.71
    2,5,8-trioxanonane 219.29
    1-hexene 100.37
    2-isopropoxyethanol 216.12
    2,2,2-trifluoroethanol 152.01
    methyl butyrate 118.71

    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