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Chromium trioxide information


Chromium trioxide
Ball-and-stick model of chromium trioxide
  Chromium, Cr
  Oxygen, O
Powder of chromium trioxide
Names
IUPAC name
Chromium trioxide
Other names
Chromic anhydride, Chromium(VI) oxide, Chromic acid (misnomer)
Identifiers
CAS Number
  • 1333-82-0 checkY
3D model (JSmol)
  • Interactive image
ChEBI
  • CHEBI:48240 checkY
ChemSpider
  • 14212 checkY
ECHA InfoCard 100.014.189 Edit this at Wikidata
PubChem CID
  • 14915
RTECS number
  • GB6650000
UNII
  • 8LV49809UC checkY
UN number 1463
CompTox Dashboard (EPA)
  • DTXSID0040125 Edit this at Wikidata
InChI
  • InChI=1S/Cr.3O checkY
    Key: WGLPBDUCMAPZCE-UHFFFAOYSA-N checkY
  • InChI=1/Cr.3O/rCrO3/c2-1(3)4
    Key: WGLPBDUCMAPZCE-YFSAMUSXAF
SMILES
  • O=[Cr](=O)=O
Properties
Chemical formula
CrO3
Molar mass 99.993 g·mol−1
Appearance Dark red granular solid, deliquescent
Odor Odorless
Density 2.7 g/cm3 (20 °C)[1]
Melting point 197 °C (387 °F; 470 K)[1]
Boiling point 250 °C (482 °F; 523 K)
decomposes[1]
Solubility in water
  • 164.8 g/(100 mL) (0 °C)
  • 169 g/(100 mL) (25 °C)[1]
  • 172.6 g/(100 mL) (40 °C)
  • 198.1 g/(100 mL) (100 °C)[2]
Solubility Soluble in H2SO4, HNO3, (CH3CH2)2O, CH3COOH, (CH3)2CO
Magnetic susceptibility (χ)
+40·10−6 cm3/mol[1]
Thermochemistry
Std molar
entropy (S298)
73.2 J/(mol·K)[3]
Std enthalpy of
formation fH298)
−589.3 kJ/mol[4]
Hazards
GHS labelling:
Pictograms
GHS03: OxidizingGHS05: CorrosiveGHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard[5]
Signal word
Danger
Hazard statements
H271, H301+H311, H314, H317, H330, H334, H335, H340, H350, H361f, H372, H410[5]
Precautionary statements
P210, P260, P280, P303+P361+P353, P304+P340+P310, P305+P351+P338[5]
NFPA 704 (fire diamond)
[6]
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 0: Will not burn. E.g. waterInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
4
0
2
OX
Lethal dose or concentration (LD, LC):
LD50 (median dose)
80 mg/kg (rats, oral)[6]
Safety data sheet (SDS) ICSC 1194
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)
Infobox references

Chromium trioxide (also known as chromium(VI) oxide or chromic anhydride) is an inorganic compound with the formula CrO3. It is the acidic anhydride of chromic acid, and is sometimes marketed under the same name.[6] This compound is a dark-purple solid under anhydrous conditions and bright orange when wet. The substance dissolves in water accompanied by hydrolysis.[clarification needed] Millions of kilograms are produced annually, mainly for electroplating.[7] Chromium trioxide is a powerful oxidiser, a mutagen, and a carcinogen.[8]

  1. ^ a b c d e Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
  2. ^ Seidell, Atherton; Linke, William F. (1919). Solubilities of Inorganic and Organic Compounds (2nd ed.). D. Van Nostrand Company. p. 250.
  3. ^ "chromium(VI) oxide". chemister.ru.
  4. ^ Pradyot, Patnaik (2003). Handbook of Inorganic Chemicals. The McGraw-Hill Companies, Inc. ISBN 0-07-049439-8.
  5. ^ a b c Sigma-Aldrich Co., Chromium(VI) oxide. Retrieved on 2021-11-22.
  6. ^ a b c "Chromium trioxide". chemicalland21.com. AroKor Holdings Inc. Retrieved 2014-06-15.
  7. ^ Anger, G.; Halstenberg, J.; Hochgeschwender, K.; Scherhag, C.; Korallus, U.; Knopf, H.; Schmidt, P.; Ohlinger, M. (2000). "Chromium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a07_067. ISBN 3527306730.
  8. ^ Mamyrbaev, Arstan Abdramanovich; Dzharkenov, Timur Agataevich; Imangazina, Zina Amangalievna; Satybaldieva, Umit Abulkhairovna (2015-04-16). "Mutagenic and carcinogenic actions of chromium and its compounds". Environmental Health and Preventive Medicine. 20 (3). Springer Science and Business Media LLC: 159–167. doi:10.1007/s12199-015-0458-2. ISSN 1342-078X. PMC 4434237. PMID 25877777.

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Chromium trioxide

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Chromium trioxide (also known as chromium(VI) oxide or chromic anhydride) is an inorganic compound with the formula CrO3. It is the acidic anhydride of...

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Chromic acid

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aqueous solutions of dichromate. It consists at least in part of chromium trioxide. The term chromic acid is usually used for a mixture made by adding...

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Trioxide

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structure. Carbon trioxide, CO3 Chromium trioxide, CrO3 Molybdenum trioxide, MoO3 Rhenium trioxide, ReO3 Selenium trioxide, SeO3 Sulfur trioxide, SO3 Tellurium...

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Chromium

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(ECHA), chromium trioxide that is used in industrial electroplating processes is a "substance of very high concern" (SVHC). Abandoned chromium production...

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Chromium oxide

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which includes the hypothetical compound chromium(II) chromate Chromium trioxide (chromium(VI) oxide), CrO3 Chromium(VI) oxide peroxide, CrO5 Mixed valence...

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Sarett oxidation

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secondary alcohols to aldehydes and ketones, respectively, using chromium trioxide and pyridine. Unlike the similar Jones oxidation, the Sarett oxidation...

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Oxidizing agent

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chlorine, bromine, and iodine Hexavalent chromium compounds such as chromic and dichromic acids and chromium trioxide, pyridinium chlorochromate (PCC), and...

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Chrome plating

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cases, the activation step is done in the chromium bath. The chromium bath is a mixture of chromium trioxide and sulfuric acid, the ratio of which varies...

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Molybdenum trioxide

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Molybdenum trioxide describes a family of inorganic compounds with the formula MoO3(H2O)n where n = 0, 1, 2. The anhydrous compound is produced on the...

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Acidic oxide

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[Fe(H2O)6]2+ → FeO + 2 H+ + 5 H2O Chromium trioxide is the anhydride of chromic acid: H2CrO4 → H2O + CrO3 Vanadium trioxide is the anhydride of vanadous acid:...

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Tungsten trioxide

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Tungsten(VI) oxide, also known as tungsten trioxide is a chemical compound of oxygen and the transition metal tungsten, with formula WO3. The compound...

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Potassium dichromate

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potassium chrome alum, used in leather tanning. Like other chromium(VI) compounds (chromium trioxide, sodium dichromate), potassium dichromate has been used...

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Jones oxidation

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Collins reagent. Jones reagent is a solution prepared by dissolving chromium trioxide in aqueous sulfuric acid. To effect a Jones oxidation, this acidic...

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Collins reagent

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is a hygroscopic orange solid. The complex is produced by treating chromium trioxide with pyridine. The complex is diamagnetic. According to X-ray crystallography...

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Hexavalent chromium

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hexavalent chromium compounds such as chromium trioxide and various salts of chromate and dichromate. Industrial uses of hexavalent chromium compounds...

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Alcohol oxidation

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details of the preparation of this solution, i.e., the addition of chromium trioxide to a solution of pyridine in methylene chloride. A second family of...

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Potassium bitartrate

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powders and baking mixes, as mordant in textile dyeing, as reducer of chromium trioxide in mordants for wool, as a metal processing agent that prevents oxidation...

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Pyridinium chlorochromate

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originally prepared via addition of pyridine into a cold solution of chromium trioxide in concentrated hydrochloric acid: C5H5N + HCl + CrO3 → [C5H5NH][CrO3Cl]...

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Deichmann SE

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produced under the company's own 5th Avenue brand being contaminated by chromium trioxide between 2012 and 2014. Deichmann SE is a member of the cads association...

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Group 6 element

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Louis Nicolas Vauquelin produced chromium trioxide by mixing crocoite with hydrochloric acid, and metallic chromium by heating the oxide in a charcoal...

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Cyclohexanone

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Cyclohexanone can be prepared from cyclohexanol by oxidation with chromium trioxide (Jones oxidation). An alternative method utilizes the safer and more...

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Polonium trioxide

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state. It has been predicted that polonium trioxide may be formed by heating polonium dioxide and chromium trioxide together in air. It is very difficult to...

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Sodium chromate

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acidification affords chromium trioxide: Na2CrO4 + H2SO4 → CrO3 + Na2SO4 + H2O Aside from its central role in the production of chromium from its ores, sodium...

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Benzyl group

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concentrated nitric acid (HNO3): (ArCHR2 → ArCOOH). Finally, the complex of chromium trioxide and 3,5-dimethylpyrazole (CrO3−dmpyz) will selectively oxidize a benzylic...

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Mesitaldehyde

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oxidation of mesitylene in acidic medium, typically using oxidants like chromium trioxide or potassium permanganate, followed by purification steps to isolate...

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Aldehyde

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1002/14356007.a11_619. Ratcliffe, R. W. (1988). "Oxidation with the Chromium Trioxide-Pyridine Complex Prepared in situ: 1-Decanal". Organic Syntheses;...

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Polyethylene

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temperatures and pressures. The first of these was a catalyst based on chromium trioxide discovered in 1951 by Robert Banks and J. Paul Hogan at Phillips Petroleum...

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