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Chromium trioxide

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Identification
Molecular formula
CrO3
CAS number
1333-82-0
IUPAC name
trioxochromium
State
State

Chromium trioxide is typically found as a solid at room temperature. It is often encountered in the form of flakes, grains, or powder. The solid is characterized by its vibrant color, which may vary slightly depending on the specific characteristics of the sample.

Melting point (Celsius)
197.00
Melting point (Kelvin)
470.00
Boiling point (Celsius)
250.00
Boiling point (Kelvin)
523.00
General information
Molecular weight
99.99g/mol
Molar mass
99.9940g/mol
Density
2.7000g/cm3
Appearence

Chromium trioxide appears as a dark purple or red amorphous solid at room temperature. It is hygroscopic and can form a green solution when dissolved in water due to formation of chromic acid. It generally looks crystalline and glossy.

Comment on solubility

Solubility of Trioxochromium

The solubility of trioxochromium, with the chemical formula CrO3, is an important characteristic to understand in a variety of chemical contexts. This compound is known to be highly soluble in water, which can be somewhat deceiving given its oxidative properties.

Key Points about Trioxochromium's Solubility:

  • Water Solubility: CrO3 readily dissolves in water, forming chromic acid (H2CrO4), which means that its ions can be readily mobilized in aqueous solutions.
  • Solvent Interaction: The high solubility is largely due to the polarity of the chromium-oxygen bond and the ability of water molecules to stabilize the resulting ions.
  • Impact on Acidity: The dissolution of trioxochromium leads to a decrease in pH, indicating an acidic environment, which is vital for various chemical reactions and processes.
  • Toxicity Considerations: While its high solubility allows for practical applications in laboratory and industrial settings, it's important to note that CrO3 exhibits toxic and carcinogenic properties, necessitating careful handling.

In summary, the solubility of trioxochromium in water is not only an interesting chemical property but also influences its behavior and utility in various applications. As noted, understanding the solubility characteristics of this compound helps chemists navigate its use safely and effectively. Always remember, "Soluble compounds can create complex solutions with significant chemical implications."

Interesting facts

Interesting Facts About Trioxochromium

Trioxochromium, a fascinating compound in the realm of coordination chemistry, exhibits remarkable characteristics that enhance its importance in various fields of science.

Key Features

  • Oxidation States: Trioxochromium typically exists in the +6 oxidation state, which makes it an effective oxidizing agent in many chemical reactions.
  • Coordination Complexes: This compound is known for forming coordination compounds with various ligands, making it versatile in both nature and synthetic applications.
  • Colorful Chemistry: Like many chromium compounds, trioxochromium displays vibrant colors, often used as pigments in paints and dyes.
  • Analytical Applications: It finds utility in analytical chemistry, particularly in spectroscopy, to detect certain ions through its distinctive absorption characteristics.

Historical Context

The study of trioxochromium has a rich history, dating back to the late 18th century with the isolation of chromium itself. Since then, researchers have continued to explore its properties and applications, quoting significant findings such as:

"The versatility of chromium in various oxidation states is a testament to its complexity and importance in inorganic chemistry." - Anonymous

Environmental Considerations

Despite its useful applications, trioxochromium should be handled with care due to its potential toxicity and environmental impact. The awareness of safe practices in its utilization is paramount for researchers and industries alike.

Overall, trioxochromium serves as a prime example of the intricate balance between utility and safety in the study of chemical compounds. Its unique properties and associations make it a compelling subject for further research and exploration.

Synonyms
Chromium trioxide
1333-82-0
Chromtrioxid
Monochromium trioxide
CrO3
CHROMIC TRIOXIDE
Anhydride chromique
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
DTXSID0040125
8LV49809UC
EC 215-607-8
(CrO3)
Monochromium oxide
Chromsaeure anhydrid
PURATRONIC
CHROMIUM (6+) TRIOXIDE
DTXCID8020125
CHROMICUM ACIDUM(CHROMIUM)
CHROMIUM TRIOXIDE, (ANHYDROUS)
215-607-8
chromicum acidum
chromium trioxide (mart.)
chromium vi oxide
trioxochromium
Chromic anhydride
Chromium(VI) oxide
chromium (VI) oxide
Chromsaeureanhydrid
65272-70-0
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
UN1463
Chromium(VI) oxide, CP
Epitope ID:158535
Chromium(VI) oxide, LR, >=99%
AKOS005259906
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)