Chromic acid

Base Information

• Chemical Name: Chromic acid
• CAS No.: 7738-94-5
• Deprecated CAS: 11115-74-5,24934-60-9,9044-10-4,199384-58-2,237391-94-5,199384-58-2,237391-94-5,24934-60-9,9044-10-4
• Molecular Formula: CrH2O4
• Molecular Weight: 118.009
• European Community (EC) Number: 231-801-5
• UN Number: 1755,1463
• UNII: SA8VOV0V7Q
• DSSTox Substance ID: DTXSID8034455
• Wikipedia: Chromic acid
• Wikidata: Q422642
• Mol file: 7738-94-5.mol

Synonyms:chromic acid;dichromic acid

Chemical Property of Chromic acid

Chemical Property:

• Appearance/Colour: dark purplish red solid
• Melting Point: 196 °C (dec.)(lit.)
• Boiling Point: 330oC
• Flash Point: 250oC
• PSA: 74.60000
• Density: 2.290
• LogP: -0.59120
• Water Solubility.: HIGHLY Soluble
• Hydrogen Bond Donor Count: 2
• Hydrogen Bond Acceptor Count: 4
• Rotatable Bond Count: 0
• Exact Mass: 117.935813
• Heavy Atom Count: 5
• Complexity: 81.3

Purity/Quality:

99% ^*data from raw suppliers

ChromicAcid ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Metals -> Chromium Compounds, Inorganic
• Canonical SMILES: O[Cr](=O)(=O)O
• Description: Chromic acid, CrO3, is composed of dark, purplish-red, odorless crystals that are soluble in water. The specific gravity is 2.7, which is heavier than water. It is a powerful oxidizing agent and may explode on contact with organic materials. Chromic acid is a poison, corrosive to the skin, and has a TLV of 0.05 mg/m3 of air. Chromic acid is a known human carcinogen. The four-digit UN identification number is 1463. The NFPA 704 designation is health 3, flammability 0, and reactivity 1. The white section at the bottom of the 704 diamond has an “oxy” prefix, indicating that it is an oxidizer.
• Uses: Chemicals (chromates, oxidizing agents, catalysts), chromium-plating intermediate, medicine (caustic), process engraving, anodizing, ceramic glazes, colored glass, metal cleaning, inks, tanning, paints, textile mordant, etchant for plastics.

Technology Process of Chromic acid

There total 49 articles about Chromic acid which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 93.4%

chromium(III) sulfate → chromic acid (7738-94-5,9044-10-4)

Guidance literature:

With sodium plumbate; In water; soln. of sodium plumbate hydrolyzed at 70-80°C, washed and cooked with Cr2(SO4)3;

Reference yield:

dichromic acid (13530-68-2) → chromic acid (7738-94-5,9044-10-4)

Guidance literature:

With water; In water; equil. react.;;

Reference yield:

chromyl fluoride (7788-96-7) → chromic acid (7738-94-5,9044-10-4)

Guidance literature:

With water; In water; byproducts: HF; hydrolysis;;

DOI:10.1021/ja01141a007

upstream raw materials:

sulfuric acid

water

chromium(VI) oxide

dichromic acid

Downstream raw materials:

chromium

bromine

chromate(VI) ion

ozone

Refernces

• 1、 Mills, Andrew,Sawunyama, Phillip. "Oxidative Dissolution of Chromium(III) Oxides by Metaperiodate Ions in Perchloric Acid". . p. 3389 - 3394. Retrieved 1993.
• 2、 Engelbrecht, A.,Grosse, A. V.. "". . . Retrieved 1953.
• 3、 Dehn, W. M.. "". . p. 829 - 847. Retrieved 1914.
• 4、 -. "PROCESS FOR PREPARING (S)-PRAMIPEXOLE AND ITS INTERMEDIATES". Page/Page column 16. . Retrieved 2008/06/13.