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Chromium (VI) Oxide (CrO₃)

Chromium (VI) Oxide (CrO₃), also known as chromium(VI) oxide, chromic anhydride appears as dark red rhombic crystals or purple-red flakes which are soluble in water. It is also sometimes referred to as Chromic acid, H₂CrO₄; however, the acid exists only in solution. Chromium (VI) Oxide is also soluble in alcohol, sulfuric acid, and ether. It is highly reactive upon contact with reducing reagents and can cause an explosion. It is a powerful oxidizing agent, violently oxidizing organic matter that may lead to ignition, and is explosive in contact with acetone and other alcohols. It is a confirmed human carcinogen.

Purities are available from 99% to 99.999%.
Typical Applications

Chromium(VI) oxide is used for chromium plating, copper stripping, and as a corrosion inhibitor. It is used as the main raw material for electroplating used in making bicycles, sewing machines, watches, meters, flashlights, and household hardware. It also is the main ingredient in the manufacturing of high-purity metal chromium. It is used as a mordant in wool fabric dyeing, as an oxidant in the printing and dyeing industry, and also used as a wood preservative. It also is used as an oxidizing agent for the conversion of secondary alcohols into ketones (Jones oxidation) and in ‘chromic mixtures’ for cleaning laboratory glassware.

Packaging Options

Shipped only in steel drums


Chromium (VI) Oxide TSCA (SARA Title III) Status: Listed
Please contact the EPA Office of Chemical Safety and Pollution Prevention (OCSPP) at 202-564-2902.
NIOSH Cancer Site- lung cancer
NIOSH Pocket Guide To Chemical Hazards- Chromic acid Courtesy External Link
Chromium (VI) Oxide CAS Number: 1333-82-0, 1308-38-9
Chromic Acid CAS Number: 7738-94-5
Chromic Acid UN Number: 1463

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  • -20 Mesh
  • 5 Microns Avg. or Less
  • Flakes
  • Liquid Chromic Acid (35%)
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