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Hexavalent chromium information


The most common chromium(VI) compound: sodium chromate

Hexavalent chromium (chromium(VI), Cr(VI), chromium 6) is any chemical compound that contains the element in the +6 oxidation state (thus hexavalent).[1] It has been identified as carcinogenic, which is of concern since approximately 136,000 tonnes (150,000 tons) of hexavalent chromium were produced in 1985.[2] Hexavalent chromium compounds can be carcinogens (IARC Group 1), especially if airborne and inhaled where they can cause lung cancer.

  1. ^ "CHROMIUM (VI) COMPOUNDS" (PDF). IARC. June 2018. Retrieved 27 December 2023.
  2. ^ Anger, Gerd; Halstenberg, Jost; Hochgeschwender, Klaus; Scherhag, Christoph; Korallus, Ulrich; Knopf, Herbert; Schmidt, Peter; Ohlinger, Manfred (2000). Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a07_067. ISBN 978-3527306732.

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Hexavalent chromium

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Hexavalent chromium (chromium(VI), Cr(VI), chromium 6) is any chemical compound that contains the element in the +6 oxidation state (thus hexavalent)....

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Chromium toxicity

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chromium—especially hexavalent chromium. Hexavalent chromium and its compounds are toxic when inhaled or ingested. Trivalent chromium is a trace mineral...

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Chromium

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evidence for chromium to be recognized as essential. While chromium metal and Cr(III) ions are considered non-toxic, hexavalent chromium, Cr(VI), is toxic...

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Chrome plating

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Trivalent chromium plating is an alternative to hexavalent chromium in certain applications and thicknesses (e.g. decorative plating). A trivalent chromium plating...

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Erin Brockovich

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alleged contamination of drinking water with hexavalent chromium (also written as "chromium 6", "chromium VI", "Cr-VI" or "Cr-6") in the town. At the center...

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Hinkley groundwater contamination

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about 120 miles north-northeast of Los Angeles. PG&E used chromium 6, or hexavalent chromium (a cheap and efficient rust suppressor), in its compressor...

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Potassium dichromate

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agent in various laboratory and industrial applications. As with all hexavalent chromium compounds, it is acutely and chronically harmful to health. It is...

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Garfield Groundwater Contamination Superfund site

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to Garfield residents in the area due to exposure to hexavalent chromium, a toxic form of chromium. The site was designated a Superfund site in 2011. Cleanup...

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Chromite

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production. Environmental contamination with hexavalent chromium is a major health and environmental concern. Chromium is most stable in its trivalent (Cr(III))...

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Orica

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hexavalent chromium were present at Stockton" (Press release). Office of Environment & Heritage. 15 February 2012. "Orica welcomes revised Chromium VI...

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Chromium trioxide

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coatings of all types. Chromium trioxide is highly toxic, corrosive, and carcinogenic. It is the main example of hexavalent chromium, an environmental hazard...

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Chromate conversion coating

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bath, about 23% of the chromium atoms were found to be hexavalent Cr6+ , except in a region close to the metal. These chromium(VI) residues can migrate...

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Chromate and dichromate

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dichromate mineral. Hexavalent chromium compounds can be toxic carcinogenic (IARC Group 1). Inhaling particles of hexavalent chromium compounds can cause...

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Group 6 element

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oxidation states for chromium are zero, trivalent, and hexavalent states. Most naturally occurring chromium is in the hexavalent state. About two-fifths...

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Pacific Gas and Electric Company

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animals, Hexavalent Chromium has also been linked to cancer when ingested". Previously, when older chromium MCLs were set, "at the time Total Chromium MCLs...

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Oxidizing agent

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Fluorides of chlorine, bromine, and iodine Hexavalent chromium compounds such as chromic and dichromic acids and chromium trioxide, pyridinium chlorochromate...

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Plating

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exists as chromic acid, known as hexavalent chromium. A high current is used, in part to stabilize a thin layer of chromium(+2) at the surface of the plated...

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Cornforth reagent

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and functions it is closely related to other compounds made from hexavalent chromium oxide, such as pyridinium chlorochromate and Collins reagent. Because...

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Chromium cycle

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conditions: trivalent chromium, Cr(III) (reduced form), and hexavalent chromium, Cr(VI) (most oxidized form). The poorly soluble trivalent chromium cation (Cr3+...

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Bioremediation

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Microorganisms can be used to lower the toxicity and mobility of chromium by reducing hexavalent chromium, Cr(VI) to trivalent Cr(III). Reduction of the more mobile...

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Drinking water quality in the United States

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chemical causing adverse health issues is through a well-known hexavalent chromium (chromium 6) pollution event in Hinkley, California. Groundwater contamination...

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Ammonium dichromate

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as in all chromates and dichromates, chromium is in a +6 oxidation state, commonly known as hexavalent chromium. It is a salt consisting of ammonium ions...

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