Chemistry of Chromium
It includes: reactions of chromium (III) ions in solution (summarised from elsewhere on the site); the interconversion of the various oxidation states of chromium; the chromate (VI)-dichromate (VI) …
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Chromium(III), Cytokines, and Hormones | SpringerLink
Definition. Chromium (III) is a transition metal, and its trivalent state is the form most prevalent in organic complexes (Vincent 2004; Cefalu and Hu 2004 ). Chromium (III) …
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Chromium
Chromium III is the most stable oxidation state (Greenwood and Earnshaw, 1997) and presumably is the form in the food supply due to the presence of reducing substances in foods. Even a bolus dose of 5 mg chromium VI was reduced to chromium III in 0.5 L of orange juice (Kuykendall et al., 1996), and endogenous reducing agents within the upper ...
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Chromium | Uses, Properties, & Facts | Britannica
Chromium, chemical element of Group 6 (VIb) of the periodic table, a hard steel-gray metal that takes a high polish and is used in alloys to increase strength and corrosion resistance. Chromium is a relatively abundant element in Earth's crust. Its name is from the Greek for color, for the colorations of its compounds.
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Chromium(III) oxide
Chromium (III) oxide is a precursor to the magnetic pigment chromium dioxide, by the following reaction: [7] Cr. 2O. 3 + 3 CrO. 3 → 5 CrO. 2 + O. 2. Along with many other oxides, it is used as a compound when polishing (also called stropping) the edges of knives, razors, surfaces of optical devices etc. on a piece of leather, balsa, cloth or ...
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Chromium Compound
Chromium. S.C. Gad, in Encyclopedia of Toxicology (Third Edition), 2014. Toxicokinetics. The toxicokinetics of a given chromium compound depend on the valence state of the chromium atom and the nature of its ligands. In contrast to chromium(III), which is bound to plasma proteins such as transferrins, chromium(VI) entering the blood stream is ...
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Chromium(II) chloride
Chromium (II) chloride is a chemical compound. Its chemical formula is CrCl 2. It is a white crystalline chemical. It dissolves in water to produce a bright blue solution. It is a strong reducing agent. If the water has a little acid in it, hydrogen is produced. If the water has a little base in it, chromium (II) oxide is produced.
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Chromium(III) and Transferrin | SpringerLink
'Chromium(III) and Transferrin' published in 'Encyclopedia of Metalloproteins' where Δε Cr is the molar absorptivity per bound chromium at 245 nm. Δε Cr can be determined by the slope of the linear portion of the curve in Fig. 2 at low Cr-to-transferrin ratios and is 7.94 × 10 3 M −1 cm −1.Fitting the data to gave the effective binding constants of K 1 = 1.42 × 10 …
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Chromium
Naturally occurring chromium is composed of three stable isotopes; 52 Cr, 53 Cr, and 54 Cr with 52 Cr being the most abundant (83.789% natural abundance). Nineteen radioisotopes have been characterized with the most stable being 50 Cr with a half-life of (more than) 1.8x10 17 years, and 51 Cr with a half-life of 27.7 days. All of the remaining …
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Chromium(III) nitrate
Chemical compound / From Wikipedia, the free encyclopedia. Chromium (III) nitrate describes several inorganic compounds consisting of chromium, nitrate and varying amounts of water. Most common is the dark violet hygroscopic solid. An anhydrous green form is also known. Chromium (III) nitrate compounds are of a limited commercial …
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Chromium
Chromium, as trivalent (+3) chromium, is a trace element that is naturally present in many foods and available as a dietary supplement. Chromium also exists as hexavalent …
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Chromium_nitrate
Infobox disclaimer and references. Chromium (III) nitrate is the chromium salt of nitric acid. This nitrate exists as a nona hydrate Cr (NO 3) 3 .9H 2 O. The anhydrous salt forms green crystals and very soluble in water. At 100 °C it decomposes. The hydrate has a red-violet color. Its melting point is 36–37 °C.
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Chromium(III) and Immune System | SpringerLink
Chromium (III) is an essential trace mineral that potentiates the action of insulin. A number of different chemical forms of chromium have been utilized as dietary chromium supplements. Various studies have reported beneficial effects of supplemental chromium on the immune system function as well as exacerbation of disease pathogenesis.
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Chromium(III) sulfate
Chromium (III) sulfate. Chromium (III) sulfate. Chromium (III) sulfate is a chemical compound. Its chemical formula is Cr 2 (SO 4) 3. It is a colored compound. It is made by dissolving chromium or chromium (III) oxide in sulfuric acid. It can also be made by reduction of chromates by sulfur dioxide. It turns green when heated.
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Chromium | Encyclopedia MDPI
Chromium (Cr) is a common element in the Earth’s crust. It may exist in different oxidation states, Cr(0), Cr(III) and Cr(VI), with Cr(III) and Cr(VI) being relatively stable and largely predominant. …
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Chromium(III)_oxide
Structure and properties. Cr 2 O 3 adopts the corundum structure, consisting of cubic close packed oxides with 2/3 of the octahedral holes occupied by chromium. It is an amphoteric oxide, dissolving in acids to give chromium(III) salts and in molten alkali to give chromites. Production. The Parisians Pannetier and Binet first prepared Cr 2 O 3 in 1838 via a …
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Chromium hydroxide (Cr(OH)3) | CrH6O3 | CID 14787
Chromium is a chemical element which has the symbol Cr and atomic number 24. It is found naturally occuring in rocks, animals, plants, and soil, and is usually mined as chromite ore. Chromium is most toxic in its +6 oxidation state ( chromium (VI)) due to its greater ability to enter cells and higher redox potential.
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Chromium(III)_oxide
Chromium(III) oxide is the inorganic compound of the formula Cr 2 O 3. It is one of principal oxides of chromium, it is widely used precursor to other chromium compounds.
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Chromium(II) oxide
Chromium (II) oxide is a chemical compound. It contains chromium in its +2 oxidation state. Its chemical formula is CrO. It reacts with oxygen when heated to produce chromium (III) oxide. It is a reducing agent. It is made by reduction of chromium (III) oxide by hypophosphites .
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Chromic nitrate nonahydrate | CrH18N3O18 | CID 9887206
The Merck Index, An Encyclopedia of Chemicals, Drugs, and Biologicals, 15th Ed. Cambridge, UK: The Royal Society of Chemistry, 2013. Haz-Map, Information on Hazardous Chemicals and Occupational Diseases. Industrial Processes with risk of exposure ... Chromium (III) nitrate, nonahydrate: Does not have an individual approval but may be …
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The bioinorganic chemistry of chromium(III)
The biochemistry of chromium (III) has been a poorly understood field of endeavor. Despite four decades of investigation, only recently has a somewhat clear picture of the role of Cr been refined. Chromium (III) is required for proper carbohydrate and lipid metabolism in mammals, although chromium deficiency is difficult to achieve.
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Chromium | History, Uses, Facts, Physical & Chemical …
Large number of chromium [III] compounds are present, such as compound of chromium with sulfuric and hydrochloric acid. Chromium (VI) compounds, including chromate anion (CrO4 2- ), are powerful oxidizing agents. …
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Chromium nitrate
Chromium (III) nitrate is the chromium salt of nitric acid. This nitrate exists as a nona hydrate Cr (NO 3) 3 .9H 2 O. The anhydrous salt forms green crystals and very soluble in water. At 100 °C it decomposes. The hydrate has a red-violet color. Its melting point is 36–37 °C. Chromium nitrate is used in the production of alkali metal -free ...
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Chromium(III) acetate | C6H9CrO6 | CID 14012
Chromium is a chemical element which has the symbol Cr and atomic number 24. It is found naturally occuring in rocks, animals, plants, and soil, and is usually mined as chromite ore. Chromium is most toxic in its +6 …
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Chromium Picolinate: Benefits, Side Effects, and More
Chromium has been studied for its effect on blood sugar control for diabetes, depression, body composition, weight loss, polycystic ovary syndrome (PCOS), and more. This article covers chromium picolinate's potential health benefits and side effects. In the United States, the Food and Drug Administration (FDA) does not regulate …
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Chromium(III) sulfide
^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0141". National Institute for Occupational Safety and Health (NIOSH). ^ Georg Brauer: Handbuch der präparativen anorganischen Chemie. 3., umgearb. Auflage. Band III. Enke, Stuttgart 1981, ISBN 3-432-87823-0, S. 1493 ^ Jellinek, F. "The structures of the Chromium Sulphides" Acta …
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Chromium(III)_chloride
Chromium(III) chloride (also called chromic chloride) is a violet coloured solid with the formula CrCl 3.. Although it is ionic, the solid state structure is kinetically inert so that anhydrous CrCl 3 is surprisingly reluctant to dissolve in water. However, in the presence of a trace of a reducing agent capable of reducing Cr 3+ to Cr 2+, the CrCl 3 dissolves …
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Chemistry of Chromium
This page looks at some aspects of chromium chemistry. It includes: reactions of chromium (III) ions in solution (summarised from elsewhere on the site); the interconversion of the various oxidation states …
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Chromium
Chromium (chemical symbol Cr, atomic number 24) is a hard, shiny, steel-gray metal that takes a high polish and does not tarnish. It is therefore used in alloys, such as stainless steel, and in chrome plating.The human body needs trace amounts of trivalent chromium (chromium(III)) for sugar metabolism, but hexavalent chromium (chromium(VI)) is very …
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Chromium(III)_picolinate
Chromium picolinate is the chemical compound that is sold as a nutritional supplement to prevent or treat chromium deficiency. This bright-red coordination complex is derived from chromium (III) and picolinic acid. Small quantities of chromium are needed for glucose utilization by insulin in normal health, but deficiency is extremely rare in ...
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