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Cr 3 pp(1) - Chromium 2011"Source...

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Chromium 2011 "Source: WebElements [http://www.webelements.com/]" Chromium: Discovery of Essentiality Time Line of Discovery 1959 1957-1967 1977 Schwarz and Mertz discover a chromium compound restored glucose tolerance in animals by enhancing the action of insulin Malnourished children with impaired glucose tolerance given chromium = improved glucose tolerance Female on TPN who developed signs of diabetes given chromium = symptoms ameliorated Chromium: Chemistry Chromium is a transition element – Can occur in a number of valence states 3+ and 6+ most common • Cr 6+ is strong oxidizing agent from industrial sources Cr • Cr 6+ consumed in small quantities – reduced to Cr 3+ in stomach Cr 3+ = Most important form in humans
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