Chromium
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Chromium is a chemical element; it has symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal.
Chromium crystals and 1cm 3 cube
"Chrome plated" motorcycle parts, plated with a decorative layer of chromium
Sample of chromium metal
Anhydrous chromium(III) chloride (CrCl3
Hexavalent chromium
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Hexavalent chromium is any chemical compound that contains the element chromium in the +6 oxidation state. It has been identified as carcinogenic, which is of concern since approximately 136,000 tonne
Chromium
…to be recognized as an essential nutrient. While chromium metal and Cr(III) ions are considered non-toxic, chromate and its derivatives, often called "hexavalent chromium", is toxic and carcinogenic. According to the European Chemicals Agency (ECHA), chromium trioxide that is used in industrial electroplating processes…
The most common chromium(VI) compound: sodium chromate