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| | Chromium Compounds | Technology Transfer Network Air Toxics Web site | US EPA |
 | | Chromium compounds, in either the chromium (III) or chromium (VI) forms, are used for chrome plating, the manufacture of dyes and pigments, leather and wood preservation, and treatment of cooling tower water. |
 | | Chromium occurs in the environment predominantly in one of two valence states: trivalent chromium (Cr III), which occurs naturally and is an essential nutrient, and hexavalent chromium (Cr VI), which, along with the less common metallic chromium (Cr 0), is most commonly produced by industrial processes. |
 | | Chromium compounds are stable in the trivalent state, with the hexavalent form being the second most stable state. |
| www.epa.gov /ttn/atw/hlthef/chromium.html (2214 words) |
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