Definition of "hexavalent" []

• Having a valence of 6 (adjective)

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• "The soldiers were stationed there for months before being informed that the site was contaminated with a chemical known as hexavalent chromium."
• "It contained heavy concentrations of a carcinogen called hexavalent chromium."
• "The suite suit alleges that KBR knowingly allowed exposure to the toxic chemical sodium dichromate, also known as hexavalent chromium."