1. having a valence of six; capable of combining with six atoms of hydrogen or their equivalent
Usage: chemistry; technical
2. of or relating to chromium or other elements in their +6 oxidation state
Usage: chemistry; technical

Examples

• Hexavalent chromium is a known carcinogen and is heavily regulated in industrial settings.
• The hexavalent form of sulfur can be found in certain mineral compounds.
• Hexavalent ions have a charge of +6 or −6 depending on the element.
• Water treatment plants must remove hexavalent chromium to meet safety standards.
• The hexavalent state is less stable than the trivalent state for some transition metals.