adjective

• Having a valency of six.

  ‘More than 95 percent of leather produced in the U.S. is tanned using trivalent and/or hexavalent chromium, the latter of which is an EPA-recognized carcinogen.’

  More example sentences

  • ‘Chromium occurs in both trivalent and hexavalent (Cr VI) forms.’
  • ‘Zinc-based materials and polymers are replacing hexavalent chromium.’
  • ‘There is a growing acceptance that industry will adopt trivalent chromium as an intermediate solution to the replacement of hexavalent chromium.’
  • ‘The chemicals which must be replaced by 2007 include lead, mercury, cadmium, hexavalent chromium and some flame retardants.’