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词汇 hexavalent
释义

Definition of hexavalent in English:

hexavalent

adjectiveˌhɛksəˈveɪl(ə)ntˌhɛksəˈveɪlənt
Chemistry
  • Having a valency of six.

    〔化〕六价的

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

Definition of hexavalent in US English:

hexavalent

adjectiveˌhɛksəˈveɪləntˌheksəˈvālənt
Chemistry
  • Having a valence of six.

    〔化〕六价的

    Example sentencesExamples
    • The chemicals which must be replaced by 2007 include lead, mercury, cadmium, hexavalent chromium and some flame retardants.
    • 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.
    • 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.
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