hexavalent

Modifies a noun

• chromium: On heavy metals: lead, mercury, cadmium and hexavalent chromium will be banned from vehicle components by 1 January 2003.
• compound: Positive results had been documented for hexavalent chromium compounds in a number of in vitro tests in bacteria.
• chrome: That is hexavalent chrome which currently ends up in the foul sewer or in the exhaust from the stack.
• form: Although the hexavalent form of chromium ( Cr 6+ ) is more toxic, it is not normally found in food.