hexavalent's Usage Examples:

The message was clear change from the carcinogenic hexavalent form to less hazardous trivalent form where possible or face increasing restrictions and controls.

: C, Si, Ge, Zr, Th, tetravalent; Ti, tetravalent and hexavalent; Sn, Pb, divalent and tetravalent; Ce, trivalent and tetravalent.

hexavalent chromium will be banned from vehicle components by 1 January 2003.

On heavy metals: lead, mercury, cadmium and hexavalent chromium will be banned from vehicle components by 1 January 2003.

hexavalent chrome which currently ends up in the foul sewer or in the exhaust from the stack.

hexavalent chromium compounds in a number of in vitro tests in bacteria.

: 0, usually divalent, but tetravalent and possibly hexavalent in oxonium and other salts; S, Se, Te, di-, tetraand hexa-valent; Cr, di-, triand hexa-valent; Mo, W, di-, tri-, tetra-, pentaand hexa-valent.

For example, one study found hexavalent chromium in a product which is the toxic and carcinogenic form of the mineral.

: Fe, Co, divalent and trivalent; Ni, divalent; Os, Ru, hexavalent and octavalent; Pd, Pt, divalent and tetravalent; Ir, tri-, tetraand hexa-valent.

hexavalent form of chromium (Cr 6+) is more toxic, it is not normally found in food.