perchloride

from WordNet (r) 3.0 (2006)

perchloride
    n 1: a chloride containing an unusually high proportion of
         chlorine

from The Collaborative International Dictionary of English v.0.48

Perchloride \Per*chlo"ride\, n. (Chem.)
   A chloride having a higher proportion of chlorine than any
   other chloride of the same substance or series.
   [1913 Webster]