persalt

A salt of which the basic element or radical presents a higher degree of apparent valence than the corresponding protosalt. Thus ferric sulphate (Fe₂(SO₄)₃) is spoken of as one of the persalts of iron, in contrast to ferrous sulphate (FeSO₄), the corresponding protosalt of the same metal.

A term formerly given to the salts supposed to be formed respectively by neutralizing acids with certain peroxides.

The form of a salt of a particular base / acid combination in which the base has the highest valency; i.e. the salt formally derived from a peroxide