| http://www.w3.org/ns/prov#value | - Other ingredients which may be present in the tablets of the invention include water-softening or chelating agents, for example inorganic water-softening agents such as sodium hexametaphosphate or other alkali metal polyphosphates or organic water-softening agents such as the salts of ethylenediaminetetraacetic acid and nitrilotriacetic acid and other alkali metal salts thereof.
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