| http://www.w3.org/ns/prov#value | - concentration of at least about 1.0 mg/L, of the formula: ##STR4## wherein n is an integer or fractional integer which is, or on average is, from about 2 to about 12, inclusive; M is hydrogen or an alkali metal; and each R may be the same or different and is independently selected from hydrogen and methyl; (B) an amount sufficient to establish a concentration of at least 2.0 mg/L of a composition
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