| http://www.w3.org/ns/prov#value | - The solvents are preferably alcohols such as methanol, ethanol, isopropanol (IPA), and n-butanol, but a mixed solvent thereof with a hydrocarbon solvent suchas hexane, heptane, or toluene; a halogenated hydrocarbon solvent such as methylene chloride or chlorobenzene; an ether such as diethylether, tetrahydrofuran, or 1,4-dioxane; or the like may also be used.
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