| http://www.w3.org/ns/prov#value | - Examples of suitable solvents include: hydrocarbons, which may be aliphatic or aromatic, such as benzene, toluene, xylene, hexane or heptane; ethers, such as diethyl ether, tetrahydrofuran or dioxane; amides, such as dimethylformna-nide, dimethylacetamide or hexamethylphosphoric triamide; halogenated hydrocarbons, such as methylene chloride, chloroform or 1,2-dichloroethane; nitrites, such as acet
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