| http://www.w3.org/ns/prov#value | - Aliphatic hydrocarbons such as alkanes, including cycloalkanes and halogenated alkanes are suitable; preferred alkanes have a minimum of five carbon atoms; preferred halogenated alkanes have a minimum of two carbon atoms; aromatic hydrocarbons which can be used include benzene, and substituted products such as toluenes, xylenes and cumene.
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