prov:value
| - There are no particular restrictions on volatile agents, and examples include methane, ethane, propane, butane, isobutane, isobutene, pentane, isopentane, neopentane, hexane, neohexane, heptane, acetylene and other hydrocarbons, trichlorofluoromethane, dichlorodifluoromethane and other halogenated hydrocarbons and tetraalkylsilanes and other low boiling compounds.
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