Petroleum ether is the petroleum fraction consisting of aliphatic hydrocarbons and boiling in the range 35‒60 °C; commonly used as a laboratory solvent. Despite the name,petroleum ether is not classified as an ether; the term is used only figuratively, signifying extreme lightness and volatility. It's generally used as a solvent in place of hexanes or pentane, it often becomes cheaper than either of those solvents because it's a mixture that hasn't been purified. It's also used as a solvent for cleaning glassware.
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