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Petroleum ether
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== Standards == [[Ligroin]] is assigned the CAS Registry Number 8032-32-4, which is also applied to many other products, particularly those with low boiling points, called [[petroleum spirit (disambiguation)|petroleum spirit]], petroleum ether, and [[petroleum benzine]]. "[[Naphtha]]" has the CAS Registry Number 8030-30-6, which also covers petroleum benzine and petroleum ether: that is, the lower boiling point non-aromatic hydrocarbon solvents.<ref name="phenix" /> DIN 51630 provides for petroleum spirit (also called spezialbenzine or petrolether) which is described as "a special boiling-point spirit (SBPS) commonly used in laboratory applications, having high volatility and low aromatics content." Its initial boiling point is above 25 Β°C, its final boiling point up to 80 Β°C.<ref name="phenix" />
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