"Petroleum ether" is a misnomer, as it is not actually an ether. It is a mixture of volatile, highly flammable hydrocarbons, primarily pentane and hexane. There is no universally accepted standard for the boiling range of "petroleum ether," and the composition can vary depending on the manufacturer and intended application.

However, it's common to see petroleum ether described with these boiling point ranges:

Light Petroleum Ether:

* Boiling range: 30-60°C (86-140°F)

* Primarily contains pentanes and hexanes.

Heavy Petroleum Ether:

* Boiling range: 60-80°C (140-176°F)

* Primarily contains hexanes and heptanes.

Other common boiling ranges:

* 40-60°C (104-140°F)

* 50-70°C (122-158°F)

* 60-70°C (140-158°F)

* 65-75°C (149-167°F)

It's important to always check the specific boiling range provided by the manufacturer for the petroleum ether you are using. This information is critical for proper handling, storage, and application.