Kerosene, also known as paraffin oil, is a flammable hydrocarbon liquid derived from petroleum. It is primarily utilized as a fuel in various applications due to its efficient energy properties and relative affordability. Historically, kerosene has played a vital role in lighting homes and streets before the advent of electricity, as it was commonly used in oil lamps.

Today, kerosene is still widely used for a variety of purposes. One of its main applications is as a fuel for jet engines in airplanes, where its high energy density makes it an ideal choice. Additionally, kerosene serves as a heating fuel in many residential settings, especially in regions where natural gas is not readily available. 

Beyond its use as a fuel, kerosene is also utilized as a solvent in various industrial processes and as a component in the manufacture of chemicals. It can be found in products like fuels for portable stoves, and it is frequently used for cleaning and as an ingredient in some insecticides. 

Overall, kerosene remains an important and versatile resource with a wide range of applications, sustaining its significance in both historical and modern contexts.