An oil distillate. Naphta is an intermediate product between gasoline and kerosene. It is known as a light product because of the low molecular weight of the hydrocarbons making it up
EESiFlo North America, Terminology and Glossary: Oil & Gas Terms, Pennsylvania, USA 2002. flowmeterdirectory.com/flowmeter_terminology, (Mrtm/ Oil and Gas - Amer) {566}