Naptha is a heavier product of crude oil, meaning it isn’t made made up of single hydrocarbon molecules, like methane, butane, ethane, and propane. Instead, it is composed of different ranges of molecules. Naptha is a term used for petroleum molecules that have a boiling point between between 30°C and 200°C. Naptha range molecules help improve gasoline octanes. They are also used in petrochemicals like plastics, and in fertilizer production. After the initial refining process, it’s known as whole cut naptha. Whole cut naptha is then divided into two categories: light naptha and heavy naptha.