C5+ refers to a mixture or fraction of hydrocarbons derived from crude oil or natural gas that contains hydrocarbon molecules with five or more carbon atoms. It includes a range of hydrocarbons, such as pentanes, hexanes, heptanes, and higher hydrocarbons. C5+ fractions typically have higher boiling points and can be further processed to obtain specific hydrocarbon products based on their carbon chain length and properties. These fractions are commonly used as feedstocks in the production of gasoline, solvents, and various petrochemicals. The specific composition and applications of C5+ fractions can vary depending on the source and refining processes involved.