End point

Also known as: EP

The end point for a distillation fraction is the temperature at which 100% of the fraction has evaporated when distilled.

This means it is also in theory the cut point between the fraction and the next heavier fraction being distilled, and the initial boiling point of that heavier fraction.

However, in reality, the true end point of a fraction is typically higher than the true initial boiling point of the next highest fraction (i.e., they overlap) because they are complex mixtures of different hydrocarbons. Consequently, refiners in practice split the difference and define an "effective" end point that is in between and therefore lower than the true end point.

The Refinery Reference Desk includes content derived from our industry experts as well as from public data sources such as company websites. Nothing herein is intended to serve as investment advice. This material is based on information that we believe to be reliable and adequately comprehensive, but we do not represent that such information is in all respects accurate or complete. McKinsey Energy Insights does not accept any liability for any losses resulting from use of the content.

McKinsey uses cookies to improve site functionality, provide you with a better browsing experience, and to enable our partners to advertise to you. Detailed information on the use of cookies on this Site, and how you can decline them, is provided in our cookie policy. By using this Site or clicking on "OK", you consent to the use of cookies.