Pentaerythrityl tetraethylhexanoate is a high molecular weight ester made from the complete reaction of pentaerythritol and 2-ethyl hexanoic acid. In cosmetics and personal care products, pentaerythrityl tetraethylhexanoate functions as an emollient and viscosity increasing agent. This ingredient imparts a “wet” feel on the skin, which makes it useful in creams, lotions, makeup, and lip products. As a viscosity increasing agent, pentaerythrityl tetraethylhexanoate increases the thickness of a formulation and improves spreadability.