Pentaerythrityl tetraisostearate is a water-insoluble ester used in skincare formulations as a thickening agent, moisturizing component, and binder. It is derived from isostearic acid, a fatty acid, and is also referred to as PTIS.
Pentaerythrityl tetraisostearate is a high-molecular-weight liquid oil with the molecular formula C₇₇H₁₄₈O₈ and a molecular weight of 1201.99. It does not dissolve in water.




