Back to Ingredient Dictionary

PEG-4 DIISOSTEARATE

Description

PEG-4 Diisostearate is a versatile emollient and emulsifier commonly used in skincare and cosmetic formulations. This synthetic ingredient is derived from the esterification of polyethylene glycol (PEG) with isostearic acid. Its molecular structure combines hydrophilic and lipophilic properties, making it an effective agent for stabilizing oil-in-water emulsions.

In skincare products, PEG-4 Diisostearate functions primarily as an emollient, helping to soften and smooth the skin's surface. It forms a protective barrier that reduces transepidermal water loss, thus improving skin hydration. The ingredient also acts as a dispersing agent, aiding in the even distribution of other active ingredients throughout the formulation.

PEG-4 Diisostearate is particularly useful in creating lightweight, non-greasy textures, making it suitable for a wide range of skin types, including oily and combination skin. It is often found in moisturizers, serums, and sunscreens. The ingredient's low irritation potential makes it generally well-tolerated, though individuals with sensitive skin should perform patch tests before regular use. As with all PEG-based compounds, it should be used in formulations with an appropriate preservative system to prevent microbial growth.