The material selection platform
Cosmetics Ingredients
The material selection platform
Cosmetics Ingredients


CAS Number 091824-88-3
Chem/IUPAC Name: 1,2,3-Propanetriol, homopolymer, isooctadecanoates (1:1) (4 mol glycerol average molar ratio)
COSING REF No: 78910
Polyglyceryl-4 Isostearate is an ingredient commonly used in cosmetics as an emulsifier and stabilizer. It is derived from the esterification of isostearic acid with polyglycerin. This compound helps to blend and stabilize the oil and water phases in cosmetic formulations, ensuring a consistent and homogeneous product. Polyglyceryl-4 Isostearate appears as a yellowish to light brown liquid. This ingredient is valued for its ability to improve the texture and spreadability of cosmetic products, allowing for smoother application and enhancing the overall stability of formulations. The chemical formula of Polyglyceryl-4 Isostearate is C30H68O14.


Polyglyceryl-4 Isostearate is widely used in the cosmetic and personal care industry. As an emulsifier, it helps blend and stabilize the oil and water phases in various formulations, such as lotions, creams, and foundations. This ingredient enhances the texture, spreadability, and overall sensory experience of cosmetic products. Polyglyceryl-4 Isostearate also acts as a skin conditioning agent, providing moisturizing and softening benefits. Additionally, it contributes to the long-lasting performance and improved stability of cosmetics, preventing phase separation and maintaining product integrity. Its compatibility with a wide range of ingredients makes it a valuable tool for formulating well-balanced and high-quality cosmetic products.


Polyglyceryl-4 Isostearate is produced through a chemical process known as esterification. Isostearic acid, derived from the hydrogenation of plant oils, is reacted with polyglycerin, resulting in the formation of the ester. This esterification process involves combining the acid and alcohol groups, leading to the creation of Polyglyceryl-4 Isostearate. The resulting compound is then purified and used as an ingredient in cosmetics for its emulsifying and stabilizing properties.

What does POLYGLYCERYL-4 ISOSTEARATE do in a formulation?

  • Emulsifying
  • Emulsion stabilising
  • Skin conditioning

Safety profile

Polyglyceryl-4 Isostearate is generally considered safe for use in cosmetics. It has low toxicity and is well-tolerated by most individuals. However, as with any cosmetic ingredient, some people may be sensitive to it. Patch testing is recommended, and if any adverse reactions occur, usage should be discontinued. Polyglyceryl-4 Isostearate is non-comedogenic, meaning it is unlikely to clog pores. It is also vegan-friendly, as it is derived from plant-based sources and does not contain any animal-derived ingredients.


Technical profile

Property Values
pH 5.0-6.0
Solubility Dispersible in water
Viscosity Low

Commercial Selection : Grades containing solely POLYGLYCERYL-4 ISOSTEARATE

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