Article last updated: October 15, 2024
Polyglyceryl-3 Isostearate, also known as 1,2,3-Propanetriol, homopolymer, isooctadecanoates (1:1) (3 mol glycerol average molar ratio), is a versatile emulsifying agent commonly used in cosmetic formulations. This ingredient is derived from glycerol and isostearic acid, which are both naturally occurring substances. Glycerol, also known as glycerin, is a simple polyol compound, while isostearic acid is a branched-chain fatty acid.
The history of Polyglyceryl-3 Isostearate in cosmetics dates back to the increasing demand for more stable and skin-friendly emulsifiers. Traditional emulsifiers often had limitations in terms of stability and potential skin irritation. Researchers sought to develop new compounds that could offer better performance and safety profiles. Polyglyceryl-3 Isostearate emerged as a solution due to its ability to create stable emulsions and its gentle nature on the skin.
The production of Polyglyceryl-3 Isostearate involves a chemical reaction known as esterification. In this process, glycerol undergoes polymerization to form polyglycerol, which is then reacted with isostearic acid. The result is a compound that can effectively blend oil and water phases in cosmetic formulations, creating smooth and stable emulsions. This makes it an ideal ingredient for a wide range of products, from creams and lotions to makeup and sunscreens.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Polyglyceryl-3 Isostearate:
Polyglyceryl-3 Isostearate is primarily known for its role as an emulsifying agent. In simple terms, this means it helps to mix oil and water, which are two ingredients that typically don’t blend well together. This is crucial in many cosmetic products, such as creams, lotions, and makeup, where a smooth and consistent texture is desired. By ensuring that the oil and water components stay mixed, Polyglyceryl-3 Isostearate helps to create a stable and uniform product that feels pleasant on the skin.
Note: the listed benefits above are exclusively based on the officially recognized and defined functions of the ingredient, as documented by the International Nomenclature of Cosmetic Ingredients (INCI).
Polyglyceryl-3 Isostearate is generally considered safe for use in cosmetic products. It is known for its emulsifying properties, which help to blend water and oil-based ingredients, creating a stable formulation. However, as with any cosmetic ingredient, there are potential side effects and considerations to keep in mind.
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of Polyglyceryl-3 Isostearate during pregnancy are lacking. Therefore, it is advisable for pregnant or breastfeeding women to consult a healthcare professional for further advice before using products containing this ingredient.
Side effects and adverse reactions from Polyglyceryl-3 Isostearate are generally uncommon. However, as with any new skincare product, it is recommended to perform a patch test before widespread usage to ensure there is no adverse reaction.
In terms of comedogenicity, Polyglyceryl-3 Isostearate is rated as a 1 on a scale of 0 to 5, where 0 is totally non-comedogenic and 5 is highly comedogenic. This low rating indicates that it is unlikely to clog pores, making it suitable for individuals who are prone to acne, blemishes, or breakouts.
