Article last updated: October 15, 2024
Polyglyceryl-5 Isostearate, also known by its chemical name 1,2,3-Propanetriol, homopolymer, isooctadecanoates (1:1) (5 mol glycerol average molar ratio), is a versatile emulsifying agent commonly used in cosmetic formulations. This ingredient is derived from glycerol, a natural compound found in fats and oils, and isostearic acid, a branched-chain fatty acid. The “5” in its name indicates that it is a polymer of glycerol with an average of five glycerol units per molecule.
The use of Polyglyceryl-5 Isostearate in cosmetics can be traced back to the growing demand for more stable and effective emulsifiers. Emulsifiers are crucial in cosmetics as they help blend water and oil-based ingredients, ensuring a consistent and smooth product. Over the years, chemists have developed various polyglyceryl esters to meet the specific needs of different formulations, and Polyglyceryl-5 Isostearate has emerged as a popular choice due to its excellent emulsifying properties and skin compatibility.
The production of Polyglyceryl-5 Isostearate involves a multi-step chemical process. First, glycerol undergoes polymerization to form polyglycerol. This polyglycerol is then esterified with isostearic acid, resulting in the formation of Polyglyceryl-5 Isostearate. This process not only ensures the stability of the emulsifier but also enhances its ability to blend seamlessly with other ingredients in cosmetic products.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Polyglyceryl-5 Isostearate:
Polyglyceryl-5 Isostearate is primarily used as an emulsifying agent in cosmetic formulations. This means it helps to blend water and oil-based ingredients together, creating a stable and homogenous mixture. In simpler terms, it ensures that your creams, lotions, and other skincare products don’t separate into oily and watery layers. This is crucial for the consistency and effectiveness of the product, making sure you get a smooth application every time.
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-5 Isostearate is generally considered safe for use in cosmetic products. It is a mild ingredient with low allergenic potential, making it suitable for most skin types. However, as with any cosmetic ingredient, some individuals may experience side effects. Potential side effects of topical application of Polyglyceryl-5 Isostearate include:
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of Polyglyceryl-5 Isostearate during pregnancy are lacking. Therefore, it is recommended that they consult a healthcare professional for further advice before using products containing this ingredient.
Side effects and adverse reactions from Polyglyceryl-5 Isostearate are uncommon. However, it is always a good practice to conduct a patch test before widespread usage to ensure that your skin does not react negatively to the ingredient.
Polyglyceryl-5 Isostearate has a comedogenic rating of 1, which means it is very unlikely to clog pores. This makes it a suitable option for individuals who are prone to acne, blemishes, or breakouts.
