Article last updated: October 15, 2024
Polyglyceryl-2 Sesquistearate, also known by its chemical name 1,2,3-Propanetriol, homopolymer, octadecanoates (2:3) (2 mol glycerol average molar ratio), is a versatile emulsifying agent commonly used in cosmetic formulations. This ingredient is derived from glycerol and stearic acid, both of which are naturally occurring substances. Glycerol, also known as glycerin, is a simple polyol compound, while stearic acid is a saturated fatty acid typically sourced from animal fats or vegetable oils.
The history of Polyglyceryl-2 Sesquistearate in cosmetics dates back to the increasing demand for more natural and skin-friendly emulsifiers. Traditional emulsifiers often posed issues such as skin irritation or were derived from less sustainable sources. As a result, chemists began to explore alternatives that could offer the same emulsifying properties without the drawbacks. Polyglyceryl-2 Sesquistearate emerged as a solution, providing effective emulsification while being gentle on the skin and more environmentally friendly.
The production of Polyglyceryl-2 Sesquistearate involves a process known as esterification, where glycerol is reacted with stearic acid. This reaction results in the formation of a compound that can effectively stabilize mixtures of oil and water, which is essential for creating smooth and consistent cosmetic products. The “2” in Polyglyceryl-2 indicates the average number of glycerol units in the polymer, while “sesquistearate” refers to the stearic acid component. This specific structure allows it to function efficiently as an emulsifier, ensuring that ingredients in a cosmetic product remain well-mixed and stable.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Polyglyceryl-2 Sesquistearate:
Polyglyceryl-2 Sesquistearate is primarily used as an emulsifying agent in cosmetic formulations. But what does that mean for you? Essentially, an emulsifier helps to blend ingredients that typically don’t mix well together, like oil and water. This is crucial in creating smooth, stable, and homogenous products. Think about your favorite lotion or cream; without an emulsifier, it would separate into oily and watery layers, making it less effective and pleasant to use. By keeping the ingredients well-mixed, Polyglyceryl-2 Sesquistearate ensures that the product maintains its consistency and efficacy over 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-2 Sesquistearate is generally considered safe for use in cosmetic products. It is well-tolerated by most skin types and is not known to be a common allergen. However, as with any ingredient, there are potential side effects to be aware of:
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of Polyglyceryl-2 Sesquistearate during pregnancy are lacking. Therefore, it is advisable for these individuals to consult a healthcare professional for further advice.
Adverse reactions to Polyglyceryl-2 Sesquistearate are relatively 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-2 Sesquistearate 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.
