Article last updated: October 15, 2024
PEG-3 Trimethylolpropane Tristearate, also known by its more technical name 1,3-Propanediol, 2-ethyl-2-hydroxymethyl-, ethoxylated, triesters with octadecanoic acid (3 mol EO average molar ratio), is a synthetic compound primarily used in cosmetic formulations for its skin conditioning properties. This ingredient is derived from a combination of ethoxylated trimethylolpropane and stearic acid, a fatty acid commonly found in animal and plant fats.
The history of PEG-3 Trimethylolpropane Tristearate in cosmetics dates back to the increasing demand for multifunctional ingredients that can enhance the texture and feel of skincare products. As the beauty industry evolved, chemists sought out compounds that could provide not just aesthetic benefits but also functional ones, such as improved skin hydration and smoothness. PEG-3 Trimethylolpropane Tristearate emerged as a valuable ingredient due to its ability to act as an effective skin conditioning agent.
The manufacturing process of PEG-3 Trimethylolpropane Tristearate involves the ethoxylation of trimethylolpropane, followed by esterification with stearic acid. Ethoxylation is a chemical reaction where ethylene oxide is added to a substrate, in this case, trimethylolpropane. This process modifies the molecular structure, enhancing its solubility and functional properties. The subsequent esterification with stearic acid results in the formation of triesters, which are then used in various cosmetic formulations to improve skin feel and texture.
In this section, we will delve into the officially recognized cosmetic benefits and uses of PEG-3 Trimethylolpropane Tristearate:
PEG-3 Trimethylolpropane Tristearate is primarily used for its skin conditioning properties. This means it helps to maintain the skin in good condition by improving its appearance and texture. When applied in cosmetic formulations, it can make your skin feel softer and smoother. This is particularly beneficial for those with dry or rough skin, as it helps to hydrate and nourish the skin, giving it a healthier and more radiant look.
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).
PEG-3 Trimethylolpropane Tristearate is generally considered safe for use in cosmetic products. However, as with any 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 PEG-3 Trimethylolpropane Tristearate during pregnancy are lacking. Therefore, it is advisable for these individuals to consult a healthcare professional for further advice.
Adverse reactions to PEG-3 Trimethylolpropane Tristearate are relatively uncommon. However, it is always recommended to conduct a patch test before widespread usage to ensure there are no adverse reactions.
On a comedogenicity scale of 0 to 5, PEG-3 Trimethylolpropane Tristearate is generally considered to have a low comedogenic rating, typically around 1. This means it is unlikely to clog pores and cause acne or breakouts, making it suitable for most skin types, including those prone to blemishes.
