Article last updated: October 15, 2024
PEG-3 Trimethylolpropane Triisostearate, also known by its chemical name 1,3-Propanediol, 2-ethyl-2-hydroxymethyl-, ethoxylated, triesters with isooctadecanoic acid (3 mol EO average molar ratio), is a synthetic compound widely used in the cosmetic industry. This ingredient is primarily derived from a combination of ethoxylated trimethylolpropane and isostearic acid, which are both synthetic in nature. It is often referred to by other names such as PEG-3 TMP Triisostearate or simply PEG-3 Trimethylolpropane.
The history of PEG-3 Trimethylolpropane Triisostearate in cosmetics dates back to the increasing demand for multifunctional ingredients that can enhance the texture and feel of skincare and makeup products. Initially, the focus was on creating compounds that could serve as effective skin conditioners, and this ingredient emerged as a reliable option due to its unique chemical composition. Over time, it has become a staple in various formulations, thanks to its ability to improve the spreadability and absorption of products.
The production process of PEG-3 Trimethylolpropane Triisostearate involves the ethoxylation of trimethylolpropane, followed by esterification with isostearic acid. Ethoxylation is a chemical reaction where ethylene oxide is added to a substrate, in this case, trimethylolpropane, to make it more hydrophilic. The resulting ethoxylated compound is then reacted with isostearic acid to form the final triester product. This synthesis process ensures that the ingredient is both stable and effective for use in various cosmetic formulations.
In this section, we will delve into the officially recognized cosmetic benefits and uses of PEG-3 Trimethylolpropane Triisostearate:
PEG-3 Trimethylolpropane Triisostearate is primarily used for its skin conditioning properties. This means it helps to maintain the skin in good condition. When applied in cosmetic formulations, it works to keep the skin soft, smooth, and hydrated. This can be particularly beneficial for those with dry or rough skin, as it helps to improve the overall texture and appearance of 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).
PEG-3 Trimethylolpropane Triisostearate 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 Triisostearate during pregnancy and breastfeeding are lacking. Therefore, it is advisable for these individuals to consult a healthcare professional for further advice.
Adverse reactions to PEG-3 Trimethylolpropane Triisostearate are uncommon, but it is always wise to conduct a patch test before widespread use to ensure there is no adverse reaction.
The comedogenicity of PEG-3 Trimethylolpropane Triisostearate is relatively low, typically rated around 1 on a scale of 0 to 5. This means it is unlikely to clog pores and cause acne or breakouts, making it generally suitable for individuals prone to blemishes.
