Welcome to the last day of this blog post series! I hope you've enjoyed it so far, and have found it enlightening. Today we will cover our last set of molecules--sterols, sulfonic acids, sulfosuccinates, sulfuric acid esters/organosulfates, triglycerides and thio compounds

Day four of my blog post series: Molecules in Cosmetics. Today we'll go over the structures of polyethylene glycol, polyols, quaternary ammonium compounds, sarcosinates, siloxane and soap!

Yesterday we took a look at some of the most important chemical structures you should know about in cosmetic chemistry. Today we'll take a look at halogen compounds, hydrocarbons, imidazolines, inorganic acids, isethionates, ketones, and phenol.

Let's get right into it! Today we'll be talking about betaines, carbohydrates, carboxylic acids, ethers, ethylene oxide, esters, fatty acids, fatty alcohols, and glycols. These chemical structures are some of the most prevalent molecular structures you'll encounter in cosmetics, so I suggest getting familiar with them. These are especially important if you get into skin care formulations.