Chemistry Thursday: Esters we use as emollients (overview), part 31

Welcome back to this introduction to cosmetic chemistry course! We’ve had great fun for the last few months looking at carboxylic acids as fatty acids, but it’s time to meet some esters! Woo hoo! I’m trying to make this post shorter than the previous ones as I know it can be a lot. An important...

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Chemistry Thursday: Introduction to esters, part 30

Welcome back to this introduction to cosmetic chemistry course! We’ve had great fun for the last few months looking at carboxylic acids as fatty acids, but it’s time to meet some esters! Woo hoo! This is a pretty huge post as I wanted to have something to which I can refer back in the future....

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A reminder: Oils and anhydrous products don’t have a pH!

I saw someone on social media the other day trying to measure the pH of oils, and thought it was a good thing to share this reminder – oils don’t have a pH. They can’t have a pH because you need water to have a pH. Before we start I have a huge section on...

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Chemistry Thursday: Carboxylic acids – very long chain fatty acids, behenic acid (C22:0) and higher, and how behentrimonium methosulfate (BTMS) or behentrimonium chloride (BTMC) works, part 29

Welcome back to our introduction to cosmetic chemistry series! I hope you’re enjoying it so far. I know I am! Let’s talk more about carboxylic acids, specifically the fatty acids we find in our ingredients and oils. This week, it’s all about behenic acid (C22:0) – the fatty acids, but more importantly, the ingredients derived...

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Chemistry Thursday: Carboxylic acids – C20 very long chain fatty acids, part 28

Welcome back to our introduction to cosmetic chemistry series! I hope you’re enjoying it so far. I know I am! Let’s talk more about carboxylic acids, specifically the fatty acids we encounter over and over again in our liquid oils, solid oils, butters, and waxes. This week, we’re getting into very long chain fatty acids,...

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