Chemistry

Preservatives and inactivation: Some references, articles, and studies that might interest you!

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There was such interest in this post on inactivation of parabens by various ingredients, I wanted to share more with you about preservatives. One of the things on this blog that isn’t so obvious at times is that we need to evaluate each product to see which preservative works best with it, there’s not a...

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Q&A: Is allantoin amphoteric? What’s an isoelectric point? Can we use it in anionic products?

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Let’s continue with Mia Makes Things’ questions about using Germaben II in products and her third question about allantoin: The closest thing I’ve found is Sepimax ZEN, a gel former, which is anionic. And even then, as an anionic ingredient it prohibits the use of the cationic (at typical pH) allantoin. Which pretty much defeats my...

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Further adventures in cosmetic chemistry: What’s up coming next! 

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As I was writing up another variation of the Saje Psoria Ease Healing Treatment Lotion about incorporating rheology modifiers into our lotions – things like xanthan gum or gelling agents – I realized I needed to stop so I can finish the series I was sharing about some of the cosmetic chemistry terms I was...

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Q&A: Are there oils we shouldn’t freeze? Oils and titer points, surfactants and cloud points

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Quite a few times, Marta has asked this question, and I’ve been remiss in answering it. She posed it again in the Discussion: How do you decide what to make? What about mulitifunctional products? How do you store and inventory your stuff? and shared what she heard from Lotioncrafter. I emailed Lotioncrafter to ask why the...

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Misconceptions about pH: It isn’t a series of steps

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I shared this on my blog Facebook page, but didn’t share it here. Sorry about that. I encourage you to check out some of the comments as there are some interesting ones, and some from my bestest ever friend, Hamsa Ryuugan posing as Claudia Celeron. (He’s blocked me, which is just so sad and pathetic,...

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