Preservatives

#alltheingredients: Euxyl K 900 (INCI: Benzyl Alcohol (and) Ethylhexylglycerin) preservative

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Euxyl K 900 (INCI: Benzyl Alcohol (and) Ethylhexylglycerin) is considered by the company to be a strong broad spectrum preservative. “euxyl® K 900 is a liquid cosmetic preservative based on benzyl alcohol and ethylhexylglycerin. The addition of ethylhexylglycerin affects the interfacial tension at the cell membrane of micro-organisms, improving the preservative activity of benzyl alcohol....

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Things we find in preservatives: Ethylhexylglycerin

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You might see this ingredient in preservatives like Euxyl® K900 and Euxyl® PE 9010, so what’s it all about then? Ethylhexylglycerin is an alkyl glycerol ether we can use to boost the preserving power of ingredients like phenoxyethanol, methylparaben, and methylisothiazolinone, and works as an effective deodorant, inhibiting the growth of bacteria that might cause body odour....

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Q&A: Which preservative works best with alkaline liquid soap? Let’s talk about the chemistry of soap, pH, and preservatives!

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In the June Q&A, smc asked, Preservatives for liquid soap. I’m playing with liquid soap make, and due to the high percentage of water I’ll need a preservative. What preservatives work well in a high pH environment and doesn’t have a horrible scent? Thanks.  As a quick note before we start, I have pages where...

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Preservatives: Let’s talk about hurdle technology and “self-preservation”

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Thanks for joining me for this aside on the idea of a product that contains water, like a lotion, can be “self-preserving”. There’s a post on Lush’s site – A beginners’ guide to self-preserving – that we’ll get to shortly, but first, we need to take a look at the idea of hurdle technology, “a term used...

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Practice your process: Choosing the right preservative for the job! 

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We need to talk about a preservatives for a bit for both the Tarte Frxxxtion stick duplication and in general. When we’re formulating, we need to evaluate every product to see which preservative will work best with it. In most of the formulas I make, I use Germall Plus liquid because it works with the...

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