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Phenoxy and ethoxylated surfactants.
Aloha
I use PE 9010 (phenoxy + EHG) as the jumping off point for most of my potions preservation system. I also use 165 type (Glyceryl Stearate and PEG-100 Stearate) emulsifier as a jumping off point on almost all emulsions. I have long been aware of the little blurb buried in the marketing material, regarding “Ethoxylated surfactants may lead to loss of effectiveness.”
My memory was jogged recently when a cosmetic chemist mentioned that she does not use Phenoxy when using, and she included PEG-100 stearate in her list.
I had researched (maybe bounced of my mentor) this topic before, and was assured in a typical emulsion that might have 4% 165 type….which further delineated might have 1.5% ethoxylated content…. that the poison was all in the dosing. Meaning …. at that inclusion rate, it was not a concern.
Compound this with….one can find 1,000 commercial formulas with PE 9010 and 165…. what is the dosing that creates the poison?
It was sooooooooo long ago…. that I looked into this…. about all I could remember from the dusty memory banks was something to the effect of…. not a big concern unless you are working with a very heavy load of ethoxylated emulsifiers/surfactants.
Would love to hear thoughts….see links to research…etc. Calling Dr Phil … @PhilGeis
In organizing the lab the other day…. I found a sample of an emulsion that was 1,631 days old….with the aforementioned suspects …. Looks like the day I made it. 😉
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This discussion was modified 2 hours, 8 minutes ago by
Graillotion.
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This discussion was modified 2 hours, 8 minutes ago by
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