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Can mold grow in 30% coco glucoside?
I’m thinking of a shampoo with 30% coco glucoside.
Do you still need a separate preservative for mold?
I’m including broad-spectrum anti-bacterial preservative so no worries about bacteria.
It must be one big freak of a mold to be able to grow in 30% surfactant is what I am thinking.
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8 Replies
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What is pH?
What is your preservative?
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I’m thinking of pH 4.7-5.5 and anti-bacterial and anti-yeast preservatives are caprylyl glycol and 1,2 hexanediol. I suppose I can add sodium benzoate.
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Be careful, those are not true preservatives but rather preservative boosters. You will still need to add a true preservative, like sodium benzoate.
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Thanks. But I wonder. When I did test it on microbial testing, they actually killed Gram positive and negative bacteria (cap+1,2 hex) in broth full of bacterial food. And a product I used for over a year in the bathroom, preserved with only low percentage of the above, did not have any bacterial growth (0 CFU) when I tested. But I’m aware that they are mentioned as preservative boosters commonly; I wonder why.
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That is a question for the expert, @PhilGeis 🙂
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I understand folks here are limited to the USP 51 based test that relies on microbes maintained in the lab each for many decades - one approaching 100 years. They are not representative of those that contaminate cosmetics. The test merely tells you the material has some antimicrobial efficacy, not that it has enough. Be assured that about every cosmetic product recalled passed the test, often with complete kill.
The significance of one additional in-use experience with a near term batch means nothing to the risk of lots of uses of just made and aged multiple product batches in the hands of all sorts of folks and their practices. You do not want to risk any of these folks within the boundaries of their intended and reasonably foreseeable misuse of any batch whenever they get it.
Few have the resources to develop/use a test validated to use or execute valid consumer testing. So please start with what should work, show the expected result in challenge.
Please understand safety - micro or chemical - is an affirmative process. Use a preservative systems that should and do work - not one that’s been dialed down to just pass or a couple of boosters.
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0.5% 1,2 hexanediol+ 0.5% caprylyl glycol + 0.3% sodium benzoate+ 0.1% EDTA
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Thank you.
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