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Micellar water one phase preservative
Kindly need your support to choose the best preservative for the micellar water preservative noting that sodium benzoate and potasium sorbate change the color of the formula from clear to yelow and the phenoxyethanol, ethyl glycerin have an irritation effect.
Thanks for your help -
34 Replies
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If formaldehyde releasers isn’t a problem then use germall plus powder. I find it works well in formulations where transparency is important. I can’t comment on whether it will preserve your particular formula and you need to do all necessary tests (it’s a good preservative in general) but it shouldn’t contribute to cloudiness
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Irritation effect ? Is this from experience or heresay? Glycols help but that still at minimum leaves a fungal gap. IPBC is any option - some use PHMB.
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PhilGeis said:Irritation effect ? Is this from experience or heresay? Glycols help but that still at minimum leaves a fungal gap. IPBC is any option - some use PHMB.
Thank k you Mr. PhilGeis
PHMB is banned since 2015 because this product is carcinogenic -
Think EU cosm directive allows 0.1% with stipulation - “Not to be used in applications that may lead to exposure of the end-user’s lungs by inhalation.”
Are there other nonpermissive directives? -
Another biguanide - polyaminopropyl biguanide.
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Thanks a lot for your help
I will try PHMB -
Try to other biugunaide 1st - polyaminopropyl biguanide.
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Drop the pH to 5 and sodium benzoate is perfectly adequate.
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Belassi said:Drop the pH to 5 and sodium benzoate is perfectly adequate.
I agree, plus I’d be surprised if the product was that far off pH 5 anyway.
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Sodium benzoate by itself is not adequate. A simple check of cosmetic labels (not just for micellar water) shows virtually none using that option. Pseudomonads eat benzoate.
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Sodium benzoate and benzoic acid @1.25%
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PhilGeis said:Try to other biugunaide 1st - polyaminopropyl biguanide.
I will
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PhilGeis said:Sodium benzoate by itself is not adequate. A simple check of cosmetic labels (not just for micellar water) shows virtually none using that option. Pseudomonads eat benzoate.
Tell that to Coca or Pepsi Cola. That is the preservative they use.
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Belassi said:PhilGeis said:Sodium benzoate by itself is not adequate. A simple check of cosmetic labels (not just for micellar water) shows virtually none using that option. Pseudomonads eat benzoate.
Tell that to Coca or Pepsi Cola. That is the preservative they use.
But the pH of cola is ~2.5, not 5. I’m guessing that makes a difference, but I don’t know.Cola facial peels might be the next big thing. Or cola cleansers. Or a post bar soap washing cola hair rinse. The stickiness is just natural humectants! -
Coke cola? A single-use product in a pressurized, herrmetically-sealed vessel at a prohibitive pH? Coke is clearly irrelevant.
Benzoic acid (Na benzoate) as preservative has a substantial Gram negative gap. One need merely look at COSMETIC products now on the market to see its limited use - and virtually always as a secondary preservative.
Please - preservation is a serious effort. Infections from contaminated cosmetics have resulted in blindness and even death. If you don’t know the subject well, please do not offer casual suggestions.
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I am doing a chalenge test before using any preservative
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Andraous said:I am doing a chalenge test before using any preservative
In a german lab before. To make sure that the prervative is good
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Andraous said:I am doing a chalenge test before using any preservative
Why?
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To. Make sure that the bacteria can’t growth inside my formula.
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@Andraous I don’t get your point. If bacteria can’t grow in your formula (assuming it’s self preserving) why would you need a preservative?
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ngarayeva001 said:@Andraous I don’t get your point. If bacteria can’t grow in your formula (assuming it’s self preserving) why would you need a preservative?
I am doing chalange test for the final formula with the preservative. If results is good a cab proceed with it if not it can not be used
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There is a reason every cosmetic product on the market includes preservatives.
Why would you assume your product is uniquely “self-preserving.” -
I encourage folks to design a system that should work (theoretically effective against Gram -/+ and fungi) and then confirm it works vs these in challenge testing both as made and after ageing. Passing a classic USP 51 (as EP or ISO) is not a guarantee. Prrservatives help in manufcturing but are primarily intended (as specified by FDA and EU cosmetic directive) to protect consumers in use and USP is not validated fpr that.
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PhilGeis said:There is a reason every cosmetic product on the market includes preservatives.
Why would you assume your product is uniquely “self-preserving.”You dont understand me. I dont say that
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