PhilGeis
Forum Replies Created
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What were challenge test data vs Aspergillus brasiliensis? Or are are you testing?
What is pH?
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Ingredient preservatives are not usually listed.
It may have been as oldperry suggested or that this level of preservation was needed to pass their challenge test. Most major companies do not use USP 51 per se - it’s a pretty weak test. They add relevant manufacturing and consumer return bugs. On its face, there nothing wrong with this combination, esp. as we do not know the levels.
DMDM Hydantoin is not great vs fungi. Surfactant products are typically more resistant to fungi.
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“A twenty-four month expiry period may be assigned upon successful completion of three months accelerated testing.”
chpa.org
The objective of this guideline is to define the minimum stability data package to support the commercial distribution of OTC monograph drug products in the United States per climatic zone.
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testing
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Perhaps try low % polyvinyl alcohol film. High levels used in some face masks are irritating.
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polyvinyl alcohol?
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As matt said - 40-45C for 1 and 3 months. For accelerated, I’d not go greater in temp or longer in time. Rule of thumb is 3 months accelerated/rapid aged product data justifies 1 yrs stability but that is not validated. I use 1 month stability (preservation) data to justify marketing for cosmetics and 3 for OTC drugs with 1 yr ex data. .
You must confirm with real time data out to three years.
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Doing a test here.
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As matt said, conventional is - 40-45C one and three months, with latter approx 1 year stability. I’ve gone to market on 1 month data for cosmetics and 3 for OTC’s. .
This is rule of thumb - not validated - and may be be appr. for all products. You must execute real time stability to confirm.
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Assume raw material are within their ex date. That date is not generally considered in finished product ex dating.
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No.
From the micro side, the necessity of removing bugs indicates a contaminated/adulterated raw material that would establish your finished product as adulterated. Cosmetic manufacturing is nonsterile and it’s hard to imagine how this could even be accomplished without immediate recontamination.
From the particulate side, the adulteration is also in question and such filtration is very inefficient and it’s unwise to become your own raw material reconditioner. Pay the supplier to deliver the material you need to make product. You’re in the cosmetic not raw material business.
For susceptible stuff you might make in house such as a proprietary ferment, preserve it. whether filtered or not.
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This seems absurd - but no more so than the same claim on any cosmetic.
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SDS addresses the raw material, not in application. Beyond the product, the combination is irrelevant. Down the drain fate is a function of the individual chemical and sanitary sewers/sewage treatment. Sorry, I no longer have relevant environmental safety data. Can only say it met the envir. safety standards.
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You should use only in shampoos, conditioners, hand soaps - products that you rinse off after use. Never use in creams, lotions, makeup - products that are applied and left on.
5 ppm is plenty
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Model is Kathon CG- supplied as 1.5% active - the target in formula should be no more than 7.5 ppm active. 15 ppm active is too much. I use 5 ppm, and some claim synergy with formaldehyde releasers at less.
When 1st marketed, folks used too much - 15 ppm and more provoking a lot of sensitization. Still recognized as risk for sensitization. Now it’s used only in rinse off products.
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What brand is that?
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I’ve used passing data with product aged 1 month at 40C as justification to market - confirmed with data from 3 month 40 and real time.
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as Perry said
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as matt said
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40-45C for 1 and 3 months. I’d NOT go beyond 3 months or 45C. I’ve gone to market with passing preservative data from 1 month.
The ex date projected from this kind of testing is kinda flakey. There is an ISO method 18811 that prob could be seen as precedent but its no more validated than any. The comment you use is about as good as any.
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Can’t add much more to what Matt said. 86 the EDTA - need something for the fungi - what’s pH and what is your po9licy as in parabens formaldehyde releasers etc.)??
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I’m with you
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Depends on what’s “best.” Brand success in sales doesn’t look to a balance but to a push on the “fluff” as far as regulators will allow and consumer swallow - and hopeful consumers will swallow a lot. Witness clean beauty, antiaging, paraben-free, recyclable or compostable packaging.
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“…less harmful ingredients” admits they are harmful but less so than other ingredients that might be used. Don’t think that is a helpful claim in comparison to the propaganda of clean beauty and natural perceptions.
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It’s not just the coacervate technology. Efficacy via active deposition based on physical aspects is also studied/controlled.