PhilGeis
Forum Replies Created
-
phenoxy is ok - soluble enough water , well > use levels. Cerave hyaluronic acid serum uses it as PE 9010. Add something for fungi.
Can’t address eczema concerns.
-
usatoday.com
Your browser is not supported | usatoday.com
Your browser is not supported | usatoday.com
-
(esp. natural) positioned toothpaste is often poorly preserved - relying on flavor components, Aw and fairly protective packaging. Manufacturing needs to have real tight controls.
-
-
uk.pinterest.com
Shop Olay Regenerist Brightening Vitamin C Face Moisturizer - 1.7oz at Target. Choose from Same Day Delivery, Drive Up or Order Pickup. Free standard shipping with $35 orders.
-
The fewer ingredients is a marketing concept. To the question “… is there any drawbacks to making very simple products?” Nothing per se - if it is safe (microbiologically and chemically) safe.
As expressed as the clean concept, it embraces the (usually fake) natural and often, (equally fake)”preservative-free” marketing extension. It is both dishonest and risky.
-
What is the stabilizing salt(s) in each?
-
skin cream with 3 ingredients? can you say what they are?
-
Excellent example of ChatGPT is garbage. Worrying about mold in shampoo is a waste of time.
Shampoos and surfactant products in general very , very rarely suffer mold contamination. Benzoate is not used in shampoos for mold, it’s for bacteria and its interact with surfactants in that regard increases efficacy beyond expectations.
I know some feel the combination of benzoate with sorbate facilitates shampoo preservation. ‘ve not seen this - in my experience benzoate/benzyl alcohol is superior.
-
These are on the high side BUT, within the boundaries of safety (per established ceilings and HRIPT if you can access), there is no “too much preservative”. Folks here work under the technical cover of USP 51-type testing that merely tells that a preservative effect is there - not that it’s enough. Be assured that every cosmetic recalled passed that test and prob with complete kill.
Some pharma micro folks titrate their systems to just pass USP 51 effectively assuming a safety role. To my perspective this is absolute BS. I hope none here follow this stupid practice.
-
Why do you want to autoclave?
-
0.5% (5000 ppm) phenoxy has been my ceiling. What is pH?
GLD? As in GLDA? Why not edta?
-
No - haven’t spoken to Dave recently think he but hasn’t been involved for a some years
-
Yes - suppose you could if use was immediate. I would not
-
To your question - the local blue product prob includes copper ion - consistent with Kathon ICP II. https://www.chempoint.com/products/lanxess/kathon-cg-icp-isothiazolinone-microbiocide/kathon-cg-icp-preservative/kathon-cg-icp-ii
chempoint.com
KATHON™ CG/ICP II, LANXESS - ChemPoint
Request your sample of KATHON™ CG/ICP II preservative that is based on CMIT/MIT and is designed for use formulations with sensitivity to high salt content
-
Do NOT buy ANYTHING from a company so crappy it doesn’t give you a CoA.
-
surfactant-based
-
No. I’m not aware that cocoglucoside surfactants have the same interaction with benzoate as SLS, etc.
Think benzoate alone is not enough and you do need EDTA in any case.
-
Pump dispensing product reduces risk - esp. if non-suck back mechanism. Some folks who have critical control of all manufacturing risks use simplified preservative systems looking only to mold contamination risk.
-
Packaging controls risk of exposure, esp. water (Gram neg) exposure.
-
To the 15 ppm question - the initial intro of Kathon had many using the stuff at 15 ppm and greater in general cosmetics - leave on and rinse off.
EU Cosmetic Directive ceiling initially was 30 ppm for all cosmetic products - a level the supplier Rohm & Haas had shown by extensive testing to be nonsensitizing. However, sensitization became an issue - possibly because folks used it at greater levels. Driven the de Groot publication and the North American Contact Derm Soc. per CIR, the ceiling was lowered to 15 ppm for rinse off and the preservative was later eliminated for use in leave on products.
Wonder that ChatGPT didn’t see this.
-
You don’t need to autoclave or sterilize - need clean and dry material
For bottles and caps
- control your receipts - exclude bottles e.g. used for motor oil, garden pesticides, etc.
- clean completely - same for all whether you see residue or not - remove all cleaning product residue
- rinse with ethanol 70% and let drain and dry
- cover to keep out dust, etc.
Also check out Terracycle https://www.terracycle.com/en-US/
terracycle.com
TerraCycle is an innovative recycling company that has become a global leader in recycling hard-to-recycle materials. They offer a range of free programs, as well as recycling solutions available for purchase for almost every form of waste. Eliminating the Idea … Continue reading
-
Me too. Too much “science” published in context of cosmetics is pure garbage. Consider the interpretation of ChatGPT that considers these vs the occasional good scientific report of folks who understand our technology.
-
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.
-
formula, pH, package
-
Maybe your seeing rancidification - that can be accelerated by some transition metals - esp. copper iron zinc tin reportedly via free radical formation. I know this is a problem the food and biodiesel folks experience. Maybe try some antioxidants but i know the chemistry isn’t that simple and some might make it worse. On the scalp makes it even ore complicated with the human and bug enzymes.
Curious - How did these folks get some much metal on their scalps?