PhilGeis
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What do you know of DCMIT safety?
I don’t know stability - what surfactant?. Challenge test so final product application should give you some assurance and that must be repeated tough the period of premix use.
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I would not.
What is DCMIT? What else is in it? Some salt for stability?
At 14%, the volume added is so small, you’ll have trouble getting it sell mixed. For a premix, you should prob ensure it’s stable.
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I would not. Too much unknown.
Industrial preservatives are classified as pesticides in some countries (e.g. US) and some countries specifically ban the use of pesticides in cosmetics (e.g. Canada).
For some suppliers - these are the same a stuff - just labeled differently. For others, the stuff intended for industrial market is less controlled, more impurities, byproducts..
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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.
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usatoday.com
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(esp. natural) positioned toothpaste is often poorly preserved - relying on flavor components, Aw and fairly protective packaging. Manufacturing needs to have real tight controls.
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This reply was modified 3 months, 1 week ago by PhilGeis.
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This reply was modified 3 months, 1 week ago by
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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.
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What is the stabilizing salt(s) in each?
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skin cream with 3 ingredients? can you say what they are?
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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.
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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.
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Take a look at ISO 29621
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At 0.2 Aw you should not bother to challenge test. Stndard tube is protective packaging.
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This reply was modified 3 months ago by PhilGeis.
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This reply was modified 3 months ago by
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0.5% (5000 ppm) phenoxy has been my ceiling. What is pH?
GLD? As in GLDA? Why not edta?
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No - haven’t spoken to Dave recently think he but hasn’t been involved for a some years
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Yes - suppose you could if use was immediate. I would not
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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
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Do NOT buy ANYTHING from a company so crappy it doesn’t give you a CoA.
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surfactant-based
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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.
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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.
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Packaging controls risk of exposure, esp. water (Gram neg) exposure.
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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.
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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/
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This reply was modified 3 months, 3 weeks ago by PhilGeis.
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This reply was modified 3 months, 3 weeks ago by