PhilGeis
Forum Replies Created
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Can’t offer a risk assessment based on what your boss “thinks.” But I understand your position. Just make sure your “boss”, not you, is responsible on paper for this product.
https://www.usptechnologies.com/what-are-h2o2-stabilizers-and-will-they-affect-my-application/
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Yes - stop it. If you don’t know what’s in your ingredients, you should not be exposing consumers to your product.
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OK - it’s not as good and fairly useless vs Gram positives and fungi
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Doubt it’s anything special re. micro. More gee whiz - note they do not compare to other surfactants. Even marketing does not recommend preservative free.
Why phenethyl vs,. phenoxyethyl?
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Activated charcoal in cosmetics is useless.
You’ll need enough for consumers to see it when they use the product.
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PhilGeis
MemberNovember 12, 2023 at 3:50 pm in reply to: Filling cosmetics bottles to the top: bad idea?Net contents must be right per MAV - not under or overfill.
Don’t want product squeezed lout merely holding the bottle.
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PhilGeis
MemberNovember 9, 2023 at 8:40 am in reply to: filtering particles in the bulk produced productAmen Microformulation!! Recall an instance when poor process design had the preservative precipitate - filtration of “particles” left it unpreserved with predictably contaminated.
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Ethanol is your antiseptic active so 60% or greater. Very Very unlikely you’ll be successful with foaming.
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PhilGeis
MemberNovember 7, 2023 at 8:41 am in reply to: Effect of water hardness on SLS surfactant when it is combined with SLES and CAPBCurious re definition of sensitive. SLS innovation and success last century was for the resolution of problems with true-soap based products and hard water.
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Always use multiple preservatives.
1) no single preservative has true broad spectrum efficacy
2) it’s harder for a contaminant to adapt to multiple preservatives vs a single compound
Phenoxy is prob best 0.5%. ECT is over formulated
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Thanks. Pretty casual “science” published in a second rate journal. I’d not put too much significance to normal product use/benefit. They tested a product with 30% EMU oil, not the ingredients or vitamins; control/placebo was not defined; 11 subjects split between test and placebo in unidentified numbers; product application via pad was uncontrolled; technical benefits reported vs visual expression,; questionable interpretation (Fig 3 - claimed benefit when errors bars clearly overlapped).
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Sorry - 10% Emu oil.
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With some surfactants, the effective pKa of benzoate is increased making it effective at higher pH.
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the curse of Dabre - the partron saint of garbage science.
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Benzyl alcohol, Kathon and EDTA is a good combination.
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PhilGeis
MemberOctober 28, 2023 at 1:58 pm in reply to: Beneficial % of Vitamin E acetate and Tetrahexyldecyl ascorbate in serumsUnless you can are willing to chase a benefit in clinicals, cut it down to minimal levels.
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Imagine my surprise!! Ricky Mountain product development never got back with info requested.
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Hard to see how they “sterilize” and maintain as sterile packaging and raw materials and how thyey consider Aw in context of an emulsion.
Asked for validation through consumer use - they forward to their product development.
Let’s see.
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here’s what they said, it’s BS
Products can be made with zero preservatives (oat lotion) adhering to the following conditions:
Use 100% sterile raw materials
Use 100% sterile packaging materials
Follow strict GMP from start to end, as listed below.
Design the product as very low water-activity
Maintain the pH in the 4-6 range
Use raw materials which act as pseudo-preservatives.
Minimize human (user contamination).
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Not aware such data exists for others.
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correction …… with the right challenge test.
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One can see the impact in challenge test results - with the right challenge test resukts.
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What do you think is caffeine’s impact on those conditions?
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0.7 prevents growth, does not kill. For emulsions Aw may not matter.
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PhilGeis
MemberOctober 25, 2023 at 10:32 am in reply to: Piroctone Olamine % in this Head & Shoulders shampoo?I have some insight re. this - the active is not the only “tricky” element.