PhilGeis
Forum Replies Created
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You should start with irradiated clay and supplement with more water soluble preservatives - glycols, organic acids if pH works. What’s your water quality?
CoA <100cfu/ml ? How did they treat the stuff?
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The sales brochure offers preserved formulae @ pH’s inconsistent with expected range of effect. Think these folks know nothing of preservation. Consider it as a surfactant, not for any preservation potential.
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Because the label says “deodorant”, is packaged like one and kooks like one. There’s no test it must satisfy. Caveat emptor, esp. with graillotion’s observation.
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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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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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Amen 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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Curious 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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Micro quality?
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like matt said
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An idea levels in that commercial product? Chloromethyl might be a stability problem at that pH esp. if any free amines. Methyl is good but needs ~100 ppm.
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I too await the citations. Pretentious claims for natural ingredient safety are typically based on absence of any safety data. As a toxicologist pal commented - “the only totally safe ingredient is the one that no one has tested”.
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“Hurdle” is a poor preservative approach in consumer use. There’s nothing esp. “intelligent” about it.
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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?