PhilGeis
Forum Replies Created
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Think it’s less the testing than design and operation of couple of DI tanks installed.
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See Purified water
https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/inspection-guides/high-purity-water-system-793Water systems are operated on alert and action limits rather than specs.
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“Made” anywhere does no exclude sourcing of (ridiculous) ingredients.
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@mikethair
pH 10 is not prohibitive. The recent recall of PineSol products (pH 10-11) is a recent example. https://pinesolrecall.com/?msclkid=7221f00cbb641775ef2b93631ee60e86&gclsrc=ds&gclsrc=dsContamination in liquid laundry (Tide), household cleaners as above and even bar soaps are additional examples.
Micro testing is often misdirected. Bugs growing at pH 10 may not grow on conventional media of +/- neutral pH. the Fabric softener Downy (acidic pH) includes a preservative to control a specific microbe that only grows at pH 5 and below and was missed for years by testing with conventional media.
Laundry and similar products use preservatives to control manufacturing contamination - they don’t worry about consumer use as bugs ok with the tough conditions aren’t usually found in households.
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@Graillotion - good point!
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Used pyrophosphate in cleaners
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Halomonas Nesterenkonia Bacillus are the genera whose species can grow in high pH products
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Don;t recall the specific phosphate but figure that’ll work.
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The same ones that grow in Liquid Tide. Odor, color and clarity compromised.
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To Graillotion’s point
Identification of Didecyldimethylammonium Salts and Salicylic Acid as Antimicrobial Compounds in Commercial Fermented Radish Kimchi
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This is a rinse off product. Whatever dog skin pH may be and the literature finds it mild alkaline - how would a pH 5 shampoo affect dog skin?
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Vince - curious the research that recommended those. There not effective in anything.
Folks use the same preservatives in human products - incl. isothiazolinones and formaldehyde releasers such as the Germall+ your colleague uses. Look on labels. -
Whatever the pH of dog skin, on what basis is a shampoo rinse off product with 6-8 pH going to affect it? What are the data?
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Maybe not CMI - it’s unstable at 10 so effect is very time limited
Benzoisothiazolinone is ,prob more common in this category. -
I don’t recall the levels. It’s been way too long - Sorry
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Then use phosphate
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Phosphate in household products was banned last century on the mistaken belief that source cause eutrophication of surface waters.
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Why not zeolite
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From one-trick-pony microbiologist - could av chlorine in tap water also be a factor?
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Think 1% DHA is excessive and beyond solubility limit. not sure you need benzyl alcohol if phenoxy 0.3% and EDTA 0.1%.
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@abhiromeo
chloromethylisothiazolinone (Kathon) or a formadehyde releaser -
Sorry as not relevant to your question - parabens are not good preservatives for shampoos.
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what is pH?
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Please describe the formula context.