PhilGeis
Forum Replies Created
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Phenoxyethanol should not be greater than 1%, 0.5-0.8% is good.
What’s product pH?
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Please idenity the preservative actives and their specific %’s. Folks are not going to chase down the cats and dogs of commercial mixtures.
EDTA at ~0.1% accid
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You do have dilemma - addition to finshed product will certainly risk poor distribution and 100C is a bear for chemical and physical stability.
Do you consider this a water in oil or oil in water?
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Right - we’re all going to die and your efforts will save the planet.
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Why would it make a difference what sourced (triple pressed) stearic acid?
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This reply was modified 11 months, 2 weeks ago by PhilGeis.
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This reply was modified 11 months, 2 weeks ago by
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ok
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For the “complete list” you have it.
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The question would by why it is in the product - the “intent”. What cosmetic function would it serve and why this recognized drug active the choice vs nondrug actives?
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Leucidal is useless - esp. in this context - and parabens and benzoate (but for one supplier) are not legal preservatives for household products in US. How much ethanol?
pH 7.5 is an odd condition for a household cleaner. Why is that your choice?
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Think BAK in such products is a ghost ingredient, a charade.
pH (via HCl) is typically <3, hydrolyzes protein and biofilm, dissolves metal hydroxides and is low enough to kill bugs/disinfect. They can;t claim to be a “disinfectant” since HCl is not a registered disinfectant active produced at a EPA registered site. Tossing in BAK (a registered disinfectant active) let’s them claim to be a “disinfectant” but does little to nothing for the product. Quats are most active pH 7+.
They can;t use bleach - at that pH, you’d gave chlorine gas.
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pH?
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Sorbic acid is common to both of these poor preservastive systems and has stability issues. Experienced some “petroleum” odor - tho’ not with immediate issues on addition. Try something withoiut the stuff.
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better get an IRB for that sandpaper clinical
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Certainly chemcial and physical stabiluty assessment but no challenge testing. Do not see antimicrobial preservative as useful. Might look at similar large company products marketed.
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I’ll just cut to the chase - if your water is just 1-2% in propylene glycol - you do not need a preservative. 86 the phenoxy/EHG.
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You have a valid concern. Can you say more about the solvent and 1% water??
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perhaps it needs a preservative.
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You should post as a primary question.
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Hot filled tubes are certainly at very limited risk.
Why not make/package product and let your freinds screw around with it, encourage them to use and often in any way they wish - get it back and check for bugs.
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Good grief - forget Natacide and other mystery preservatives. Phenoxy is prob not great - flashing off at 100C, partitoning is not favorable with w-in-o and Gram negs are prob not your biggest risk. Please talk about the chemical not the commericial name.
Challenge - fail not because it’s unpreserved but because the challenge droplets with bacteria/fungi never effectively merge with water in your water-in-oil emulsions. The same phenomenon governs contamination in use. Unlesss exposed to water in use - your risk is fungal contamination under high humidity so phenoxy is not that useful. If direct exposure to water - preservative in water droplets in w-in-o prob won’t see the bugs and any preservatibe will not be effectively available. Bugs from skin don’t come woth enough water to grow.
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This reply was modified 11 months, 1 week ago by PhilGeis.
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This reply was modified 11 months, 1 week ago by
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Not sure you need a preservative. If really 100C, you’ll certainly eliminate process contamination. Is it hot fill? and what is package? Water in oil - are intrinsically less susceptible. Challenge testing is not suitable - it’ll prob fail preservative or no. You wonder where the glycerol is - if in water phase, it’ll have an effect. Where does it come in process?
Right - you’ll never get preservative in post process.
The real test would be in use.
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I’ve used it in disinfectants - consumers complained about skin irriation. Never used it as a cosmetic preservative.
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Absolutely NOT. Do not use phenyl phenol.
https://oehha.ca.gov/proposition-65/crnr/o-phenylphenol-listed-known-state-california-cause-cancer
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CoA should come from your supplier based on what is and what they can detect and control.
As to threshold for benzoate complexation, what is hydrosol % in product?