PhilGeis
Forum Replies Created
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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 7 months, 2 weeks ago by PhilGeis.
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This reply was modified 7 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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Do NOT trust your preservation to hydrosols - in whole or in part. If preservation is the only reason for their intended use - use is unreasonable.
These are not magic - they’re a mixture of unknown composition. To your question - you have no idea what’s in the stuff. From contaminants from production to pesticides from agriculture and most importantly the compounds putatively responsible for implied efficacy.
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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 7 months, 2 weeks ago by PhilGeis.
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This reply was modified 7 months, 2 weeks 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?
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Thanks for clarification. Kinda doubt would be enough copper to screw up your benzoate. Look for the blue complex and precipitate.
Can you get your supplier to put Cu on CoA?
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I understand this stability slot is not your choice. Regret I have no solution for you other than its elimination.