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Are these preservatives compatible with each other?
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No, an airless pump container would be considered the preferred packaging component of your preservation system. These are the essential elements of a good preservation system, packaging included. The respective preservative system component ingredients are inexpensive, what take a risk when you don’t need to?
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@MarkBroussard great, thanks! Would it be alright to swap phytic acid for GLDA?
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Yes, you can use any chelant of your choice, just make sure that you use one.
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Hi Mark what about Disodium EDTA as a swap for the Phytic Acid? And if so what % to use? Or Sodium Phytate? Many thanks and if this is a stupid question let me know.
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Phytic acid is mostly sodium phytate wrongly labelled as phytic acid.I don’t see a reason why you couln’t swap it. -
Yes, you can use Disodium EDTA, Phytic Acid or Sodium Phytate. Generally in the range 0.1% to 0.2%. Be aware that if you use Phytic Acid it will shift your pH down and if you use Sodium Phytate it will shift your pH up, so add them while measuring the pH.
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Hii Mark,
I read all your reply on this thread and I thank you for sharing your knowledges to us here.
Btw I wanted to ask about purity of Sodium phytate, there is 90% and 75% purity. these two different purities have the same % to be use as cheltor? 0,2%.
Thank you in advance
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Great thanks so much Mark very helpful. Cheers
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MarkBroussard said:Squinny said:Hi Mark can you advise what % of each of PE9010 + Sodium Phytate + Sodium Benzoate you would recommmend? Many thanks
@Squinny: For a water-based serum: PE9010 (1%) + Sodium Benzoate (0.35%) + Pentylene Glycol (2%) + Phytic Acid (0.2%); pH = 4.6 to 4.8
If you’re working with an emulsion: PE9010 (1%) + Sodium Benzoate (0.35%) + Pentylene Glycol (2%) + Phytic Acid (0.2%) + Caprylyl Glycol (0.3%); pH = 4.6 to 4.8
Hi Mark, would Propanediol 1,3 work instead of Caprylyl Glycol? I have it in my formula at 2% already. Thank you.
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Yes, Propanediol would function as a preservative booster. Caprylyl Glycol is a bit better as it’s mode of action is to help weaken the microbial cell wall, but it does reduce viscosity in creams.
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MarkBroussard said:@Anca_FormulatorYes, Propanediol would function as a preservative booster. Caprylyl Glycol is a bit better as it’s mode of action is to help weaken the microbial cell wall, but it does reduce viscosity in creams.
Just curious @M@MarkBroussard, I would not assume Propanediol and CG would be swapped at a 1:1 basis (as far as hurdle technology is concerned). How much Propanediol would you guess would be needed to replace .3% CG? I actually use both…. CG at .25% (with Hexanediol also at .25%) and my Propanediol levels typically run at the 1.5-2% range.
For the most part I am using Propanediol as a glycerol reducer.
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Yes, I typically used Propanediol at 3%. Caprylyl Glycol at 0.3%.
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Thank you Mark.
@MarkBroussard What are your thoughts on Jeecide CAP 2(by Jeen): Caprylyl Glycol (and) Phenoxyethanol (and) Hexylene Glycol?
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@MarkBroussard Can the Euxyl 9010 Hurdle approach above be effective for a toner made with 50% organic hydrosol (from a reputable source, with a COA, but unpreserved by manufacturer) that also contains some hydrolized protein extracts? Has 5% glycols.
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Anca_Formulator said:Thank you Mark.
@MarkBroussard What are your thoughts on Jeecide CAP 2(by Jeen): Caprylyl Glycol (and) Phenoxyethanol (and) Hexylene Glycol?
Yes, this would work in emulsified products. You would need to couple it up with Gluconolactone (and) Sodium Benzoate
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Anca_Formulator said:@MarkBroussard Can the Euxyl 9010 Hurdle approach above be effective for a toner made with 50% organic hydrosol (from a reputable source, with a COA, but unpreserved by manufacturer) that also contains some hydrolized protein extracts? Has 5% glycols.
Sure, but you need to couple it up with Gluconolactone (and Sodium Benzoate, chelator, low pH, but it should work
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Thank you!
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MarkBroussard said:Anca_Formulator said:@MarkBroussard Can the Euxyl 9010 Hurdle approach above be effective for a toner made with 50% organic hydrosol (from a reputable source, with a COA, but unpreserved by manufacturer) that also contains some hydrolized protein extracts? Has 5% glycols.
Sure, but you need to couple it up with Gluconolactone (and Sodium Benzoate, chelator, low pH, but it should work
I can only find Gluconolactone as part of Geogard Ultra powder (Gluconolactone (and) Sodium Benzoate). If that works, what percentage for the toner (supplier says 0.75% - 1.5%)?
Thank you.
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If you use 1% PE9010 + 1% Geogard Ultra + 3% Pentylene Glycol + pH =4.8, you will be in good shape
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Thank you Mark!!
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I think everyone should say a huge THANK YOU for Mark’s time and for sharing his amazing knowledge! We all can learn something new and we do (at least I do) very much appreciate it. So thank you @MarkBroussard
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Totally agree
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@MarkBroussard Hi Mark, I followed your suggestion of
1% Euxyl PE9010 + 1% Geogard Ultra + 0.2% sodium phytate + 2% Propanediol + 3% Pentylene Glycol + 4.8 pH for 200 g Toner
I added the Geogard Ultra powder last, and stirred with the magnetic stirrer for 15 minutes, I also tried heating it, but I just couldn’t get the Geogard to fully dissolve. I did some research and it seems that a lot of people have this issue with Geogard Ultra.
Is there something else I can use in its place that’s more user friendly?
Thank you
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Geogard Ultra generally goes into soluton fairly easily. Try adding it first.
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@MarkBroussard: Thank you. i will try that.
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I can only find Caprylyl Glycol in bulk, but I did find a smaller size Caprylyl Glycol EHG (includes 27-33% ethylhexylglycerin).
Since Euxyl PE9010 already contains EHG, what percentage should I include it at to replace it in this preservative system
1% PE9010 + 0.35% Sodium Benzoate +2% Pentylene Glycol + 0.2% Phytic acid + 0.3% Caprylyl glycol?
I was thinking 0.45%? That would replace the 0.3% and add an additional 0.14% EHG (roughly) to the formula. Does that work?
Thank you
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