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Would this be enough?
Hello! If I preserved my hair gel formula with Phenoxyethanol, Caprylyl Glycol, pentylene glycol, and disodium EDTA, would this system be robust enough to pass testing or would I need to add something else?
Thanks in advance!
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29 Replies
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@Newtoformulating: It depends on what else is in your formula and the pH…
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@Anca_Formulator water, Ceteareth 25, Acudyne 1000, AMP, pentylene glycol, EDTA, Phenoxyethanol, Caprylyl Glycol
pH between 6-7
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You need an antifungal too.
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Perhaps a fungal gap, less so Gram + but it’ll prob pass USP 51. Why mult. glycols?.
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@Abdullah I thought about using Mikrokill COS (Phenoxyethanol, Caprylyl Glycol, chlorphenesin)which will add chlorphenesin to the mix. Your thoughts on that?
@PhilGeis so could I just drop pentylene glycol and Caprylyl Glycol take its place if I decide to go with what I mentioned earlier?
I also thought about using Euxyl k940 ( Benzyl Alcohol, Phenoxyethanol, Ethylhexylglycerin, and Tocopherol) then add pentylene glycol and EDTA as boosters. Your thoughts?According to Ashland’s website: Ashland Ethylhexylglycerin is stabilize with synthetic alpha-tocopherol. (Not sure if that means anything)
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Mikrokill COS will be good at pH ≤5. At pH 7 look for PhilGeis suggestion.
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Mikrokill COS + EDTA would probably work for you at pH between 6 and 7
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Tocopherol is typically used with benzyl alcohol to limit oxidation.
Mikrokill COS + EDTA is ok for leave on. Would prefer EHG with phenoxy but Cap glycol can’t hurt. There are better combinations for surfactant-based products.
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@MarkBroussard
@Abdullah
Thank you both for responding!@PhilGeis so I may need to stick to Euxyl k940 that has the phenoxy, EHG, Benzyl Alcohol, and Tocopherol. Then add pentylene glycol and EDTA.
If could suggest a better combination I’m definitely open to suggestions if you think that system would be weak. Thanks!
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@Newtoformulating
What’s the product type/general comp? -
@PhilGeis It’s a water-based edge control/sculpting gel. The viscosity is high( consistency of creamy peanut butter.
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Think the pentylene glycol is not necessary. Benzyl should work vs fungi. What is pH?
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@PhilGeis It will be between 6-7. I’ve made some changes to the formula since the last official pH check but that’s the pH range I’m aiming for… so Euxyl k940 + disodium EDTA should work and get rid of the pentylene?
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Think so - give a test.
What’s packaging? -
@PhilGeisis benzyl alcohol anti bacterial or anti fungal?
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You’ll probably want to keep a glycol to help solubilize the Euxyl K940 which will have limited solubility in a water-based product. Does not need to be Pentylene Glycol, you can use 1,3-Propanediol to reduce the cost.
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@PhilGeis It’s a jar. I know, I know that’s the worst thing to put my product in but at the moment in this stage of development that’s all I can do. I would love for my formula to be in a tube to reduce contamination but it’s just not feasible at the moment. That’s why I’m looking for a robust preservation system.
@MarkBroussard ok thanks. I will order 1,3 propanediol. Would it make sense to add Peg 40 hydrogenated castor oil to help with solubility along with 1,3 propanediol or just use the 1,3 propanediol?
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No, that should not be necessary. Just premix the Euxyl in 3% propanediol and add that to you water phase with rapid stirring should do the trick.
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@MarkBroussard Thank you! This is very helpful information!
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Newtoformulating said:@PhilGeis It’s a jar. I know, I know that’s the worst thing to put my product in but at the moment in this stage of development that’s all I can do. I would love for my formula to be in a tube to reduce contamination but it’s just not feasible at the moment. That’s why I’m looking for a robust preservation system.
@MarkBroussard ok thanks. I will order 1,3 propanediol. Would it make sense to add Peg 40 hydrogenated castor oil to help with solubility along with 1,3 propanediol or just use the 1,3 propanediol?
Why are you not using a flip top bottle. It is cheaper and better than jar.
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@Abdullah I don’t think that will work for my product because it is so thick. It is not running at all. Most of the product would stay in the bottom of the bottle and the consumer would end up opening it to try to get the product out of the bottom. I would really need a tube similar to but shorter, like a toothpaste tube, but I lack the capability to package in a tube.
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If you are are a startup, bottle is better for you than jar in any way.
- it is less expensive
- it is easier to preservative the product in it- high viscosity cream only has more thickener than low viscosity. No other difference. You can reduce the thickeners and save more money.
- easier to make lower viscosity product
- easier to fill lower viscosity product. -
@Abdullah you have made some really great suggestions. What do you think about my product being an edge control/sculpting gel in a bottle?
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I don’t have experience in hair gel but all my products including emulsions are in flip top bottle.
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@Abdullah it’s worth me looking into. Thanks!
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