MarkBroussard
Forum Replies Created
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Either Olivem 1000 or RitaMulse would give you a nice, light emulsion for an eye cream formulation.
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Shhhh … I’m working on an all-natural SlipperyClit Hot Gel.
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Pity that your boss has her heart set on following her competitors instead of paving your own path with a unique product offering. You don’t need a gelling agent with a mid-weight Hyaluronic Acid … the Hylauronic Acid IS the gelling agent.
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You could make your life a whole lot simpler by using a mid-range Hyaluronic Acid as your thickener and gelling agent as opposed to Natrosol and Silicones. It’s natural, it will be slippery (or slippery enough for your purposes) and it’s simple to use relative to the approach you are not taking.
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Yes, you need to add either NaOH or KOH to bring the pH up to neutralize the Stearic Acid for it to thicken.
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@Doreen81
Oak Kernel Flour or Colloidal Oatmeal … it’s a cosmetic ingredient … use it at 2% and everything will be just fine.
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@Doreen81
Why don’t you consider using Oat Kernel Flour … inexpensive and it should be readily available as opposed to Oat Kernel Oil.
Since you have limited options … what Emulsifiers do you have access to and then it would be easier to give you some guidance from a list that we know you can purchase.
If your clients like Colloidal Gold … fine, put it in there. There’s a saying in business “Feed the dogs the dog food they want to eat”
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Why are you waiting to add the Avena Sativa Oil until cool down to 45C. This is a major component of your oil phase … You should be adding it with your emulsifiers and the Shea Butter.
2% Cetyl Alcohol should be just fine to thicken your emulsion.
As @belassi pointed out … your issue is that you’re not adding a thickener/stabilizer (ie: gum) to your water phase prior to forming the emulsion. Add 0.3% Xanthan Gum to the heated water phase. That should help out considerably.
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Yes, pre-disperse the Xanthan Clear in Glycerin … For this application, start with 0.4% Xanthan and 2% Glycerin. Just add the glycerin to the xanthan and mix … it will form a slurry. While your water phase is stirring, slowly drizzle the Xanthan/Glycerin slurry into the stirring water phase. Let it stir for about 15 minutes to hydrate.
Adjust the amount of Xanthan up or down until you get the combination of thickness and skin sensorial you find most appropriate.
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Doreen asked a simple question … and it has a simple answer:
1% Phenoxyethanol + Dehydroacetic Acid + Potassium Sorbate will provide adequate preservation of virtually any cosmetic formulation she develops if she keeps the pH below 5.5.
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Seriously, does anyone really think that a 1% Phenoxyethanol, Dehydroacetic Acid & Potassium Sorbate combination at pH < 5.5 in an airless container stored in the refrigerator is not going to adequately preserve Doreen’s product which is purely for personal use over a 3 month period?
Doreen, you should be just fine on preservation.
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@Doreen81:
You really have nothing to worry about given the preservatives you have listed in your original post, particularly if you are using airless containers and given the pH end point of your products under pH 5.5.
Benzyl Alcohol (88%) + Dehydroacetic Acid (8%) + Glycerin is a well-established commercial preservative that is ECOCert.
Phenoyxethanol and Benzyl Alcohol are relatively interchangeable and have very similar chemical structures, but Benzyl Alcohol can be an allergen and can also cause discoloration over time.
So, if you wanted to use:
Phenoxyethanol (88%) + Dehydroacetic Acid (8%) + Potassium Sorbate (4%)
as a base all-around preservative, you’d be in good shape, particularly keeping your pH under 5.5 and using airless containers … just use it at 1%.
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Yes, you should adjust pH for the vaginal environment at the end.
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Nope
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@Doreen81:
Propylene Glycol (maybe 20%) + 1% Sodium Citrate will probably work to solubilize 1% SA.
SA in an airless container may not require additional preservation, but SA is not broad spectrum … I’d throw in some Sodium Benzoate to cover mold … or better yet, use Gluconodeltalactone + Sodium Benzoate as your preservative.
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You’ll want to first disperse the Natrosol in the water phase and then adjust the pH after the Natrosol is dispersed to activate the cross-linking, then heat. What specific variant of Natrosol are you using?
It will help to reduce lumps if you first pre-disperse the Natrosol in PG. Combine the PG and Natrosol and mix to form a slurry, then drizzle that slurry into your water phase while stirring @ 500 RPM or so. Let it stir for 10 to 15 minutes, then adjust the pH and begin heating.
You would make an additional pH adjustment as your final step in the formulation. If your product has water in it, it has a pH.
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@Doreen81:
The end pH is adjusted to 3.5 for a couple of reasons …
(1) Although SA is a beta acid, the regulations for alpha hydroxy acids is a pH or 3.5 or higher, so I would suspect the pH adjustment of this formulation to 3.5 is following that guideline.
(2) At pH levels below 3.5, you often get SA precipitating out of solution.
The LOI you listed seems a bit odd to me in that it contains more Citric Acid that SA and then an adjustment with Sodium Hydroxide.
Methyl Gluceth-20 is a good solubilizer of SA … it would have been easier, in my opinion, to just use Methyl Gluceth-20 and 1% Sodium Citrate to dissolve the SA and perhaps Sodium Lactate to adjust the pH. The Sodium Lactate provides moisturization … Citric Acid and Sodium Hydroxide do nothing for the skin other than adjust the pH.
This formula can be made in one pot heated to 55C into which all ingredients are added, so you can just throw in the EDTA at any point in time, but I generally add the Chelants early in the process.
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Certainly, Personal Lubricants are regulated at 510K Medical Devices since they are intended to be used in the vagina as opposed to on the vagina … this is the same regulation as for lubricated condoms and the testing required of of Personal Lubricants is actually the same as the testing for lubricants on condoms. Your personal lubricant is applied to 800 condoms and the same tests are repeated 800 times.
Vaginal Rinse … I am not certain, but I would suspect they would likewise fall under a 510K classification as they are designed to be used in the vagina.
Anal Cleanser/Wipes … I suspect these would be similar to Vaginal Stimulation Gels which are regulated as cosmetics since they are designed to be use on the the surface of the vagina/clitoris as opposed within the vagina.
Now, if your anal cleanser/wipe is intended to be used by someone actually inserting their finger in their butt … well, that’s probably a different story. But, anal wipes should be under cosmetic category unless your wipe solution contains an OTC drug ingredient.
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While Cyclopentasiloxane is volatile, you do not need to cool down that low before incorporating it into the emulsion … cool your emulsion down to 45C or so and then incorporate the Cyclopentasiloxane under homogenization. You really don’t need to add more than 0.5% to 1.0% unless you have some specific reason for adding much more. No need to mix it with alcohol.
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I’d say it’s probably safer to put on a nipple than on a clitoris … but, heed @Bill_Toge‘s warning, and dilute it to 0.1% … don’t put it on neat for godsakes.
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LOL! @Chemist5000! … Have you ever tasted Vanillyl Butyl Ether? … LOL!
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Nothing beats a fertile imagination and an agile tongue.
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Viagra and Clitoral Stimulants … not exactly a direct correlation … in one case you’re increasing blood flow through internal (via a drug) vasodilation … in the other case you’re trying to increase vasodilation by putting known skin irritants on the clitoris and tricking the nerve endings into thinking they’re feeling something … the warming/cooling agents.
I’m curious if any women have tried taking Viagra to see if they observe any enhanced stimulation?