fareloz
Forum Replies Created
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So you have adjusted pH of acids, added solution of SA with PG and DMI and got higher pH? How this even possible?
SA is known to be stubborn. 20% of PG is definitely not enough.
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Regular soap?
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Most extracts in skincare are glycerin based. When manufacturer add the extract they have to list glycerin too. Since extract is most likely just a marketing ingredient and added on 0.01% amount to have it on the label, I don’t think there is an issue to mix 0.01% of glycerin with 99.9% oils. If it precipitates you won’t even notice. So your product is basically a mix of 2 first ingredients
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Not sure where are you located, but note that Ethoxydiglycol is allowed only up to 2.6% in sprays in Europe https://echa.europa.eu/cosmetics-restricted-substances/-/legislationlist/substance/100.003.563
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This post is obviously just a sophisticated ad of the website attached in the text
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Wee need report user/message feature. The forum has grown and first spam messages already here.
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Sorry, but I can’t believe you have ever prepared this formula. Salicylic Acid 1% will not dissolve in water solution.
Also, Alpha Arbutin requires 5-7 pH value to be stable and Lactic Acid is mostly neutralized in this pH range.
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Nothing wrong, these gel-formers do not tolerate low pH and electrolytes. It’s better to read recommended usage from manufacturer before trying.
I would suggest to use gums instead. For example Xanthan Gum, very reliable thickener. Or Hyaluronic acid (high molecular).
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Is it some kind of two-phase product to shake before use? If so you don’t actually need an emulsifier. Shaking will disperse the oil and create temporary emulsion
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I found the exact INCI:
- Water 50-75%
- Lactic acid 30-50%
- Sodium Lactate 5-10%
- Magnesium Lactate 0.1-1.0%
- Calcium Lactate 0.1-1%
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I thought saponified oils is basically another term for a plain soap…
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The reason why Sodium Lactate works is that it “neutralizes” part of Salicylic Acid.
SA + Sodium Lactate -> Sodium Salicylate + Lactic Acid.
Sodium Salicylate is very soluble in water. So you don’t have much of a free acid in your solution.
Same with Sodium Citrate.
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And from here http://www.thecosmeticchemist.com/molecule_of_the_week/guar_hydroxypropyltrimonium_chloride.html:
The dilution and deposition phenomenon occurs when the system is diluted below the critical micelle concentration of the shampoo surfactants, resulting in the formation of the insoluble coacervate
I assume you’ve got insoluble coacervate due to high dilution (too much water?)
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I think Abdullah is right. I just googled the component:
Guar hydroxypropyltrimonium chloride is commonly used as a conditioning agent in shampoo formulations. It forms a coacervate with anionic surfactants from the shampoo formulation upon dilution
So it seems anionic surfactant is causing the problem.
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Your response is such a deja vu to me..
I have a lot of conversations on reddit where people spam me with one-minute googled titles of studies and I spend hour to read them and explain why those studies are irrelevant.
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How can we report this user for ads?
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Sorry, but your friend ether lying to you (because no way SA can be soluble in this solution) or has no clue of what he is doing. It is too many actives to combine in one product and they are not compatible in terms of pH.
BTW what is the pH of your product?
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You can always check the products on the market. For example I googled several two-phase hair sprays and found that they all use combo of some volatile silicone (like Cyclomethicone) + cationic surfactant (like Cetrimonium Chloride).
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Not sure what’s wrong with your ingredients, but Azelaic acid is soluble in pure PG. Here you can see it: https://youtu.be/VssxLD7skQA
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Ah, I see, another clean beauty ad.
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This is very helpful, thank you! I checked SDS on DeLonghi one and found only the pH, not concentration. Maybe I overlooked it:
But they also provide density, maybe I can calculate how much acid based on density.
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FDA is only valid for USA though.
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Under pH 2.5 Lactic acid is about 96% acid and 4% Sodium Lactate (if neutralize with NaOH). It can be in different amount:
1. 20% water, 76.8% Lactic acid, 3.2% Sodium Lactate
2. 40% water, 57.6% Lactic acid and 2.4% Sodium Lactate.
Both formulas have pH around 2.5.
What I am wondering is how much acid is usually used in descaler solutions.
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I’m confused, what is revolutional in your post then? Liquid soap is a product of ages.