LuisJavier
Forum Replies Created
-
wondering how thick an acacia gum ‘firm-hold’ product would feel and in what medium it would be stored in.
-
I wonder if 2% glycerin with 1% butylene glycol will feel tacky
-
which of the isomers of butyl glycol do I use? 1,3; 1,4; 2,3, etc?
-
Cheeky fact for me there haha. Which one is preferable for use in skincare?
-
The only problem with that is that many companies wish to send only to commercial addresses and not residential.
-
Thank you
-
What is a good starting solution dilution of sodium hydroxide? 10%/20%/25%?
-
Thanks Perry, I had forgotten about prilled versions.
-
NAOH seems best for now, it just seems like it will be a bit of a hassle to work with (wearing a dust mask-should be wearing one anyway). Many thanks
-
Upon re-inspecting the chart, I think that l-arginine is the weakest pH base since I recall reading that KOH is a weaker base than NAOH in o/w emulsions. Either way, l-arginine would be much safer to use and offer moistursing properties too. The downside will probably be cost as I have recently found a supplier selling NAOH extremely cheap comparing to what I’ve previously seen.
-
I can test some sodium bicarbonate I have versus l-arginine to see which one has a higher pH as I am not so certain from the chart. I am very surprised that an amino acid could do this. Then again, I am only a beginner-learner of chemistry.
-
What is a high internal phase emulsion?
-
That’s a good idea Cafe. I think I found a supplier who may not be charging the expensive shipping price after much searching.
-
Many thanks. 70% IPA solution it is.
-
I think I’ll just stick with the sodium hydroxide due to Pharma’s first comment. I can look into sodium carbomer too as an alternative. I would need to look into a supplier for it.
-
Many thanks for the reply. Is sodium hydroxide best (avoiding TEA)?
-
I read on this link that there is some inactivation. Is this false? https://www.americanpharmaceuticalreview.com/Featured-Articles/38885-Antimicrobial-Preservatives-Part-Two-Choosing-a-Preservative/
”benzyl alcohol [16], 2-phenoxyethanol [42], 4-chloroxylenol [20] and m-cresol [25] should not be formulated with non-ionic surfactants. Chlorobutanol [43] and 2-phenylethanol [37] are adversely affected by the presence of non-ionic surfactants, e.g. polysorbate 80.”
-
I thought NaturallyThinking’s carbomer was Carbopol 940 not Ultrez 30… If you look at the information sheet, it says both so it confuses me.
-
Thank you for your support
-
I am based in England
-
Also what solvents are Sepimax ZEN made with? I’ve been looking online but haven’t found the answer as of yet.
-
Isn’t residual benzene about as harmful as residual ethylene oxide or 1,4 dioxane in ethoxylated compounds such as phenoxyethanol or phenylethyl alcohol which is a reaction between benzene and ethylene oxide if I remember correctly, PEG-100 Stearate etc?
I think I will possibly end up going with one of the Ultrez polymers. Does niacinamide count as an electrolyte? I mean, it dissolves really well in water so I was wondering if it breaks up into ions? -
I think they might start to gel at around that pH but I think maximum viscosity occurs arround pH 7-7.5 so I don’t think that the viscosity at pH 5 would be very good (please correct me if I am wrong).
-
I don’t mind using DPG or MPG. I don’t know how much of a preservative booster DPG is though. I would love to use Hexanediol but I need to find a good source and then buy some. Essential oils - I’m aware that clove bud and tea tree are quite effective, or at least somewhat effective. I don’t know if I’d count on the EOs much though. pH 5 - that would be very tricky working with Carbopol 940. Chelating agent - phytic acid, zinc gluconate/sodium gluconate, disodium EDTA.
-
What does Aw=0.80 mean?