chemicalmatt
Forum Replies Created
-
Not enough to go on here. What are you using in place of PG, SDA-40?
-
@Bill_Toge is PG-4 oleate a Stephenson (UK) item? Hard to get in the USA.
-
Hello Vinda. I know that BASF opened a R&D center there in Lagos, so there must be distributors. Brenntag (Deutschland) is the largest specialty distributor in the world, so check if they have an office in Africa. It may be in South Africa. Many chemical firms have offices in Dubai that serve Middle East & Africa. Good luck.
-
Sounds dubious to me, Sara, especially if it is an oil. Wouldn’t that be inactive in the aqueous portion of the formula? No chemistry mode of action was given either.
-
There are none. It is safe to use as is. The deal with Cocoamide DEA isn’t the alkanolamide itself but its residual amine monoethanolamine (MEA) that is the Bad Actor.
-
I will advise: I have never faced this problem. Having said that, you state two problems. First is instability, second is gas generation. You likely have more constituents than the ones you mention so this is speculative. For stability, you’ll need to use only alkyl ether ethoxylates to handle that much electrolyte. DEL the PEG ester and GMS please, and use Steareth-20/Steareth-2 or similar. As for the gas, if you have any amino-functional group, or amino acid, even DMDM Hydantoin or urea in that formulation it will react with glyoxylic acid slowly leading to oxidative decarboxylation, the reduction product being carbon dioxide. If there are no amino-functional materials then I don’t know where your gas is coming from unless you chose to put sodium bicarbonate in there. You would have seen that Fizzy Experience right away.
-
You are encountering one of the steadfast rules of emulsion chemistry: avoid adding strong electrolytes to o/w emulsions at any time, but if you must, then add while at elevated temperature. IF it were w/o or w/Si, that’s a different story.
-
Dr Sara, you answered your own question correctly. The anion based on the primary fatty acid source is termed -ate, as in olivate, meadowfoamate, cocoate. The alkali metal cation is obvious and named first. Should you have more than one fatty acid comprising the soap made in situ, name them all or just name the primary one (who’s checking anyway, right?). No need to list the free alkali: a common blunder that scares off sales when a consumer reads Sodium Hydroxide and is essentially meaningless when you consider the stoichiometric equilibrium.
-
If a serum-like consistency is your goal, I’d use hydrated silica. You’ll need high-sheer equipment, but you can tailor the viscosity outcome. Hydrogenated Castor Oil works OK too for low-viscosity oil thickening, depending on what else is in there.
-
That is a Hayashibara ingredient sold in the US by DKSH North America. I’ve never heard of it. Sounds like Saccharides City there, which makes sense for foam enrichment. Happy trails.
-
As a rule - and others may disagree - an oil load that high should be incorporated with the primary o/w emulsifier in a separate phase, Arlacel in your case. Rosehip oil is pretty stable at 65 - 70C, and you won’t be elevating its temp for days, just a few hours or so. I’d change processing sequence.
-
Depending on what’s in that surfactant blend, Jenny, it does not appear obvious what would do that. I’ve had viscosity drops with HEC and proteins, enzymes and other amino acid derivs but HEC is generally pretty robust as you know. Leucidal once dropped a cleanser formula built with HEC; that has enzyme qualities is all I could figure.
-
Kaolin would be my first suspect. Adsorbs certain compounds like activated carbon does sometimes. Nothing else in there would cause this as far as I can see.
-
Abdullah: affirmative. That ampho works in synergy with the anionics you mentioned to build viscosity.
-
One word: silicones!
-
Did you activate it with a tiny bit of alkali? Try it after wetting out at high-speed for at least 30 minutes and you’ll see it gel. You are dispersing the HEC into the RT water at the start, before adding anything else, correct? If not, that would be the problem too. Also, what is PE82???
-
Joana, you will need to apply a rubber (better, Teflon) spatula around the outside perimeter of the beaker counter to the spin direction of that homogenizer head, trying to avoid contact with that monster. Industrially, we call this “double-motion.”
-
Marit, all those folks are fooling themselves into thinking their products are legit, or they are just gaming the system while they can. EV told you right: read up on 21CFR, follow the monograph for SDA and register with FDA. You need only assay the ethanol to validate, and GC with flame ionization detector does that easily as does a density meter if you know how.
-
Certainly seems to be a growing market for this , at least here on the South Side of Chicago. Humor aside, peroxides do the job Farrukh. Get hold of some coated sodium percarbonate - and keep it dry! Add to it a small amount of tetra-acetyl ethylenediamine (not EDTA) to activate when added to water. Voila! gets rid of bloodstains, mold, all kinds of nasties. Now, as for those fingerprints …..
-
Your fragrance likely has a nonylphenol ethoxylate as solvent-carrier. Crashes viscosity all the time.
-
You answered your own question here, Jeff: Chinese clone of Carbopol. Even Carbopol itself either 940 or 980 or 934 will not be crystal clear in that system. Try Ulrez 21 or RapidGel EZ1 (3V Sigma USA) if you just HAVE to have clear. Also, I trust you meant triethanolamine, not triethylamine? The former is OK the latter is a lachrymator.
-
@mhart123 what Bill Toge is saying (nil heavy metals = no concern = nothing to report) applies to your greater need as well. Impurities and byproduct present at insignificant amounts need not be reported to CA. You are not reporting these in your INCI label copy, right? State of CA is not running everyone’s products through a GC/MS in their secret highly-staffed-with-pensions State Chemistry Lab. Just like CARB and “organic” claimants: it is the litigator trolls you have to watch out for, not state regulators.
-
I can highly recommend these folks here in Chicagoland for microbiology.
http://accugenlabs.com/ -
That’s a good place to start. Looks like you’ve figured it out.
-
You may want to avail the used market for that incubator - Equipnet has plenty at all price ranges - see link below. As for viscometers, Brookfields are the known Standard, so look around for a used one, preferably an RV with helipath for those creams. The older models with analog meters never die. Built to last back when “Made in America” meant something.