[chemicalmatt]

@Abdullah  perhaps try a modified nonionic cellulosic such as hydroxyethyl cellulose, hydroxyproyl methylcellulose, or methylcellulose. 

[chemicalmatt]

Octyl Palmitate for heavy longer playtime, Isononyl Isononanoate or C12-15 Alkyl Benzoate for anything else.

[chemicalmatt]

Of course it is feasible on an industrial scale, and a not-very-industrial one too. Go into any Buff City Soap store in the USA (Handcrafted Soaps & Skincare - Made Locally – Buff City Soap Supply, LLC) and you’ll get the picture right up close. Basic idea: compound sodium bicarbonate & citric acid together with a binding agent and make sure it stays dry. Coated bicarb costs more but will do even better.

[chemicalmatt]

@helenhelen and @ketchito I’ll add here that butylene glycol will detackify just about any humectant, though a negligible humectant itself, at a low level too. (Your other thread about glycols is refenced here too.) Butylene glycol has always been the most versatile of the lower glycols for this reason. It has zero antimicrobial activity though. It also detacks sticky things like xanthan, acrylate polymer films. If you liked that formula you posted, you’ll like it even better with a bit of BG.

[chemicalmatt]

@sean9980
I’ve used the standard commercial grade KOH which is 40% active solution at 1.4:1 (Synthalen K or Carbopol 940), at nearly a 1;1 replacement with TEA 99%. You may do the algebra and figure from there.  You may also sub with Trolamine 40% (still good & still legal) at 3.2:1 ratio. Trolamine is  the best to use when neutralizing carbomers within a cream or lotion or shave cream.    

[chemicalmatt]

Aha! @ttk102360 …that’s much better. Heres the problem: you are formulating a high internal phase (H.I.P.) w/o emulsion and you a) do not have a mineral salt to stabilize so ADD NaCl at 1.00% to the water phase; and b) adding a high MW polymer to the disperse phase is a recipe for failure, so DEL the hyaluronate; and c) you have way too much polyol for a stable w/o emulsion like this so REDUCE that glycerin & propylene glycol way down. What you experienced is the phenomenon where inverse-phase emulsions exhibit a viscosity response to sheer (homogenizer, right?) but that viscosity will diminish due to the entropic instability of your formula due to chemistry. 

[chemicalmatt]

@MurtazaHakim
The stated active on any Drug Facts label is % active ingredient solid state, never a factored solution. Your formula will indeed require ~40% of the standard 40% cetrimonium bromide material to meet the monograph claim. They dilute this at site, as you know.

[chemicalmatt]

@Michelle76
Absolutely you may. This leaves a soft non-matte film on the skin. I’ve formulated PQ-7 into shave and after-shave products for years. Does not hurt foam on the “shave” end, leaves a nice skin feel on the “after” end. Steer clear of anionic emulsifiers if it is to be a cream or lotion. Using the typical 10% active commercial product you don’t need much more than 2.00% w/w either.

[chemicalmatt]

@Zara Then again there is the Draves Test. Many surfactant makers will publish their results. And @Pharma makes a good point, surface charge may factor but not absolutely. E.g. PEG-12 Dimethicone has better surface tension reduction (read: detergency) effect than some anionics.
 

[chemicalmatt]

@ttk102360 not enough information and too many reasons to go into here.

[chemicalmatt]

@AnnaUnce Alpha Arbutin is not greatly water soluble. That would be my guess, especially since it’s floating not sinking. 

[chemicalmatt]

@Amjad
The established OTC monograph level of BZK is 0.13% w/w in the USA.

[chemicalmatt]

First off: you are not a fool, and there are no judges in this forum ( if they lurk they need to leave), so you came to the right place. Which silica are you using? If the Aerosil (Evonik) range is employed, I would double the amount to 2%. Great suspension, no need to change. I would also add another wetting/dispersion ester (there are many) to go with Finsolv TN and more of both; decrease the cross-polymer accordingly.  Then there is your technique. Mix the silica into the esters at high sheer for a long time to absorb and disperse, then add the other ingredients, cross polymer last.  You have a lot of TiO2 and ZnO in there too. More than SPF 30. Why go any higher?

[chemicalmatt]

You are using this as an opacifier, right? I agree with @ketchito
and @Benz3ne too: a lot of things can go wrong there without knowing what you have.

[chemicalmatt]

What Mark Fuller said…OTC Land here you come. The lidocaine base is only for lipid-based formulations or emulsions with high oil loads like the tattoo pain-relief applications. If you have a high oil load in there, switch out to the free base. 

[chemicalmatt]

You are right, sir, there aren’t any Standards that I know of unless the resin makers have one. I think your protocol will do fine, all the same, no hotter than 40C. My own experience: PVC & PETE cylinders fail the most, especially if the product has a high oil load content. HDPE holds up better since it has higher vapor permeation. Ovals of any resin will do OK depending on the size.

[chemicalmatt]

For small quantities at lower prices than those on Graillotion’s helpful list, I’ll add Universal Preserv-A-Chem (www.upichem.com) for many  - but not all - cosmetic ingredients, even top brand ones.  

[chemicalmatt]

Fekher, please instruct us. “Emulgate” is ??  Also, should your product spray or be sedentary to diffuse into room?

[chemicalmatt]

You may thicken and stabilize SLS/SLES and other shampoos with Synthalen W400 or W2000 from 3V Sigma also, and these do not require the back-acid build as does Lubrizol’s Carbopol SF-1. Jus’ sayin’

[chemicalmatt]

Mysterious thing there PeiHoong. Only thing I can think  of is ratio of mineral dispersives (esters) to minerals is about 2:1, a somewhat high load. I include the mica & talc with the iron oxides and do not include polyisobutene with the dispersion medium.  (Not sure how good COSMOL 222 is in dispersion compared to the other 2 esters). Which Bentone Gel are you applying? There are different solvent bases in those. 

[chemicalmatt]

Amjad, do not add hydrogen peroxide to an ethanol hand sanitizer gel, 60% ethanol is MORE than enough preservation and you’ll need to passivate your vessel if adding peroxides. Forget the WHO formula. Far more ingredients are incompatible with peroxide (i.e. aloe vera gel) than they are with any other ingredient, including carbomers. Add glycerin if you want, it is cheap and no need to include PG,  but a PEG-ester or PEG-ether dimethicone is much better. Secondly: always add Carbomer to water first, disperse as best you can, then add ethanol and mix well before neutralizing. Carbopol 940 is worst, Ultrez-21 is much better, Seppigel MAX (Seppic) is a little better than Ultrez, and RapidGel EZ-1(3V Sigma) is best of all. With that you can just mix everything together until its all dissolved and uniform then add the RapidGel to thicken. Easiest, cheapest way to go.

[chemicalmatt]

I meant do not use lecithin or any phospholipid in the same formulation as a cationic of any sort, it will destabilize your product. You are correct in sensing a fight going on. Oil load should be limited to TG’s and esters, dimethicones or good  ‘ol mineral oil.

[chemicalmatt]

Emma, that one you have will do fine in nearly any application. The lower MW ones trend to the 500,000 Dalton range.

[chemicalmatt]

DMDMH - absolutely a better choice and pH stable throughout your effective range. 19% total solids is not too high for a good shampoo, and if you increase the amphoteric while reducing/eliminating those other  materials, you will have a much better product overall - and less expensive too. 

[chemicalmatt]

Dimethicone only, and use higher MW such as 1000 CST, works best with low MW PQ10.