[Chemist77]

How about adding the PEG-150 DS to the already heated water, much easier way out. 

Re the clarity I guess you would have to choose the right combination of surfactants and thickeners, mind that it is not really easy to achieve everything easily with sulfate free formulations. 

Good luck.

[Chemist77]

Further to the formula structure I notice that you have almost reached 50% level with SLS. You can bring it down to 25-30% level, increase cellulose a little to maintain the viscosity. It might bring down the cost too. I have seen most formulations with SLES and I also work with it and I feel it is easier to handle and never creates an issue with the colors. Since I don’t see a solubilizer in the formula I am guessing clarity ain’t an issue with you.

[Chemist77]

Try what Perry has suggested, should work. If not then try the ethoxylated silicone that I suggested. But my recommendation might drop the viscosity a bit so be careful. 

[Chemist77]

@erin Well in the worst poss scenario a nut has been saved n u wud hv to stick to Sigma as I dont think anyone else wud be willing to supply sample sized quantities as commercial.

[Chemist77]

What if the left nut is missing

[Chemist77]

Keep the dosage of Na Metasulfite in check as it is known to cause dermatitis on sensitive skin.

[Chemist77]

I second Duncan on that with my own experience, I have been able to learn a bit working with pvt label players, go to a big brand and you have a restricted responsibilty or lets say limited pre defined job. Exceptions exist with degree of education.

[Chemist77]

I have seen microbial presence interfering with the pH which can lead to color fading as well. But as Duncan pointed out every aspect has to be checked even the stability of pigments as well.

[Chemist77]

@Perry I absolutely agree with you, it would need some in vivo testing to check it otherwise for a formulator there is no way to know the quantum of effect of different dosages.

[Chemist77]

@Duncan thats y I added wherever it can be used, with wisdom was silent

[Chemist77]

@Perry it is a skin protectant and anti-irritant, rest of the claims are too complex to just accept them at face value.

[Chemist77]

Well it is very simple, anything which the inside of human body can accept without problems then the exterior shouldn’t be a problem at all. They are definitely meant for cosmetics as well wherever they can be used.

[Chemist77]

@Perry the allowable limit it 0.5-2.0%, even at low concentration it is effective. So if he wants to use it he can lower the limit but the process has to be the same as I previously mentioned.

[Chemist77]

DOW CORNING® Q7-2587, 30% SIMETHICONE EMULSION USP is used to break gas bubbles in the human body. It is generally used in pharma industry. 

For personal care you can use Antifoam ACP 1500, it is used in food industry as well. 

But as Perry said without knowing the nature of formulation it is not possible to make a precise comment. 

[Chemist77]

If USP grade then it means food grade, it’s beyond comprehension why you are getting this anomaly. Maybe some processing difference from different suppliers. 

[Chemist77]

As per the literature available I think it should be added below 50°C, at higher temperatures it will dissolve and recrystallize on cooling. So the trick is I think prolonged mixing (dispersion) to a very fine particle size and which cannot be felt during application. 

Hope this helps. 

[Chemist77]

Can I mention cetostearyl alcohol as cetyl alcohol and stearyl alcohol in my ingredient list???????????????? I feel I can but I need to confirm if it is technically allowable???

[Chemist77]

Great job Perry, we all are glad to see everything hopping back to normal.

[Chemist77]

The types you have mentioned can use plant derived actives generally, you can use non ionic base for most formulations. Though stability and other parameters should definitely be checked. Some actives need a specific pH and that you have to mind while formulating, the suppliers shall be able to give you most of the info about the actives and how to formulate it. For emulsions you generally need vacuum mixers with homogenizers but you can use simple mixers as well though speed control is a must to avoid aeration. I am sure a simple mixer might help you, since you are starting new I suggest you go for crash cooling depending on formulation again. 2000L a month is a small quantity and I am sure it will not be a big problem for you.

[Chemist77]

@montela you have to specify which line you intend to produce, whether its personal care or color cosmetics or something else. This site is much more friendly than your expectations, state your line of products clearly and let us see what we can do for you

[Chemist77]

Thats a good combo u r using, if u were able to read old posts on this forum then u wud know that cetyl alc emulsions tend to thicken over a period of time. But since u hv a good choice of emulsifier I m sure u hv a fab recipe though if i had to use c16 then i wud add a little ceteareth 12 or 20 to keep the viscosity in check.

[Chemist77]

Chris without knowing the formulation ing it is difficult to comment though u can try peg12 dimethicone

[Chemist77]

hyaluronic acid and mucopolysaccharides form the building blocks for the connective tissue (which for a layman could be claimed as cells) and HGAG is claimed to have the precursors for the mucopolysaccharides with high amount of hyaluronic acid monomer, hyalobiuronic acid. 

This is a very basic explanation and I am not sure how precise it is but this is how I read it in suppliers’ literatures and other related material. 

[Chemist77]

@Duncan What a relief to see big names coming back here, expecting Robert, Chemicalmatt, Mark, et al to sniff it sooner. 

[Chemist77]

Dear Perry, 

Heartfelt wishes for working hard to make this site happen again.