Formulating with Acids IPCS

Join Belinda Carli, Director of the Institute of Personal Care Science and Cosmetic Formulator, as she shows you how to incorporate various acid materials (AHAs and BHAs) into formulations. Belinda also explains some of the key compatibility, safety and regulatory considerations when formulating with acids to help ensure suitable end use products. Peel away the difficulties of formulating with acids and learn to formulate successful, efficacious and stable acid formulations with Belinda!

Happy formulating!

[reetabenny]

So i can just skip preservative in acid formulas?

[barbarachappuis]

Belinda, would you consider doing a video on formulating with Azelaic
acid? From what I've read, it is a great acid for many applications, but I also understand it is difficult to work with to actually gain the benefits. Thank you!

[bronwyn]

I have 85.5% distilled water for my serum formulation. The rest are extracts and gums. To keep to EU regulations of 4% how do I calculate that? Very confused.

[seximama]

hello, how long should contact time be at most when using an acidic product ?

[rossygarcia]

Hi Belinda, Can I use guar gum in this products? Thanks for your help.

[bronwyn]

Is there a video o/w emulsion using salicylic acid?

[tsitsichieza]

Thank you for sharing. I have guar gum, is it recommended for this formulation, if it is, then at what concentration and what stage do I add it?

[Skylightatdusk]

If I understand correctly, the final pH of the product should be < 3.85 pH to maximize the bioavailability of salicylic acid? What is the lowest pH to prevent chemical (acid) burns? Thanks

[equilibrio]

so the comparison for salicylic solvent is 1:5?, salicylic 1 and spiritus fortior 5, and we stir until completely dissolved the salicylic crystals?

[Kontraleah]

Is that 100% glycolic acid that you are adding to the 90% water solution? Or did you have to adjust for, say, a 70% glycolic acid solution?

[ritabaker]

Great video! Thank you.... But I have a question. If instead of a serum an AHA lotion was made in the same acidic environment, would you still omit the preservative? Thanks

[everyuseridtaken]

I tried to dissolve SA (1.5%) in propanediol (7.5%). I heated it to dissolve and it turned light purple but it did dissolve. However, everytime I added something it recrystallized. I only added rose water, glycerin, and witch hazel to create a toner. What am I doing wrong?

[jcnyvall]

Hi Belinda, would it be appropriate to use a 5% glycolic or AHA concentration in a toner. Can a 5% solution be used in a leave in product? Thx'
Janine

[Johanna-cxzp]

Hi belinda, i loved watching ur video ...
I always disolved Salicylic Acid with Propelene Glycol, without any heat at all ..

[Chrisie]

How do you know to put 6.35% to equal 5%? Is there a formula to figure that out?

[sumayiazaid]

Hi .m really love your videos.
Informative and sincere. I learned a lot
Thank you so much
I have a question about the gums used .. is it ok to use carrageenan instead .. it is the only gum I have in hand meanwhile plus I like the way it feels in the finished product

[glorialeonitekuttoo]

How can i use them without making my cream or soap turned watering

[andreamccall]

Hi Belinda, working with SA, if you choose to dissolve with Ethanol will the alcohol smell transfer into the finished product? Thanks :)

[Zehavs]

Question about lowering PH for lactic acid. What’s the best method and easiest?

Also I was told Hyaluronic acid isn’t an AHA and can’t be counted as one when it’s in combo with glycolic acid & lactic acid.

[MB-gkfu]

Hi Belinda, does the same protocol apply to L-Pyroglutamic Acid, when formulating skincare? If not which phase does this go into or step when formulating? And how much would I need to formulate a 4 oz clay cleanser?