I've read the threads on using triethyl citrate (TET) as a buffer for urea (10%) cream - from what I understand, I would add the TET directly to the formulation? But that doesn't seem right?
I would assume like when using NoAH or Citric Acid - I make a solution first? What would I use as the solvent? Water? Glycerine? What percentage would I use? Should I make a 1% solution? Or a 50% solution?
Then I had the thought that I have sodium caproyl/lauroyl lactylate (and) Triethyl Citrate - could I use this in an attempt to lower offset pH rise in an urea hand cream? Anionic W/O Emulsion.
I know this is a bit of a newb question but I've searched and not found much other than a couple of patents and studies - but they weren't necessarily in relation to cosmetic formulation.
I am studying dip in personal care formulation - so I am learning. I just need some direction - I know it's not an easy thing to stabilise. I did have some success with a low percentage (5% - formula follows
) but there seems to be debate about whether it does anything. My partner has awfully cracked hands and I've made them a cream that seems to help but I really would like to add more urea. My Basic Formula:
% G Ingredient
q.s to 100 Water
barbadensis Leaf Extract
4.00 glyceryl stearate and PEG-100
Oleifera Seed Oil
Urea (and) Iodopropynyl Butylcarbamate
Polyricinoleate (and) Glycerine