Question
Posted on: August 19 2014We have a problem with following preparation: Urea 20%, propylene glycol 60%, lactic acid 10% in viscous solution AD 100 ml.
We have taken collodion for viscous solution, because this is for a nail. The solution did not dissolve, when heating started to solve this. When cooling off, this was no longer a clear solution.
Answer
Collodion is a solution based on alcohol and ether in which urea is certainly not soluble. I think it is appropriate here to try to make the mixture Visceuzer using Carbomeer. Add small quantities step by step. Add