Question
Posted on: March 6 2013A lotion full of incompatible anions and cations Burow water 2 G chlorbutol 2 G salicylic acid 2.5 g zinc sulfate 150 mg dexamethasone 40 mg Cetromacrogol Lotion AD
50ml
< BR/> Lotion breaks after adding Salicylz, chlorbutol, zinc sulfate
< BR/> Lotion breaks after adding Salicylz, chlorbutol, zinc sulfate
Answer
Cetomacrogol is incompatible with salicylic acid, among other things. But using it after lauryl sulfate gives problems because of the cations present. Therefore, the best solution is probably the use of a non-ionogenic emulsifier as methyl cellulose to replace Cetomacrogol.