Question
Posted on: April 8 2014Is eucerine going to break aqua with addition tween?
I have received the following formula from the dermatologist:
Triamcinolone acetonide 0.1%
Chloramphenicol 2%
Tween 80 2.5%
Tween 20 2.5%
Eucerine Aqua AD 100%
Now it seems to me illogical to add O/W emulsifiers to a W/O cream and I think the cream will go down.
Or does the tween have a certain function in this formula
Answer
I can hardly predict the emulsion type of your finished product. Nevertheless I'm guessing on O/W.
The question is "what does the Doctor want?"
He wants an O/W and you do not get a nice result increase the amounts of the Tween to eg 3%
If he wants a W/O then both tweens should be removed from the composition.