Thanks for reply !!
as I said before, I've a pH 4,5 solution with Peg-40 hydrogenated castor oil. Sometime this solution becomes cloudy and sometime starts to flocculate. and this is irreversible!!!!
I try to investigate about this.
I think about hydroxystearic acid, because it is insoluble in water.
so, is Peg-40 hydrogenated castor oil a mixture with potential free hydroxystearic acid?
is the hydrolysis of Peg-40 hydrogenated castor oil possible in a solution with pH 4,5 and at room temperature?
lots of thanks!!!