up to 80 % w/w peg the solubility data conform to a log linear equation ln s = ln sw + f sigma where s is the e2 concentration in the water/cosolvent mixture , sw is e2 solubility in water , f is the weight fraction of peg 400 and sigma is a parameter representing the solubilizing power of the cosolvent for the drug .
C0032483
peg
C0032478
peg 400