i have background in organic chem, i have discused the issue of estrodiol seperation from test prop. technicly its imposible, but if you remove the esters from both estradiol and test prop, then you are left with a mixture of the two and they are both not soluble in water, then you can add a salt (Na ion) onto estradiol, and the addition of "Na" ion will make estradiol soluble in water while leaving test not soluble. after that all you do is mix both esradiol and test with water, run the mixter through a filter, estradiol will go through since its soluble in water, while test will not. and you have your pure testosterone waiting to be injected.