Did you know that BA is also used as a preservative (2-3% solution) to make most all injectable anabolic steroids? A 10ml vial of testosterone cypionate will have 0.3ml of BA in it total. The amount of BA I use to dissolve 10mg of test base (2-3 drops) is FAR less that what you would get injecting 150mg of test cypionate. You absolutely can't make a topical solution with crystals still in it. They will not ever absorb into blood stream.
Also, I am unaware of ANY transdermal made using testosterone esters. My understanding is the base drug must be used. In order to get the drug to penetrate the skin the ester must be removed due to the molecular weight.
Boldenone Base - 286.41 Da
Clostebol Base - 322.870 Da
Drostanolone Base - 304.4669 Da
Methenolone Base - 302.4510 Da
Nandrolone Base - 274.4022 Da
Stenbolone Base - 32.458 Da
Testosterone Base - 288.42Da
Trenbolone Base - 270.3706 Da
Since the relatively large molecular weight of transdermal drugs is restricted by the barrier function of the epidermis that disables to pass through the drug, the commercial transdermal drug distributed typically the smaller molecular weights than 500 Da. Since a transdermal drug flux has an inverse proportion with its molecular size of the drug, an ideal molecular size of drug would be less than 400 for TDD (Marwah et al., 2016).