Well, you only need 1% BA for bacteriostatic purposes...........and polysorbate 80 should do the job. Not sure how much you will need to add..............I would just start adding drops until the hormone quits clumping up, and disperses evenly in the liquid.
Now the only problem is, unless you have an autoclave, you won't have a sterile suspension. You can't filter a suspension, and trying to bake a water based experiment in your oven probably won't be a great idea.
You can use it orally.