the solution in there is crap , i think it last for 2 days only.
get some BAC water, inject 1cc into the HCG ampule to mix it & draw it in an empty vial, then draw 9cc of BAC into that vial .
now u have 500iu per 1cc, or u can inject 5 cc into the vial and have 1000iu/ml.. u do the math .