Mixing and storage

The powder is mixed with bacteriostatic water, which lets one vial be entered repeatedly, kept in the fridge at 2 to 8 degrees once mixed and used within about 28 days, with unmixed powder stored cool, dark and dry. The more useful handling point is about the vial itself: chemical analysis of products sold loosely online has found contents that did not match the claim, so where the powder came from decides what you are actually holding. A clear solution and a named chain of supply are the minimum, and the rest of the handling belongs to the clinician giving it.