No need to freeze it in my opinion, just keep it in a dry cool place.I highly recommend just stocking up on as much test cyp as possible and storing in the deep freezer. I made 9 vials yesterday and the rest of 100 grams is in deep freezer I'm good for 2 years now. Then when I need another 2 I'll brew another 9 or 10. Basically how I see it. 1kg will last a very very long time for one person. Drop on it domestic or international. Leave the ugl scene till things clear up