You need preservatives (BA) in the final solution for it remain sterile in a multiuse vial.Hey man sorry for the thread bump. Im about to make my own brew of l carnitine. I was under the impression that if you used back water you do not need to add 1-2% BA. Is that not correct?
If you use ready made bac water it already contains BA so you don't need to add it. Just make sure to filter after adding the powder because the powder is not sterile.
