If you got a 10ml vial there is no option. You have to use acetic acid (or make your own). If you have these small vials with 100mcg each I would prefer bacteriostatic water or NaCl( with the latter one as the best opt IMO, as it would not give you the well known stings).
For those of you who use acetic acid I recommend to use a little dose of bw or nacl, as it seems like acetic acid alone could damage your muscle.
-UC