Germs cannot live on clean dry surfaces for more than a few hours. So likely the razor will not be "dirty" (in a germ sense) when you unwrap it. So clean off surface dirt and then soak for a while (hour, maybe overnight) in either lysol, ammonia solution, or isopropyl alcohol. These are all common, cheap, and effective in killing most or all microorganisms. Then you can polish up.
Barbicide safety sheet is here http://www.king-research.com/pdf/msd...icide_MSDS.pdf Looks like a major ingredient is isopropyl alcohol. Also has "Barbicide's active ingredient is Alkyl dimethyl benzyl ammonium chloride (5.12% by volume). It also contains sodium nitrite, amongst other things. " (Wikipedia) The benzyl ammonium chloride ingredient is also found in lysol and bactine.
Bottom line? Common household chemicals will disinfect the few nasties just fine!