FWIW, this is what Health Canada (or rather the North Bay Perry Sound District) have to say about Barbicide.

http://www.nbdhu.on.ca/en/Personal%2.../barbicide.htm

According to their information, it is only safe to use it on a razor if that razor cannot cut the skin.

Personally, I'm not too worried about these things. Remember that these guidelines are for professionals who use the same instruments on many different people. Your personal razor is not like that at all. There's no point in becoming paranoid.
Even with ebay razors, I think if you clean the scales and around the pivot with water & soap, rub it with alcohol and then boil the blade in some water, everything should be fine. In fact, most ebay blades need to be cleaned up, so a bath in boiling water + baking soda is recommended anyway.

BTW, I wonder what happens to those Mach 3 blades in the factory. If a worker sneezes over them, do they throw away that batch? I don't think so. Yet, I've never heard of anybody disinfecting their Mach 3 upon purchase. Sometimes, it's better not to think about these things, at least it keeps you sane.

Redwoood