If you're trying to prepare for total social breakdown then acquiring this substance is one of the lowest cost and most important things you can do.
I can't emphasize enough that you don't want to rely on boiling water (even though boiling water does a great job, the logistics involved in boiling water are going to be significantly more than you might imagine).
Anyone interested in this topic should also do some Googling on '+bleach +"white vinegar"'. The combination of these two results in an antiseptic that, apparently, can sanitize even against MRSA(!) Pretty amazing combo!
Duke, are you sure of the safety of combining bleach and vinegar? I’ve been told that the mixture gives off poisonous fumes.