My F10sc and xd for that matter the F919 was shipped with over a year and the F919 over two before the posted expiry. John Berry told me personally that he would use F10 range for up to one year after the posted date if necessary.

Yes 6 months diluted with tap water. Chlorhexidine is quite short once diluted. It also needs to be kept in air tight containers. For me this was the deciding factor. I actually really like the F10 range the SC, F919 and the XD are fabulous products I'd also highly recommend the f10 hand soap it is great.