"Michi Henning" wrote in message
...

The solution lasts indefinitely, no refrigeration needed. Label the bottle
as
poison
though! I haven't tried, but I suspect KNO3 would taste awful, and I have
no
idea
what would happen if someone swallowed it -- it may well be toxic.
Left-over soda bottles with their labels still on are probably a bad
idea...

See http://www.chemsupply.com.au/MSDS/1CH5K.pdf


Graham.