On 14/07/14 12:24, Tim Watts wrote:
Sodium Chlorate.

Hard because it was banned a couple of years back. Though some people
may still have a pot kicking about *cough*

http://www.amazon.co.uk/Industrial-S...dp/B00JR3NBMA/

seems to be above board and pukka

--
Everything you read in newspapers is absolutely true, except for the
rare story of which you happen to have first-hand knowledge. €“ Erwin Knoll