Just because the news media mentioned that several tons of NaCN were bought by N. Korea, doesn't necessarily imply that they are going to be
using it a destructive fashion. Heck, even water is a potentially lethal chemical (in excess).
Exactly. Just like when Iraq purchased 10 tonnes of Aerosil powder. Aerosil is used in chemical weapons so it can penetrate clothing.
Aerosil is also used in the production of .. PLASTIC compounds and polymers.
Again, there are hundreds of chemicals that have legitment uses that can also be used in chem warfare.
but for sake of argument, since NaCN is a controlled substance, and N.Korea wanted it for non-lethal reasons, it would only have to follow the
needed protocals. But to buy it on the black market instead raises all kinds of eyebrows.