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[–] stationJO 0 points 2 points (+2|-0) ago  (edited ago)

Water purification in case of a biological attack or contamination by say flooding that causes sewage to enter the drinking supply. Chlorine or filtration aren't going to cut it in some cases. At least from what I understood from a customer that made chlorine for water treatment. HCN on a first stage would get rid of anything biological then a TSP hydrogen solution to neutralize the HCN down to 90-95 clean then boiled off. Somehow as nasty as the stuff is it gets rid of whatever toxin so and so bioweapon would leave in the water that other methods couldn't do.

EDIT. The other scary thing would be a nation using a boat full of infected rodents into a port city. Cyanide would be the only sure way to fumigate something like that. And it's also a precursor for nylon so pretty much every branch of the military uses that material for equipment, so if you end up going to war you're going to need webbing, backpacks, slings, belts, straps, seat belts, rope, among other things.

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[–] NoRoyalty [S] 0 points 0 points (+0|-0) ago 

DoD would be the agency to buy hydrogen cyanide if it were in fact intended for use for the purposes you suggest. FEMA and DoD coordinate for planning purposes but FEMA is really in the business of providing for basic needs in disaster scenarios. From a budget point of view this chemical is a national defense item. Ordinarily.