Re: Potassium Ferricyanide. Safe when used with the most modest care.
So, just don't eat it; don't drink it; don't combine it with very strong acids; don't breathe it. Other than that, use according to the directions etc and it's fine.
I'm sure someone local to your area can use it. Your business if you do not want to ship it, but most of the chemical suppliers who specialize in bulk chemical supplies retail to photographers sell it and ship it. It is not one of the materials that shippers or DEA are wary of. Pretty tame material. Maybe someone local could get the PF from you and then ship to whoever?