both hand held and launch type, how do you dispose of them?
If your talking about flares, try your local fire dept.
or look for the manufacturer's msds (material safety data sheets). the information could be on there.
Here in Jersey it is illegal to train with a live burn. We get hundreds of people looking to drop off thier expired flares at the FH. We will accept Them as a courtesy, however, We do not use Them. We take Them to the landfill on "amnesty day" which is a couple of times a year when They accept such items, batteries, paint, tires ect.
I thought the Coast Gaurd took them as well.
get far enough offshore, make a radio call and inform everyone you are testing expired signaling devices. we shoot shit off when ever it passes expiration date