Clearing out the mess left behind by others in a garage, I have found a small cylinder which says it has R-404a Refrigerant in it. It has something, for sure.
I could: Let it out into the atmosphere (may not be good for the environment), and put the cyclinder in the recylce bin; See if a local refrigeration company wants it, if I can find one; Offer it on Freecycle; Call the Bomb Squad. Any other ideas? I doubt that the council would be interested.
Any legal worries?