I tried it once on a plasma fire and it didn't do anything, so I threw it away. (after doing the mission of course )
Edit: That was a pretty hilarious mission, though. I was doing it with a friend. At one point he says, "Your bridge officers are dumb, they're standing in fire." A little while later I go to leave, and he /coughs. I look in his direction, and all my bridge officers are in a pile, dead.