The end of a satellite

Yesterday USA hit a spy satellite over the Pacific Ocean. They destroyed the satellite in space because they were worry about the toxic hydrazine fuel on board. The missile was lunched from the USS Lake Erie, a warship and the missile was from “Standard” family the same family as the missiles that US hit the Iranian transport aircraft with two of them during the Iran-Iraq ware. I don’t know what would happen to this toxic fuel after explosion and pretty sure that the US military doesn’t know neither. The only thing that they know is that if this satellite didn’t destroy it would kill people with 3% probability. Now it has been destroyed but no one knows if this toxic fuel will be absorbed by the atmosphere or it goes to space.