It atomizes Hidan.you can blow him to bits with it , that's all
It would most definitely kill him. There wouldn't be anything left for Hidan to get sewn back.Probably not kill since he is immortal and all, but beat him? Oh yeah definitely.
EDIT: Technically it should by all rights kill him but you know how Kishi logic goes. If even an atom is left he is probably still concidered alive.
No hidan is purely mortal. the only thing it will do is blow him to bitscand deidara mini bombs which he used against sasuke kill hidan