Purity: Camphorating the Corpse (Hunut)
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 573:
After ghusl has been given to a corpse, it is obligatory to camphorate it – i.e. to apply camphor on its forehead, palms, knees, and the tips of the big toes – such that a little of the camphor remains on them even if by means other than rubbing. It is recommended that camphor also be applied to the tip of the nose of the corpse. The camphor must be powdered, fresh, and mubāḥ (not usurped); and if it has lost its fragrance on account of it being old, it is not sufficient.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)