"A chalky white pellet with the letters "HH" inscribed in tiny script."
The Desalination pellet is a rare item used to remove salt from liquids. When used, this pellet will convert up to 64 drams of salt water into fresh water, and up to 64 drams of slime into gel. It can be found rarely in the caves beneath Qud as a "tiny trinket", or occasionally purchased from a general goods dealer (tam the dromad merchant, etc.)
Because of its rarity, it is best saved in case gel is needed, rather than used for water.
It can be used to remove salt from other liquids, as well; such mixtures usually appear after pouring the liquid on the ground.