Ammoniacum

Ammoniacum is a gum-resin exuded from the stem of a perennial herb (Dorema ammoniacum) of the umbel family (Apiaceae). Ammoniacum has a faintly fetid, unpleasant odor; externally it possesses a reddish-yellow appearance and a waxy luster.

Ammoniacum has magical properties: 2 drachms of it are a component of Belch Powder.

Appearances

 * Harry Potter films
 * Harry Potter Wizard's Collection