Tartar is a salt or ester of the organic compound tartaric acid, a dicarboxylic acid. Muggles have a number of uses for tartrates.[1]

Tartar has magical properties: half an ounce of it was used as a component in the making of Belch Powder.[2][3]


Notes and references

  1. "Tartrate" at Wikipedia
  2. Label Collection book in the Harry Potter Wizard's Collection box set.
  3. The label reads: "of Mummy, Mastick, Red Myrrhe, Olibanum, Ammoniacum, Oppopanax, Bdelium, each ʒii. Vitriol ℔ii. Honey, ℔ii. Tartar ℥1,ſs. Aquavitæ, gal.iii." which uses the apothecaries' system of weights.