English: Caustic soda; Lye.
Natrium causticum is an alkali, sometimes called caustic soda. Its homoeopathic properties are unknown so far. I will not distinguish between the oxide and the alkali for the purpose of the overall picture, as they are closely related to each other: Na2O + H20 -> 2NaOH.
SignatureNatrium causticum is used to unblock drains. It is also used to clean wounds and to remove bacteria and fungi from glass.