Definition of Glauber's salt in US English:

Glauber's salt

(also Glauber's salts)


  • A crystalline hydrated form of sodium sulfate, used chiefly as a laxative.

    • ‘This includes various seaweeds such as kelp or dulse, certain mineral salts such as sodium sulfate (Glauber's salts) and certain plants.’
    • ‘Such systems are now used only for certain specialized applications such as the production of Glauber's salt for synthetic sponges, or for very small-scale operations, or in primitive areas where the cost of labor is extremely low.’
    • ‘Some are remembered by association with useful substances, like Fehling's solution, or Glauber's salt.’
    • ‘Epsom salt (magnesium sulfate heptahydrate MgSO 4 7H 2 O) and Glauber's salt (sodium sulfate decahydrate Na 2 SO 4 10H 2 O) are examples of hydrates.’
    • ‘Having experienced a mild diarrheal illness for several days, he had attempted to cure himself of this ailment that morning with a dose of Glauber's salts (sodium sulfate, similar to Epsom's salt), a laxative.’


Mid 18th century: named after Johann R. Glauber (1604–1668), the German chemist who first produced the substance artificially.


Glauber's salt

/ˈɡloubərz ˌsôlt/