glauber salt manufacturer A 10 water B purity:99% C Food and Industry Grade Glauber Salt Manufacturer What is glauber salt? Sodium sulfate is the sodium salt of sulfuric acid. When anhydrous, it is a white crystalline solid of formula Na2SO4 known as the mineral thenardite; the decahydrate Na2SO4ยท10H2O has been known as Glauber's salt or, historically, sal mirabilis since the 17th century. ...