Popularly known as Glauber's Salt.

Properties : Sodium sulphate occurs as large, colorless prisms or granular crystals, odorless and having a bitter saline taste. It is freely soluble in water (1 :3) and practically insoluble in alcohol.

Action and Uses: Sodium sulphate has long been used as a saline cathartic, but is less popular than magnesium sulphate or sodium phosphate.

Dosage: 16 gm. or 240 grains.