Natrum sulphuricum, also known as sodium sulfate or Glauber's salt, is a chemical compound with the formula Na2SO4. It is a white, crystalline substance that is highly soluble in water and is commonly used in various industrial, medical, and domestic applications. In homeopathy, Natrum sulphuricum is used as a remedy for a range of ailments, including respiratory issues, digestive problems, and skin conditions. The name "Natrum sulphuricum" is derived from Latin, where "natrum" refers to sodium and "sulphuricum" refers to sulfur. In Hebrew, it is known as נתרום סולפוריקום. In German, it is called Natrium sulfuricum, and in French, it is referred to as Natrum sulfuricum. The compound is naturally occurring and can be found in mineral springs and lake deposits. It is also synthetically produced for commercial use. Natrum sulphuricum is notable for its hygroscopic properties, meaning it readily absorbs moisture from the air.