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sodium sulfate anhydrous formula is the dry form of sodium sulfate, also known as Glauber’s salt, sal mirabilite and anhydrous sodium sulfate. It is a white, monoclinic crystal or powder that dissolves in water to form a neutral solution. It is a common raw material in the manufacture of gypsum and sodium silicate as well as other chemical products. It is also used as a drying agent for organic solutions and in textile finishing, papermaking, detergent production, dye testing and in the manufacture of calcium carbonate and sodium bicarbonate. It is a major component in the Kraft process for making wood pulp and is the principal ingredient in US powdered laundry detergents although this use is declining as more consumers move to liquid detergents.

It is moderately soluble in water and in most organic solvents. It is also soluble in the alkaline solutions of phosphates and sulfates. It forms double salts with many other metal sulfates such as NaAl(SO4)2 (unstable above 39 degC) and also with other alkali metals like NaCr(SO4)2. It is insoluble in organic acids.

In the environment it is rapidly absorbed and deposited in soils, with a mean solubility of 1.05 kg/ha. It is not expected to bioaccumulate or enter the human food chain. Upon ingestion it is excreted in the urine and stool. When administered as a therapeutic agent it is generally given in isosmotic solutions so that administration does not disturb normal electrolyte balance and does not lead to absorption or excretion of ions or water. It is a major component of the treatment for fluid and electrolyte imbalances in infants, children and some adults and may be used to treat dehydration due to diarrhea.