Sodium thiosulfate, which is identified by its molecular structure of Na2S2O3, is an inorganic compound available as a pentahydrate. When it is in its solid form, it is efflorescent, which means that it loses water readily. It is a crystalline substance that dissolves easily in water, and it is also commonly known as a sodium hyposulfite. It is used in a variety of industries and applications. It is a significant component used in hand warmers and other types of chemical heating pads that are designed to produce heat through exothermic crystallization. In bacteriological assessments of water, it is used to promote the survival of coliform organisms by effectively neutralizing residual chlorine. Sodium thiosulfate is commonly used in a variety of medical applications as well. This compound is frequently featured in pharmaceutical preparations in order to provide patients with an anionic surfactant that can be used to aid in dispersion.