The term "mono Na salt of Sodium Selenite" refers to a specific compound with various synonyms. This compound, commonly known as sodium selenite monohydrate or sodium selenite Na2SeO3.H2O, can be used in different applications. It is a crystalline powder that contains sodium, selenium, and oxygen. Some other synonyms for this compound include monosodium selenite, sodium selenite hydrate, and monosodium selenate. These synonyms are often used interchangeably, depending on the context. The compound is primarily used in nutritional supplements, pharmaceuticals, and in some industrial processes. Its versatility and various synonyms make it an essential component in different fields.