Rochelle powder, also known as potassium sodium tartrate, has a variety of synonyms that are commonly used in different contexts. Some common synonyms for rochelle powder include Seignette salt, Rochelle salt, and sodium potassium tartrate. These names are interchangeably used based on their individual applications. For example, Seignette salt is commonly used in the manufacturing of silvering mirrors, while Rochelle salt is often used in the baking industry. Sodium Potassium tartrate is also used for medicinal purposes as a mild laxative and as a reagent in analytical chemistry. No matter what it is called, rochelle powder is a versatile and essential ingredient with a wide range of applications.