Potassium Sodium Tartrate

Chemical Formula: KNaC₄H₄O₆·4H₂O
Potassium Sodium Tartrate, also known as Rochelle salt, is a double salt of tartaric acid with potassium and sodium. This crystalline compound is known for its mild alkalinity, high solubility in water, and piezoelectric properties. It is widely used in laboratories, electroplating, pharmaceuticals, and food processing.
Appearance:
Colorless to white crystalline solid
Uses:
Pharmaceutical Applications:
Historically used as a mild laxative and a stabilizer in  pharmaceutical formulations. Its role has shifted to more supportive functions in lab-scale drug development.
Food & Beverage Industry:
Functions as an acidity regulator and emulsifier in food manufacturing. Recognized as a food-grade additive for specific niche applications under regulated usage.
Laboratory & Analytical Applications:
Used as a complexing agent in Fehling’s and Benedict’s solutions for the qualitative detection of reducing sugars. Also serves as a reagent in buffer systems.
Industrial Applications:
Applied in electroplating solutions to improve metal adhesion and uniformity. Also used in fluxes for soldering and as a sequestering agent in cleaning products.
Other Applications:
Utilized in piezoelectric devices and crystal growing due to its unique physical and electrical properties.