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Potassium sodium tartrate tetrahydrate is a white crystalline inorganic salt commonly used as a complexing agent, buffering agent, and in analytical chemistry. It is well-known as Rochelle salt and is widely utilized in laboratory and pharmaceutical applications.

🏭⚗️ Production
It is typically prepared by crystallizing a solution containing tartaric acid neutralized with potassium and sodium hydroxides, followed by purification and drying to obtain the tetrahydrate form.

🔬 Properties
The chemical formula is KNaC₄H₄O₆·4H₂O with a molar mass of approximately 282.23 g/mol. It appears as colorless or white crystals, highly soluble in water, and forms alkaline solutions. The compound is stable under normal storage but decomposes on strong heating.

🧪 Applications
Potassium sodium tartrate tetrahydrate is used in complexometric titrations as a chelating agent, in pharmaceutical formulations, and as a stabilizer in food and beverages. It also finds use in laboratory buffer preparations and as a laxative in medicine.

⚠️ Safety
This compound is generally safe but may cause mild irritation to skin and eyes upon contact. Inhalation of dust should be avoided to prevent respiratory irritation. Proper personal protective equipment such as gloves and goggles is recommended during handling. It should be stored in a cool, dry place away from incompatible substances.