Potassium sodium tartrate is commonly known as Rochelle salt, is a water-soluble double salt of tartaric acid containing both potassium and sodium ions. Its tetrahydrate form has the chemical formula KNaC₄H₄O₆·4H₂O and occurs as a crystalline solid. The compound can form stable complexes with metal ions and is recognized for its pronounced piezoelectric and ferroelectric properties. In laboratory chemistry, potassium sodium tartrate is valuable for its complexing behavior and compatibility with aqueous systems. It helps maintain cupric ions in solution under alkaline conditions, a property important in analytical reagents. Its major research applications include protein crystallization and reducing-sugar analysis, including its use in Fehling’s and 3,5-dinitrosalicylic acid reagent systems.
CAS No.: 6381-59-5
Synonyms: Rochelle salt, tartaric acid potassium sodium salt, seignette Salt tetrahydrate.
| Physical Properties | |
| Chemical formula | C4H4KNaO6 |
| IUPAC Name | potassium;sodium;(2R,3R)-2,3-dihydroxybutanedioate |
| Molecular weight | 210.16 g/mol |
| Solubility | Soluble in water |
| Density | 1.79 g/cm3 |
| Appearance | Colorless Crystalline Powder |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | Colorless |
| Physical State | Solid |
| Melting Point | 70-80 °C |
| Boiling Point | 200 °C |
| Ph Value | 7.0-8.5 Â Â |
| Odor | Odorless |
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| Pictograms : | No Information Available |
| Hazard Statements : | No Information Available |
| Precautionary Statements: | No Information Available |
Potassium sodium tartrate is commonly known as Rochelle salt, is a water-soluble double salt of tartaric acid containing both potassium and sodium ions. Its tetrahydrate form has the chemical formula KNaC₄H₄O₆·4H₂O and occurs as a crystalline solid. The compound can form stable complexes with metal ions and is recognized for its pronounced piezoelectric and ferroelectric properties. In laboratory chemistry, potassium sodium tartrate is valuable for its complexing behavior and compatibility with aqueous systems. It helps maintain cupric ions in solution under alkaline conditions, a property important in analytical reagents. Its major research applications include protein crystallization and reducing-sugar analysis, including its use in Fehling’s and 3,5-dinitrosalicylic acid reagent systems.
CAS No.: 6381-59-5
Synonyms: Rochelle salt, tartaric acid potassium sodium salt, seignette Salt tetrahydrate.
| Physical Properties | |
| Chemical formula | C4H4KNaO6 |
| IUPAC Name | potassium;sodium;(2R,3R)-2,3-dihydroxybutanedioate |
| Molecular weight | 210.16 g/mol |
| Solubility | Soluble in water |
| Density | 1.79 g/cm3 |
| Appearance | Colorless Crystalline Powder |
| Storage | Store at room temperature |
| Chemical Properties | |
| Color | Colorless |
| Physical State | Solid |
| Melting Point | 70-80 °C |
| Boiling Point | 200 °C |
| Ph Value | 7.0-8.5 Â Â |
| Odor | Odorless |
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| Pictograms : | No Information Available |
| Hazard Statements : | No Information Available |
| Precautionary Statements: | No Information Available |
Potassium sodium tartrate is used as an acidity regulator and stabilizer in food products and mild laxative in medicinal applications. In laboratories, it is an important reagent in Fehling’s solution and Biuret tests. It has also been used in piezoelectric devices and electronics because of its characteristic crystal properties.
Potassium sodium tartrate is commonly known as Rochelle salt. It is also referred to as sodium potassium tartrate. The tetrahydrate has the chemical formula KNaC₄H₄O₆·4H₂O.
Potassium sodium tartrate helps keep copper(II) ions dissolved in the alkaline solution used for the Biuret test. This supports reliable color development during the determination of protein concentration.Â
