Rochelle’s Salt

• CAT Number: R062198
• CAS Number: 6381-59-5
• Molecular Formula: C₄H₄KNaO₆•4[H₂O]
• Molecular Weight: 210.16
• Purity: ≥95%
• Synonyms: (2R,3R)-2,3-Dihydroxybutanedioic Acid Monopotassium Monosodium Salt Tetrahydrate; 2,3-Dihydroxy-[R-(R*,R*)]butanedioic Acid Monopotassium Monosodium Salt Tetrahydrate; L-(+)-Tartaric Acid Monopotassium Monosodium Salt, Tetrahydrate; Monopotassium Mon
• Storage: Store at -20°C
• IUPAC Name: potassium;sodium;(2R,3R)-2,3-dihydroxybutanedioate;tetrahydrate
• InChI: InChI=1S/C4H6O6.K.Na.4H2O/c5-1(3(7)8)2(6)4(9)10;;;;;;/h1-2,5-6H,(H,7,8)(H,9,10);;;4*1H2/q;2*+1;;;;/p-2/t1-,2-;;;;;;/m1....../s1
• InChIKey: VZOPRCCTKLAGPN-ZFJVMAEJSA-L
• SMILES: [C@@H]([C@H](C(=O)[O-])O)(C(=O)[O-])O.O.O.O.O.[Na+].[K+]

Rochelle’s Salt（Cat No.:R062198）, also known as Potassium Sodium Tartrate Tetrahydrate, is a double salt of tartaric acid widely used in analytical chemistry, pharmaceuticals, and electronics. It serves as a complexing agent in Fehling’s and Benedict’s reagents for detecting reducing sugars. In the pharmaceutical industry, it functions as a mild laxative and stabilizer. Rochelle’s Salt is also notable for its piezoelectric properties, historically used in microphones and crystal phonograph cartridges. Supplied at high purity, it is ideal for applications in chemical analysis, educational labs, and specialty materials research.