Description

Potassium Sodium Tartrate Tetrahydrate is a high-purity, crystalline salt widely recognized for its role as a key analytical reagent and food additive. This compound is essential for ensuring precise results in laboratory titrations and for stabilizing and emulsifying food products. It is a critical material for industries including pharmaceuticals, food & beverage, analytical chemistry, and electroplating.

Application

• Fehling's Solution Reagent: A primary component for the qualitative and quantitative detection of reducing sugars in analytical chemistry.
• Food Additive (E337): Used as an acidity regulator, sequestrant, and stabilizer in various food products like jellies and processed cheeses.
• Pharmaceutical Excipient: Employed as a buffering agent and stabilizer in certain medicinal formulations and effervescent tablets.
• Electroplating & Metal Finishing: Acts as a complexing agent in electroplating baths for improved metal deposition and surface finish.
• Laboratory Standard: Serves as a primary standard for standardizing solutions in volumetric analysis (argentometry).
• Mirror Silvering: A key component in traditional Tollens' reagent for the chemical deposition of silver mirrors on glass.

Basic Information

Product Name	Potassium Sodium Tartrate Tetrahydrate
CAS No.	6381-59-5
Molecular Formula	C4H4KNaO6 · 4H2O
Molecular Weight	282.22 g/mol
Synonyms	Rochelle Salt; Seignette Salt; Potassium Sodium L-(+)-Tartrate Tetrahydrate; E337; L-(+)-Tartaric Acid Potassium Sodium Salt Tetrahydrate; Sodium Potassium Tartrate Tetrahydrate; Fehling's Solution Salt; ACS Reagent Potassium Sodium Tartrate
EINECS	205-698-2

Quality Control

Our Potassium Sodium Tartrate Tetrahydrate is manufactured under strict quality management systems. We offer grades compliant with ACS Reagent, USP-NF, and FCC standards, ensuring suitability for analytical, pharmaceutical, and food applications. Each batch is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles, available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to prevent caking and degradation due to moisture absorption.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (Titration)	≥ 99.0%
pH (5% Solution)	6.5 - 8.5
Loss on Drying	21.0 - 26.0%
Insoluble Matter	≤ 0.005%
Chloride (Cl)	≤ 0.001%
Sulfate (SO4)	≤ 0.005%
Heavy Metals (as Pb)	≤ 0.001%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.