Description

Potassium Sodium Tartrate Tetrahydrate is a high-purity, crystalline salt widely recognized for its role as a key analytical reagent and food additive. Its primary value lies in its unique chelating and buffering properties, which are essential for precise chemical analysis and product stabilization. This compound is a critical raw material for industries including pharmaceuticals, food & beverage, and analytical chemistry, where consistent quality and reliable supply are paramount.

Application

• Fehling's Solution Reagent: A fundamental component for the qualitative and quantitative analysis of reducing sugars in analytical chemistry and food testing.
• Pharmaceutical Excipient: Used as a buffering agent, stabilizer, or chelating agent in various drug formulations and injectable solutions.
• Food Additive (E337): Functions as an emulsifier, sequestrant, and pH regulator in processed foods, cheeses, and gelatin desserts.
• Electroplating & Metal Finishing: Serves as a complexing agent in electroplating baths to improve the quality and uniformity of metal deposits.
• Laboratory Standard: Employed as a primary standard for standardizing volumetric solutions and calibrating equipment.
• Baking Powder Component: Acts as a leavening acid in some baking powder formulations to control gas release.

Basic Information

Product Name	Potassium Sodium Tartrate Tetrahydrate
CAS No.	6100-16-9
Molecular Formula	C4H4KNaO6 • 4H2O
Molecular Weight	282.22 g/mol
Synonyms	Rochelle Salt; Seignette Salt; Sodium Potassium Tartrate Tetrahydrate; E337; L(+)-Potassium Sodium Tartrate Tetrahydrate; Potassium Sodium L-(+)-Tartrate Tetrahydrate; 2,3-Dihydroxybutanedioic acid, monopotassium monosodium salt, tetrahydrate
EINECS	212-769-1

Quality Control

Our Potassium Sodium Tartrate Tetrahydrate is manufactured under a strict quality management system. We offer grades compliant with key pharmacopeial standards such as USP-NF, BP, and EP, as well as food-grade material meeting FCC specifications. Every batch undergoes rigorous analytical testing to ensure identity, purity, and conformance to specifications. A comprehensive Certificate of Analysis (COA) is provided with each shipment.

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); the original container must be kept tightly sealed to prevent absorption of atmospheric moisture and caking.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (on dried basis)	99.0% - 101.0%
pH (5% solution)	6.5 - 8.5
Loss on Drying	21.0% - 26.0%
Chloride (Cl)	≤ 0.005%
Sulfate (SO4)	≤ 0.01%
Heavy Metals (as Pb)	≤ 10 ppm
Specific Rotation [α]D20	+28.0° to +30.0°

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