Description

Disodium Tartrate Dihydrate is the disodium salt of L-(+)-tartaric acid, commonly supplied as a white crystalline powder. This compound serves as a versatile buffering agent, chelator, and emulsifying salt, valued for its stability and compatibility in complex formulations. It is essential for manufacturers in the food & beverage, pharmaceutical, and industrial sectors requiring precise pH control and metal ion sequestration.

Application

• Food & Beverage Industry: Used as an acidity regulator, emulsifier, and sequestrant in processed foods, baking powders, and beverages.
• Pharmaceutical Manufacturing: Acts as a buffering agent and stabilizer in tablet and capsule formulations, and as a chiral resolving agent.
• Industrial Chemistry: Serves as a component in electroplating baths, metal cleaning solutions, and as a catalyst or intermediate in organic synthesis.
• Laboratory & Analytical Reagents: Employed as a standard or buffer component in various analytical and biochemical procedures.
• Cosmetics & Personal Care: Functions as a pH adjuster and chelating agent in creams, lotions, and other cosmetic products.

Basic Information

Product Name	Disodium Tartrate Dihydrate
CAS No.	6106-24-7
Molecular Formula	C4H4Na2O6 · 2H2O
Molecular Weight	230.08 g/mol
Synonyms	Sodium Tartrate Dihydrate; L-(+)-Disodium Tartrate Dihydrate; Disodium L-Tartrate Dihydrate; Disodium (2R,3R)-2,3-Dihydroxybutanedioate Dihydrate; Rochelle Salt; Seignette Salt; E335
EINECS	205-695-6

Quality Control

Our Disodium Tartrate Dihydrate is produced under a strict quality management system. We offer grades suitable for food (FCC), pharmaceutical (USP/EP), and technical applications, with each batch undergoing rigorous analytical testing. A comprehensive Certificate of Analysis (COA) documenting purity, identity, and specific impurities is available for every shipment to ensure traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (on dried basis)	98.0 - 102.0 %
pH (5% solution)	7.0 - 9.0
Loss on Drying	14.0 - 17.0 %
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Specific Rotation [α]20/D	+26.0° to +30.0°

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