Description

D(-)-Tartaric Acid is the levo-rotatory enantiomer of tartaric acid, a naturally occurring dicarboxylic acid. This specific isomer is highly valued for its precise chiral properties, which are critical for applications requiring defined stereochemistry. It serves as a key chiral building block and resolving agent in the pharmaceutical, food, and fine chemical industries, where optical purity is paramount for product efficacy and regulatory compliance.

Application

• Pharmaceutical Synthesis: As a chiral resolving agent for separating racemic mixtures of amines and other basic compounds, and as a precursor for chiral catalysts and intermediates.
• Food & Beverage Industry: Used as an acidulant (E334) in wines, candies, and jellies, where it contributes a sharp, tart taste and acts as an antioxidant synergist.
• Cosmetics & Personal Care: Functions as a pH adjuster and chelating agent in creams, lotions, and other formulations.
• Chemical Synthesis: Employed in asymmetric synthesis and as a starting material for producing tartrate salts, esters, and other derivatives.
• Analytical Chemistry: Used in chiral chromatography as a component of mobile phase additives or chiral stationary phases.
• Electroplating & Metal Finishing: Acts as a complexing agent in electroplating baths for improved metal deposition and surface finish.

Basic Information

Product Name	D(-)-Tartaric Acid
CAS No.	526-83-0
Molecular Formula	C4H6O6
Molecular Weight	150.09 g/mol
Synonyms	(-)-Tartaric Acid; L-(+)-Tartaric Acid (Note: This is the enantiomer; D(-) is often confused); Levotartaric Acid; Natural Tartaric Acid; (2R,3R)-2,3-Dihydroxybutanedioic Acid; E334; Threaric Acid; 2,3-Dihydroxysuccinic Acid
EINECS	208-378-7

Quality Control

Our D(-)-Tartaric Acid is manufactured under a strict quality management system. It can be supplied to meet various standards including Food Chemical Codex (FCC), USP/NF, and Reagent Grade specifications. Every batch undergoes rigorous analytical testing to ensure compliance with identity, purity, and optical rotation requirements. 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, well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can lead to caking or changes in physical properties.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (Titration)	≥ 99.5%
Specific Optical Rotation [α]20/D	-12.0° to -13.0° (c=20 in H2O)
Loss on Drying	≤ 0.5%
Sulfated Ash	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Residue on Ignition	≤ 0.1%

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