Description

D-(-)-Tartaric Acid CAS NO 147-71-7 is the naturally occurring enantiomer of tartaric acid, a versatile chiral building block and acidulant. This high-purity optical isomer is critical for applications requiring specific stereochemistry, offering superior enantiomeric purity and consistent performance. It is an essential raw material for the pharmaceutical, food and beverage, and fine chemical synthesis industries, where its chiral nature and acidic properties are leveraged.

Application

• Pharmaceutical Chiral Resolution & Synthesis: As a resolving agent for racemic mixtures and a chiral precursor in asymmetric synthesis for active pharmaceutical ingredients (APIs).
• Food & Beverage Additive (E334): Used as a natural acidulant, flavor enhancer, and antioxidant stabilizer in wines, candies, and baked goods.
• Chemical Synthesis & Catalysis: Employed in the preparation of chiral ligands, catalysts, and as a starting material for various esters and salts in fine chemistry.
• Cosmetics & Personal Care: Functions as a pH adjuster and antioxidant in skincare formulations and effervescent products.
• Electroplating & Metal Surface Treatment: Acts as a complexing agent in electroplating baths and for metal cleaning and polishing.
• Laboratory & Analytical Reagent: Serves as a standard in analytical chemistry and biochemical research.

Basic Information

Product Name	D-(-)-Tartaric Acid
CAS No.	147-71-7
Molecular Formula	C4H6O6
Molecular Weight	150.09 g/mol
Synonyms	D-Tartaric Acid; (2R,3R)-2,3-Dihydroxybutanedioic Acid; Natural Tartaric Acid; L-(+)-Tartaric Acid Enantiomer; (-)-Tartaric Acid; E334; Threaric Acid; Winestone
EINECS	205-695-6

Quality Control

Our D-(-)-Tartaric Acid is manufactured under a strict quality management system. It can be produced to meet various pharmacopeial standards such as USP, EP, JP, and food-grade specifications like FCC. Every batch undergoes rigorous analytical testing including assay, optical rotation, specific rotation, and impurity profile analysis to ensure high enantiomeric purity and chemical consistency. Certificates of Analysis (COA) are provided and traceability is maintained for full quality assurance.

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). 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 degradation.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (Titration)	≥ 99.5%
Specific 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%
Optical Purity (HPLC)	≥ 99.0%

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