Description

(-)-Dibenzyl D-Tartrate CAS NO 4136-22-5 is a high-purity chiral auxiliary and resolving agent derived from D-tartaric acid. This compound is critically important for its role in asymmetric synthesis, enabling the production of enantiomerically pure intermediates for pharmaceuticals and fine chemicals. It is primarily needed by research institutions and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries for chiral resolution and as a building block in complex organic synthesis.

Application

• Chiral Resolution Agent: Used for the separation of racemic mixtures of amines, amino acids, and other chiral compounds.
• Asymmetric Synthesis: Serves as a key chiral auxiliary or ligand in catalytic asymmetric reactions, including dihydroxylation and epoxidation.
• Pharmaceutical Intermediate: A crucial building block in the synthesis of enantiomerically pure active pharmaceutical ingredients (APIs).
• Catalyst Preparation: Employed in the synthesis of chiral catalysts and ligands for homogeneous catalysis.
• Fine Chemical Synthesis: Used in the production of specialty chemicals, flavors, and fragrances requiring high optical purity.
• Academic & Industrial Research: A valuable tool in methodological development and process chemistry within R&D laboratories.

Basic Information

Product Name	(-)-Dibenzyl D-Tartrate
CAS No.	4136-22-5
Molecular Formula	C18H18O6
Molecular Weight	330.33 g/mol
Synonyms	D-(-)-Dibenzyl Tartrate; Dibenzyl D-(-)-Tartrate; (2R,3R)-1,4-Dibenzyl 2,3-dihydroxysuccinate; Dibenzyl (2R,3R)-Tartrate; D-Dibenzyl Tartrate; (-)-Dibenzyl L-Tartrate (common misnomer for D-form); Dibenzyl (R,R)-Tartrate; Benzyl D-tartrate diester
EINECS	223-945-5

Quality Control

Our (-)-Dibenzyl D-Tartrate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for research and synthesis applications. A comprehensive Certificate of Analysis (COA) detailing purity, optical rotation, and identity is provided with every shipment to guarantee consistent quality and traceability.

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 moisture-sensitive; keep the container tightly sealed when not in use.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Optical Rotation [α]20/D	-15.0° to -17.0° (c=1 in ethanol)
Melting Point	95°C - 100°C
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%
Water Content (KF)	≤ 0.5%

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