Description

(S)-(+)-Benzoin is the high-purity, single enantiomer form of benzoin, a versatile chiral building block and photoinitiator. This optically active compound is essential for applications requiring specific stereochemistry, offering superior selectivity and performance over its racemic counterpart. It is a critical intermediate for pharmaceutical synthesis, asymmetric catalysis, and advanced material science research, serving industries where chiral purity directly impacts product efficacy and quality.

Application

• Pharmaceutical Intermediate: A key chiral synthon for the synthesis of enantiomerically pure drugs and active pharmaceutical ingredients (APIs).
• Asymmetric Catalysis: Used as a chiral ligand or auxiliary in stereoselective chemical reactions to produce single-enantiomer compounds.
• Photoinitiator: Functions as a Type II photoinitiator in UV-curable coatings, inks, and adhesives, particularly where specific properties are needed.
• Organic Synthesis: Serves as a fundamental building block for constructing complex organic molecules in research and development.
• Flavor and Fragrance Industry: Employed in the synthesis of specific chiral aroma chemicals.
• Analytical Chemistry: Utilized as a standard or reagent in chiral separation and analysis methods.

Basic Information

Product Name	(S)-(+)-Benzoin
CAS No.	5928-67-6
Molecular Formula	C14H12O2
Molecular Weight	212.24 g/mol
Synonyms	(S)-(+)-2-Hydroxy-1,2-diphenylethanone; (S)-Benzoin; (+)-Benzoin; S-Benzoin; L-Benzoin; (S)-2-Hydroxy-2-phenylacetophenone; (S)-α-Hydroxybenzyl phenyl ketone; Benzoin, (S)-(+)-
EINECS	227-668-1

Quality Control

Our (S)-(+)-Benzoin is manufactured under a strict quality management system. Each batch is analyzed to ensure high chemical and optical purity, with specifications typically covering identity, assay, enantiomeric excess (e.e.), and impurity profiles. Certificates of Analysis (COA) documenting results from techniques like HPLC, chiral chromatography, and NMR are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (typically 15-25°C). Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Enantiomeric Excess (Chiral HPLC)	≥ 99.0% e.e.
Melting Point	132 - 136 °C
Specific Rotation [α]20/D	+115° to +120° (c=2 in ethanol)
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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