Description

(R)-α-Methylbenzenemethanesulfonic Acid is a high-purity chiral sulfonic acid derivative, serving as a critical building block in asymmetric synthesis. Its value lies in its role as a versatile resolving agent and chiral auxiliary for the production of enantiomerically pure pharmaceutical intermediates. This compound is essential for R&D chemists and process development scientists in the pharmaceutical, agrochemical, and fine chemical industries who require precise stereochemical control.

Application

• As a chiral resolving agent for the separation of racemic mixtures of amines and other basic compounds.
• Key chiral intermediate in the synthesis of active pharmaceutical ingredients (APIs) requiring the (R)-configuration.
• Utilized in asymmetric catalysis and as a precursor for novel chiral ligands and organocatalysts.
• Employed in agrochemical research for the development of enantiomerically pure herbicides and pesticides.
• Used in academic and industrial R&D for methodological studies in stereoselective synthesis.
• Acts as a derivatization agent in analytical chemistry for chiral separation and purity determination via HPLC.

Basic Information

Product Name	(R)-α-Methylbenzenemethanesulfonic Acid
CAS No.	86963-40-8
Molecular Formula	C9H12O3S
Molecular Weight	200.25 g/mol
Synonyms	(R)-α-Methylbenzenemethanesulfonic Acid; (R)-α-Methylbenzylsulfonic Acid; (R)-1-Phenylethanesulfonic Acid; (R)-(-)-1-Phenylethanesulfonic Acid; (R)-Styrenesulfonic Acid derivative; (R)-Phenethylsulfonic Acid; (R)-Methylphenylmethanesulfonic Acid; (R)-PEsA
EINECS	Contact for details

Quality Control

Our (R)-α-Methylbenzenemethanesulfonic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including chiral purity (enantiomeric excess) and chemical purity determination, to ensure it meets the stringent requirements for advanced synthetic applications. Certificates of Analysis (COA) with detailed chromatographic data are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions to maintain stability and purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Enantiomeric Purity (Chiral HPLC)	≥ 99.0% ee
Water Content (KF)	≤ 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.