Description

Benzeneacetic Acid, 4-Bromo-α-Methyl-, (αr)- is a high-purity chiral intermediate of significant importance in advanced organic synthesis. This compound, identified by CAS NO 156142-98-2, is valued for its role in constructing complex molecular architectures with defined stereochemistry. It is primarily sought after by research institutions and pharmaceutical companies engaged in the development of novel active pharmaceutical ingredients (APIs) and fine chemicals.

Application

• Pharmaceutical Intermediate: A key chiral building block in the synthesis of potential drug candidates, particularly for central nervous system (CNS) and anti-inflammatory targets.
• Agrochemical Research: Used in the development of advanced, stereospecific pesticides and herbicides.
• Ligand Synthesis: Serves as a precursor for chiral ligands used in asymmetric catalysis.
• Academic & R&D: Employed in university and corporate research laboratories for methodological studies in stereoselective synthesis.
• Fine Chemical Production: Integral to the multi-step synthesis of specialty chemicals requiring high enantiomeric purity.

Basic Information

Product Name	Benzeneacetic Acid, 4-Bromo-α-Methyl-, (αr)-
CAS No.	156142-98-2
Molecular Formula	C9H9BrO2
Molecular Weight	229.07 g/mol
Synonyms	(R)-2-(4-Bromophenyl)propanoic acid; (R)-4-Bromo-α-methylbenzeneacetic acid; (R)-2-(4-Bromophenyl)propionic acid; (R)-4-Bromohydratropic acid; (R)-p-Bromohydratropic acid; (R)-2-(4-Bromophenyl)-2-methylacetic acid; (R)-α-Methyl-4-bromobenzeneacetic acid; (R)-4-Bromo-α-methylphenylacetic acid
EINECS	Contact for details

Quality Control

Our production of Benzeneacetic Acid, 4-Bromo-α-Methyl-, (αr)- adheres to stringent quality management protocols to ensure batch-to-batch consistency and high enantiomeric purity. All materials are characterized by advanced analytical techniques including chiral HPLC, NMR, and IR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing identity, purity, chiral excess, and impurity profile is provided with each shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 15-25°C). The product may be 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
Purity (HPLC)	≥ 98.0%
Chiral Purity (Chiral HPLC)	≥ 99.0% e.e.
Melting Point	Contact for details
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.