Description

4-Bromobenzenesulfonic Acid Methyl Ester is a versatile organosulfur compound primarily used as a key synthetic intermediate in advanced organic synthesis. Its value lies in the reactive bromine and sulfonate ester functional groups, which enable selective coupling and functionalization reactions critical for building complex molecular architectures. This high-purity intermediate is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries developing active ingredients and novel materials.

Application

• Pharmaceutical Intermediate: Serves as a crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for molecules requiring a bromoarene or sulfonate ester moiety.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and insecticides where the bromophenyl group is incorporated into the final active compound.
• Ligand and Catalyst Preparation: Acts as a precursor for synthesizing specialized ligands and organometallic catalysts used in cross-coupling reactions like Suzuki-Miyaura and Buchwald-Hartwig amination.
• Polymer and Material Science: Employed in the creation of monomers and functionalized polymers, including sulfonated polymers for ion-exchange membranes or specialty coatings.
• Dye and Pigment Manufacturing: Functions as an intermediate in the synthesis of complex organic dyes and colorants.
• Chemical Research & Development: A valuable reagent in academic and industrial R&D for exploring new synthetic pathways and creating novel chemical entities.

Basic Information

Product Name	4-Bromobenzenesulfonic Acid Methyl Ester
CAS No.	6213-85-0
Molecular Formula	C7H7BrO3S
Molecular Weight	251.10 g/mol
Synonyms	Methyl 4-Bromobenzenesulfonate; p-Bromobenzenesulfonic Acid Methyl Ester; 4-Bromophenyl Methanesulfonate; Methyl p-Bromobenzenesulfonate; Benzenesulfonic Acid, 4-Bromo-, Methyl Ester; NSC 404087; Methyl 4-Bromophenyl Sulfonate
EINECS	Contact for details

Quality Control

Our 4-Bromobenzenesulfonic Acid Methyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high chemical purity and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all relevant specifications. Our quality commitment ensures the material is suitable for demanding applications in pharmaceutical and fine chemical synthesis.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. The compound is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
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.