Description

5-Bromo-2-Methylbenzene-1-Sulfonic Acid is a versatile aromatic sulfonic acid derivative that serves as a key synthetic intermediate in advanced organic chemistry. Its value lies in the combination of a reactive sulfonic acid group and a bromine substituent, enabling precise functionalization and directing further chemical transformations. This compound is primarily needed by manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries for the synthesis of active ingredients, dyes, and complex organic molecules.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for molecules requiring a substituted benzene sulfonate core.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents where the bromo and sulfonic acid groups introduce specific biological activity.
• Dye and Pigment Manufacturing: Acts as a precursor for sulfonated azo dyes and other colorants, providing water solubility and chromophore structure.
• Polymer Modification: Employed to introduce sulfonate groups into polymers, enhancing properties like hydrophilicity, ion-exchange capacity, or dyeability.
• Chemical Research & Development: Serves as a standard reagent in organic synthesis labs for coupling reactions, metal-catalyzed cross-couplings, and as a directing group in electrophilic aromatic substitution.
• Ligand and Catalyst Preparation: Useful for synthesizing specialized ligands for metal complexes used in homogeneous catalysis.

Basic Information

Product Name	5-Bromo-2-Methylbenzene-1-Sulfonic Acid
CAS No.	56919-17-6
Molecular Formula	C7H7BrO3S
Molecular Weight	251.10 g/mol
Synonyms	2-Methyl-5-bromobenzenesulfonic acid; 5-Bromo-o-toluenesulfonic acid; 5-Bromo-2-methylbenzenesulfonic acid; 2-Methyl-5-bromophenylsulfonic acid; 1-Bromo-4-methyl-3-sulfobenzene; 5-Bromo-2-toluenesulfonic acid; Benzenesulfonic acid, 5-bromo-2-methyl-
EINECS	Contact for details

Quality Control

Our 5-Bromo-2-Methylbenzene-1-Sulfonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets the high-purity standards required for synthetic applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and batch-to-batch consistency for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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