Description

4-Amino-3,5-Dimethyl-Benzenesulfonic Acid is a specialized aromatic sulfonic acid derivative that serves as a critical intermediate in advanced organic synthesis. Its value lies in its dual functionality, featuring both a reactive amino group and a sulfonic acid moiety, enabling its use in the production of complex molecules. This compound is essential for manufacturers in the pharmaceutical, agrochemical, and dye industries seeking to develop high-performance active ingredients and colorants.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfonamide-based drugs and other therapeutic agents.
• Agrochemical Synthesis: Used in the production of modern herbicides, fungicides, and pesticides, where its structure contributes to efficacy and environmental profile.
• Dye and Pigment Manufacturing: Acts as a crucial intermediate for azo dyes and other high-performance colorants, providing chromophore structure and solubility.
• Chemical Research & Development: Employed in R&D laboratories for exploring new synthetic pathways and developing novel specialty chemicals.
• Polymer Modification: Utilized to introduce sulfonic acid groups into polymers, enhancing properties like hydrophilicity or ion-exchange capacity.
• Catalyst and Ligand Preparation: Serves as a precursor for creating specialized catalysts or ligands used in asymmetric synthesis and other catalytic processes.

Basic Information

Product Name	4-Amino-3,5-Dimethyl-Benzenesulfonic Acid
CAS No.	20804-27-7
Molecular Formula	C8H11NO3S
Molecular Weight	201.24 g/mol
Synonyms	2,4-Dimethyl-6-aminobenzenesulfonic Acid; 4-Amino-3,5-dimethylbenzenesulphonic Acid; 6-Amino-2,4-dimethylbenzenesulfonic Acid; 2,4-Dimethylaniline-6-sulfonic Acid; 3,5-Dimethyl-4-aminobenzenesulfonic Acid; 4-Amino-3,5-xylenesulfonic Acid; 2,4-Dimethyl-6-sulfoaniline
EINECS	Contact for details

Quality Control

Our 4-Amino-3,5-Dimethyl-Benzenesulfonic Acid is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for use in sensitive applications like pharmaceutical synthesis. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance.

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). This product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent absorption of atmospheric moisture. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%

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