Description

m-Toluenesulfonic Acid, 4-Amino-5-Methoxy- is a specialized aromatic sulfonic acid derivative that serves as a high-value synthetic intermediate. Its unique structure, combining an amino and a methoxy substituent on the toluenesulfonic acid backbone, makes it a critical building block for constructing complex molecules. This compound is essential for research and production in advanced pharmaceutical development and fine chemical synthesis, where precise molecular architecture is required.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs targeting specific receptors or requiring sulfonamide functionalities.
• Agrochemical Synthesis: Used in the development of advanced herbicides, fungicides, and plant growth regulators that benefit from its sulfonic acid group for bioavailability.
• Dye and Pigment Manufacturing: Serves as an intermediate for producing azo dyes and other complex colorants, where the amino and sulfonic acid groups aid in chromophore formation and solubility.
• Polymer Chemistry: Acts as a monomer or modifying agent for creating specialty polymers with enhanced properties like ionic conductivity or specific chemical resistance.
• Research & Development: A valuable reagent in organic chemistry labs for method development and the construction of novel molecular libraries for screening.
• Fine Chemical Production: Employed in the multi-step synthesis of complex organic compounds for electronics, catalysis, and material science applications.

Basic Information

Product Name	m-Toluenesulfonic Acid, 4-Amino-5-Methoxy-
CAS No.	808769-56-4
Molecular Formula	C8H11NO4S
Molecular Weight	217.24 g/mol
Synonyms	4-Amino-5-methoxy-2-methylbenzenesulfonic acid; 2-Methyl-4-amino-5-methoxybenzenesulfonic acid; 5-Methoxy-4-amino-o-toluenesulfonic acid; 4-Amino-5-methoxy-m-toluenesulfonic acid; 4-Amino-5-methoxytoluene-2-sulfonic acid; 2-Methyl-5-methoxy-1,4-benzenediamine-3-sulfonic acid (related form); Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our m-Toluenesulfonic Acid, 4-Amino-5-Methoxy- is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) is provided with each shipment, detailing specifications such as assay, impurity profile, and physical characteristics. We adhere to cGMP principles where applicable to support our clients in regulated industries.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (typically 15-25°C). Keep away from strong oxidizing agents, strong bases, and incompatible materials. Due to the presence of amino and sulfonic acid groups, the material may be hygroscopic; minimize exposure to atmospheric moisture during handling.

Specification

Item	Specification
Appearance	Off-white to light tan 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
Related Substances (HPLC)	Total impurities ≤ 2.0%
Single Unknown Impurity	≤ 0.5%

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