Description

4-Amino-5-Methoxy-2-Methylbenzenesulfonic Acid is a key sulfonated aniline derivative, serving as a versatile and high-value intermediate in advanced organic synthesis. Its structure makes it particularly valuable for introducing specific functional groups and modifying solubility in target molecules. This compound is essential for manufacturers and R&D teams in the pharmaceutical, agrochemical, and specialty dye industries seeking to develop new active ingredients and high-performance materials.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a sulfonic acid moiety.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents where its aromatic sulfonic acid group enhances biological activity or formulation properties.
• Dye and Pigment Manufacturing: Acts as an intermediate for azo dyes and other colorants, contributing to chromophore development and improving dye fastness and solubility.
• Chemical Research & Development: Employed in organic synthesis labs for constructing complex molecules, studying reaction mechanisms, and developing new synthetic methodologies.
• Specialty Chemical Production: Serves as a precursor for surfactants, corrosion inhibitors, and other functional chemicals where the amino and sulfonic acid groups offer unique properties.

Basic Information

Product Name	4-Amino-5-Methoxy-2-Methylbenzenesulfonic Acid
CAS No.	6471-78-9
Molecular Formula	C8H11NO4S
Molecular Weight	217.24 g/mol
Synonyms	2-Methyl-4-amino-5-methoxybenzenesulfonic Acid; 5-Methoxy-2-methyl-4-aminobenzenesulfonic Acid; 4-Amino-5-methoxy-o-toluenesulfonic Acid; 2-Methyl-5-methoxy-1,4-phenylenediamine-4-sulfonic Acid; 1-Amino-2-methoxy-5-methyl-4-sulfonic acid benzene; 4-Amino-5-methoxy-2-methylphenylsulfonic acid; 6-Amino-3-methoxytoluene-4-sulfonic Acid
EINECS	229-289-9

Quality Control

Our 4-Amino-5-Methoxy-2-Methylbenzenesulfonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for industrial and research use. Certificates of Analysis (COA) documenting batch-specific results are available upon request to support your quality assurance and regulatory compliance needs.

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) and should be kept under dry conditions to prevent caking or decomposition. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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