Description

3-Methoxysulphanilic Acid is a specialized aromatic sulfonic acid derivative, serving as a crucial intermediate in advanced organic synthesis. Its value lies in its unique methoxy-substituted aniline sulfonic acid structure, which provides specific reactivity and solubility profiles essential for manufacturing high-value compounds. This product is primarily needed by manufacturers in the pharmaceutical, dye, and agrochemical industries for the production of active ingredients, pigments, and functional chemicals.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfa drugs and other therapeutic agents.
• Dye and Pigment Manufacturing: Essential precursor for producing azo dyes, acid dyes, and other colorants, contributing to color fastness and solubility.
• Agrochemical Synthesis: Used in the production of herbicides, pesticides, and plant growth regulators requiring specific sulfonamide functionalities.
• Chemical Research & Development: Valuable reagent in organic chemistry labs for constructing complex molecules and studying sulfonation reactions.
• Photographic Chemical: Component in certain photographic developers and sensitizers due to its light-sensitive properties.
• Corrosion Inhibitor Formulation: Used in specialty chemical blends designed to protect metals in industrial systems.

Basic Information

Product Name	3-Methoxysulphanilic Acid
CAS No.	6472-58-8
Molecular Formula	C7H9NO4S
Molecular Weight	203.22 g/mol
Synonyms	3-Methoxy-4-aminobenzenesulfonic acid; 4-Amino-3-methoxybenzenesulfonic acid; 2-Methoxy-5-aminobenzenesulfonic acid; Aniline-3-methoxy-4-sulfonic acid; 3-Methoxyaniline-4-sulfonic acid; 3-Methoxy-4-sulfoaniline; 4-Amino-3-methoxyphenylsulfonic acid; 3-Methoxysulfanilic Acid
EINECS	229-299-9

Quality Control

Our 3-Methoxysulphanilic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets the high-purity standards required for sensitive synthesis applications. We provide detailed Certificates of Analysis (COA) with key parameters including assay, impurity profile, and identification, supporting compliance with cGMP and ISO 9001 guidelines where applicable.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. Due to its light-sensitive nature, the container should be opaque or stored in darkness.

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	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility	Soluble in alkaline solutions; sparingly soluble in water

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