Description

3-Methoxy-Benzenesulfonic Acid is a versatile aromatic sulfonic acid derivative characterized by its methoxy substituent. This compound serves as a valuable building block and intermediate in advanced organic synthesis, particularly for introducing the sulfonic acid functional group into target molecules. It is essential for manufacturers and R&D teams in the pharmaceutical, agrochemical, and specialty chemical sectors seeking to develop new active ingredients or functional materials.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), especially for compounds requiring sulfonamide or sulfonate ester functionalities.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents where the sulfonic acid group enhances solubility or biological activity.
• Dye and Pigment Manufacturing: Acts as an intermediate in the creation of sulfonated dyes, improving water solubility and fiber affinity.
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers, which can be used to create ion-exchange resins or proton-conducting membranes.
• Catalyst and Ligand Preparation: Serves as a starting material for synthesizing metal-organic catalysts and specialized ligands used in homogeneous catalysis.
• Research & Development: A crucial reagent in academic and industrial R&D for exploring new chemical reactions and developing novel synthetic methodologies.

Basic Information

Item	Details
Product Name	3-Methoxy-Benzenesulfonic Acid
CAS No.	34256-01-4
Molecular Formula	C7H8O4S
Molecular Weight	188.20 g/mol
Synonyms	m-Methoxybenzenesulfonic Acid; 3-Methoxybenzenesulphonic Acid; Meta-Methoxybenzenesulfonic Acid; 3-Methoxyphenylsulfonic Acid; Benzenesulfonic acid, 3-methoxy-; AS-67728; LS-146300
EINECS	Contact for details

Quality Control

Our 3-Methoxy-Benzenesulfonic Acid is produced under a stringent quality management system. Every batch undergoes comprehensive analytical testing to ensure high purity, consistency, and traceability. We provide detailed Certificates of Analysis (COA) with each shipment, documenting key parameters such as assay, identity, and impurity profiles. Our quality commitment supports applications requiring reliable and reproducible chemical performance.

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 kept tightly sealed to prevent absorption of atmospheric moisture, which may affect quality.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Melting Point	Contact for details
Heavy Metals	< 20 ppm

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