Description

Benzenesulfonic Acid, 3-Hydroxy-4-Methoxy- is a versatile aromatic sulfonic acid derivative that serves as a key intermediate in advanced organic synthesis. Its molecular structure, featuring both sulfonic and phenolic functional groups, makes it valuable for introducing specific solubility and reactivity profiles into target molecules. This compound is primarily utilized by manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries for the production of dyes, pigments, and active pharmaceutical ingredients (APIs).

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of various active pharmaceutical ingredients (APIs) and diagnostic agents.
• Dye and Pigment Manufacturing: Used as a coupling agent and intermediate in the production of azo dyes and other high-performance colorants.
• Agrochemical Synthesis: Serves as a precursor in the development of herbicides, fungicides, and other crop protection chemicals.
• Chemical Research & Development: Employed in organic synthesis for introducing sulfonate groups and modifying compound solubility.
• Polymer Modification: Can be used to functionalize polymers, imparting ionic character or specific binding sites.
• Catalyst and Ligand Preparation: Acts as a precursor for sulfonated ligands used in homogeneous catalysis.

Basic Information

Product Name	Benzenesulfonic Acid, 3-Hydroxy-4-Methoxy-
CAS No.	879-98-1
Molecular Formula	C7H8O5S
Molecular Weight	204.20 g/mol
Synonyms	4-Methoxy-3-hydroxybenzenesulfonic acid; 3-Hydroxy-4-methoxybenzenesulfonic acid; 2-Methoxy-5-sulfophenol; 5-Sulfovanillin; Vanillinsulfonic acid; Phenol, 2-methoxy-5-sulfo-; 5-Hydroxy-2-methoxybenzenesulfonic acid
EINECS	212-915-9

Quality Control

Every batch of Benzenesulfonic Acid, 3-Hydroxy-4-Methoxy- is produced and tested under a strict quality management system. We ensure compliance with relevant industry standards for chemical intermediates. Comprehensive testing includes identity confirmation, purity assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and consistent quality for your production processes.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and handling properties. Keep away from incompatible materials such as strong bases and oxidizing agents.

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	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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