Description

o-Methoxybenzenesulphinic Acid is a specialized organosulfur compound that serves as a versatile building block and intermediate in fine chemical synthesis. Its unique structure, featuring both a sulfinic acid group and a methoxy substituent, makes it a valuable reagent for introducing sulfur-containing moieties and for use in various coupling and functionalization reactions. This chemical is primarily utilized by research institutions and manufacturers in the pharmaceutical, agrochemical, and advanced material sectors for developing new active ingredients and functional polymers.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel drug candidates, particularly those requiring sulfone or sulfonamide functionalities.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents where the benzenesulphinic acid core is integral.
• Polymer & Material Science: Acts as a monomer or modifier in the creation of specialty polymers, resins, and high-performance materials with specific chemical resistance or thermal properties.
• Organic Synthesis Reagent: Employed in research laboratories for sulfinylation reactions, as a precursor to sulfoxides, and in the construction of complex molecular architectures.
• Dye & Pigment Manufacturing: Intermediate in the synthesis of sulfur-based dyes and organic pigments.
• Cross-coupling Reactions: Useful in palladium-catalyzed coupling reactions to form carbon-sulfur bonds.

Basic Information

Product Name	o-Methoxybenzenesulphinic Acid
CAS No.	13165-78-1
Molecular Formula	C7H8O3S
Molecular Weight	172.20 g/mol
Synonyms	2-Methoxybenzenesulfinic Acid; o-Anisylsulfinic Acid; 2-Methoxyphenylsulfinic Acid; Benzenesulfinic Acid, 2-methoxy-; (2-Methoxyphenyl)sulfinic Acid; 2-Methoxybenzenesulphinic Acid; 2-Methoxybenzene-1-sulfinic Acid
EINECS	Contact for details

Quality Control

Our o-Methoxybenzenesulphinic Acid is manufactured under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide Certificates of Analysis (COA) with key parameters including assay, impurity profile, and physical characteristics. Our quality system is designed to meet the stringent requirements of GMP and ISO standards for advanced chemical intermediates.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated place. Recommended storage temperature is 2-8°C for long-term stability. This material is easily oxidized and moisture-sensitive; ensure containers are sealed immediately after use to minimize exposure to air and humidity. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%

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