Description

4-Methylbenzenesulfinic Acid Hydrate is an organosulfur compound that serves as a versatile synthetic intermediate and reducing agent. Its value lies in its ability to act as a source of the p-toluenesulfinate anion, which is pivotal in various organic transformations and pharmaceutical syntheses. This chemical is essential for R&D laboratories and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking to build complex molecular architectures.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly those containing sulfone or sulfonamide functional groups.
• Organic Synthesis Reagent: Employed as a nucleophilic sulfinating agent in cross-coupling reactions and for the introduction of sulfonyl groups into target molecules.
• Polymer Chemistry: Used in the production of specialty polymers and as a modifier or chain-transfer agent in certain polymerization processes.
• Agrochemical Synthesis: Functions as an intermediate in the manufacture of herbicides, fungicides, and other crop protection agents.
• Catalyst and Ligand Preparation: Serves as a precursor for metal-complexing ligands and catalysts used in asymmetric synthesis.
• Research & Development: A valuable tool for medicinal chemistry and process chemistry research in academic and industrial settings.

Basic Information

Product Name	4-Methylbenzenesulfinic Acid Hydrate
CAS No.	1588441-34-2
Molecular Formula	C7H8O2S • xH2O
Molecular Weight	156.20 (Anhydrous basis)
Synonyms	p-Toluenesulfinic Acid Hydrate; 4-Toluenesulfinic Acid Hydrate; Tosylsulfinic Acid Hydrate; Benzenesulfinic acid, 4-methyl-, hydrate; Toluene-4-sulfinic acid hydrate
EINECS	Contact for details

Quality Control

Our 4-Methylbenzenesulfinic Acid Hydrate is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing, including assay, identification, and impurity profiling, to ensure it meets the high standards required for synthetic applications. A Certificate of Analysis (COA) detailing purity, physical characteristics, and test results is provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic and easily oxidized nature, it is recommended to handle the material under an inert atmosphere and minimize exposure to air and moisture for long-term stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Residue on Ignition	≤ 0.1%

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