Description

p-Toluenesulfinic Acid Sodium Salt Tetrahydrate is a versatile organosulfur compound widely utilized as a key reagent and intermediate in synthetic organic chemistry. Its primary value lies in its role as a nucleophilic sulfinate source, enabling critical carbon-sulfur bond-forming reactions essential for constructing complex molecules. This product is particularly important for research and development chemists in the pharmaceutical, agrochemical, and specialty chemical industries seeking to synthesize sulfones, sulfonamides, and other sulfur-containing derivatives.

Application

• Pharmaceutical Intermediate: A crucial building block for the synthesis of active pharmaceutical ingredients (APIs) containing sulfone or sulfonamide functional groups.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and insecticides where the sulfinic acid moiety is a key structural component.
• Polymer Modification: Acts as a functional monomer or chain-transfer agent in the synthesis of specialty polymers with tailored properties.
• Organic Synthesis Reagent: Employed in nucleophilic addition reactions, cross-coupling processes, and as a precursor to sulfonyl radicals.
• Chemical Research: Serves as a standard reagent in methodological development and catalysis studies within academic and industrial R&D laboratories.
• Dye and Pigment Manufacturing: Utilized as an intermediate in the synthesis of certain sulfur-based dyes and colorants.

Basic Information

Product Name	p-Toluenesulfinic Acid Sodium Salt Tetrahydrate
CAS No.	868858-48-4
Molecular Formula	C7H7NaO2S · 4H2O
Molecular Weight	246.23 g/mol (Anhydrous basis: 174.18 g/mol)
Synonyms	Sodium p-Toluenesulfinate Tetrahydrate; Sodium 4-Methylbenzenesulfinate Tetrahydrate; Tosylsulfinic Acid Sodium Salt Tetrahydrate; 4-Toluenesulfinic Acid Sodium Salt Tetrahydrate; p-Tolylsulfinic Acid Sodium Salt Tetrahydrate; Sodium Tosylsulfinate Tetrahydrate; Benzenesulfinic acid, 4-methyl-, sodium salt, tetrahydrate
EINECS	Contact for details

Quality Control

Our p-Toluenesulfinic Acid Sodium Salt Tetrahydrate is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay by titration, identification by FT-IR, and determination of key impurities, to ensure it meets high-purity standards suitable for synthetic applications. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and safety data is provided with every shipment to guarantee traceability and consistency for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. For long-term storage, consider using desiccants or storing under an inert atmosphere to minimize oxidation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 98.0 % (on anhydrous basis)
Water Content (KF)	26.0 - 31.0 % (Theoretical for Tetrahydrate: 29.26%)
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1 %
Solubility	Freely soluble in water

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