Description

Benzenesulfinic Acid Sodium Salt Dihydrate is an organosulfur compound widely used as a versatile nucleophile and reducing agent in organic synthesis. Its value lies in its ability to introduce the phenylsulfonyl group and participate in key reactions like sulfonylation and radical processes. This chemical is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries, where it serves as a critical building block for active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of sulfonamide drugs and other active pharmaceutical ingredients (APIs).
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators.
• Polymer & Material Science: Acts as a chain transfer agent or modifier in polymerization reactions and for surface functionalization.
• Organic Synthesis Reagent: Employed as a nucleophile in Michael additions, cross-coupling reactions, and for the preparation of sulfones and sulfoxides.
• Photographic Industry: Functions as a developing agent or stabilizer in certain photographic chemical formulations.
• Research & Development: A valuable tool in academic and industrial R&D for exploring new synthetic methodologies.

Basic Information

Product Name	Benzenesulfinic Acid Sodium Salt Dihydrate
CAS No.	25932-11-0
Molecular Formula	C6H5NaO2S · 2H2O
Molecular Weight	192.17 g/mol (Anhydrous basis: 156.12 g/mol)
Synonyms	Sodium benzenesulfinate dihydrate; Benzenesulfinic acid sodium salt; Sodium phenylsulfinate; Phenylsulfinic acid sodium salt; Benzenesulfinate sodium salt dihydrate; Sodium benzenesulphinate dihydrate; Benzene sulfinic acid sodium salt; EINECS 247-376-1
EINECS	247-376-1

Quality Control

Our Benzenesulfinic Acid Sodium Salt Dihydrate is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and composition. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, water content, and impurity profiles. Our quality commitment ensures reliable performance for your critical synthesis and 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). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed after opening to minimize exposure to atmospheric moisture and light to maintain product integrity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0 %
Water Content (KF)	16.0 - 19.0 %
pH (5% solution)	7.0 - 9.0
Heavy Metals (as Pb)	≤ 20 ppm

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