Description

4,4'-Thiobis(Benzenesulfonic Acid) is an important organic sulfur compound and a versatile chemical intermediate. Its bifunctional structure, featuring two sulfonic acid groups linked by a thioether bridge, makes it a valuable building block for synthesizing specialty chemicals and functional materials. This product is primarily utilized by manufacturers in the polymer, pharmaceutical, and agrochemical industries for applications requiring sulfonation, cross-linking, or the introduction of anionic charge.

Application

• Polymer Industry: As a monomer or cross-linking agent for the synthesis of ion-exchange resins, polyelectrolytes, and specialty polymers.
• Pharmaceutical Intermediates: Used in the synthesis of active pharmaceutical ingredients (APIs) and drug candidates, particularly those requiring sulfonate functionalities.
• Agrochemical Synthesis: Serves as a key intermediate in the production of certain herbicides, fungicides, and plant growth regulators.
• Dye and Pigment Manufacturing: Acts as a sulfonating agent or an intermediate in the production of water-soluble dyes and organic pigments.
• Electroplating Additives: Employed in electroplating baths as a brightening agent or stabilizer for specific metal deposition processes.
• Research & Development: Used in academic and industrial R&D labs for exploring new materials, catalysts, and chemical reactions.

Basic Information

Product Name	4,4'-Thiobis(Benzenesulfonic Acid)
CAS No.	19878-55-8
Molecular Formula	C₁₂H₁₀O₆S₃
Molecular Weight	370.40 g/mol
Synonyms	4,4'-Sulfonyldibenzenesulfonic Acid; Bis(4-sulfophenyl) Sulfone; 4,4'-Dithiodibenzenesulfonic Acid (related); p,p'-Thiobis(benzenesulfonic acid); 4,4'-Thiodibenzenesulfonic Acid; TBSA; Thiobisbenzenesulfonic Acid; 1,1'-Sulfonylbis(4-benzene sulfonic acid)
EINECS	243-371-5

Quality Control

Our 4,4'-Thiobis(Benzenesulfonic Acid) is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and consistency. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical characteristics are provided with every shipment to guarantee reliable performance in your 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 material is hygroscopic (moisture-sensitive) and should be kept under dry conditions to prevent caking or decomposition. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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