Description

4,4'-Biphenyldisulfonic Acid Disodium Salt is a high-purity, water-soluble organic salt derived from biphenyl, serving as a versatile intermediate and functional additive. Its core value lies in its ability to introduce sulfonate groups, imparting solubility, anionic character, and chelating properties to chemical systems. This compound is essential for manufacturers in the fine chemical, pharmaceutical, and advanced material sectors seeking reliable synthesis building blocks and performance modifiers.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring sulfonated biphenyl moieties for enhanced bioavailability or specific activity.
• Dye & Pigment Manufacturing: Acts as a key intermediate or solubilizing agent in the production of water-soluble dyes, optical brighteners, and specialty pigments.
• Polymer & Resin Modification: Incorporated as a comonomer or additive to introduce ionic functionality, improve hydrophilicity, or alter the charge characteristics of polymers and ion-exchange resins.
• Electroplating & Surface Treatment: Functions as a brightening agent, complexant, or conductive salt in electroplating baths and metal surface finishing processes.
• Analytical Chemistry & Research: Serves as a standard, reagent, or building block in chemical research, analytical method development, and laboratory-scale synthesis.
• Catalyst & Ligand Synthesis: Utilized in the preparation of sulfonated ligands or organocatalysts for various organic transformations and industrial catalytic processes.

Basic Information

Product Name	4,4'-Biphenyldisulfonic Acid Disodium Salt
CAS No.	31139-42-1
Molecular Formula	C12H8Na2O6S2
Molecular Weight	358.29 g/mol
Synonyms	Disodium 4,4'-Biphenyldisulfonate; 4,4'-Biphenyldisulfonic Acid Sodium Salt; [1,1'-Biphenyl]-4,4'-disulfonic Acid Disodium Salt; p,p'-Biphenyldisulfonic Acid Disodium Salt; Biphenyl-4,4'-disulfonic Acid Disodium Salt; 4,4'-Disulfobiphenyl Disodium Salt; Biphenyldisulfonate Sodium
EINECS	Contact for details

Quality Control

Our 4,4'-Biphenyldisulfonic Acid Disodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards and consistent specifications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your quality requirements.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
pH (5% Solution)	6.0 - 8.0

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