Description

4,4'-Biphenyldisulfonic Acid is a high-purity organic acid derivative featuring two sulfonic acid groups on a biphenyl core. This compound is a versatile and valuable chemical intermediate for synthesizing more complex molecules, particularly in advanced material science. It is primarily sought after by manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries for creating dyes, liquid crystals, and functional monomers.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs requiring sulfonated aromatic structures.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators.
• Dye & Pigment Manufacturing: Serves as a precursor for sulfonated azo dyes and other colorants with enhanced water solubility and fastness properties.
• Liquid Crystal Production: An important intermediate for creating sulfonated biphenyl-based liquid crystals used in display technologies.
• Polymer & Resin Modification: Incorporated into polymer chains to introduce sulfonic acid groups, imparting ion-exchange capabilities or improving hydrophilicity in specialty resins and membranes.
• Cross-coupling Reactions: Acts as a substrate or ligand in palladium-catalyzed cross-coupling reactions for constructing complex biaryl systems.
• Catalyst & Ligand Synthesis: Used to prepare sulfonated ligands for metal complexes in homogeneous catalysis.
• Research & Development: Employed in academic and industrial R&D for exploring new organic synthesis pathways and material properties.

Basic Information

Product Name	4,4'-Biphenyldisulfonic Acid
CAS No.	5314-37-4
Molecular Formula	C12H10O6S2
Molecular Weight	314.33 g/mol
Synonyms	[1,1'-Biphenyl]-4,4'-disulfonic Acid; 4,4'-Biphenyldisulphonic Acid; p,p'-Biphenyldisulfonic Acid; 4,4'-Dihydroxybiphenyl-3,3'-disulfonic Acid (tautomer); Biphenyl-4,4'-disulfonic Acid; 4,4'-Bibenzyldisulfonic Acid (common misnomer); BPDSA; BDS Acid
EINECS	226-158-6

Quality Control

Our 4,4'-Biphenyldisulfonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and spectroscopic identification (IR, NMR), to ensure it meets exacting specifications for use in sensitive synthesis applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 after opening to prevent absorption of atmospheric moisture. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 1.0%

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