Description

4,4'-(4,4'-Biphenyldiylbis(Sulfonylamino))Bis(5-Hydroxy-2,7-Naphthalenedisulfonic Acid) is a high-purity, multi-sulfonated aromatic compound designed for advanced chemical synthesis and material science applications. This specialized chemical serves as a critical building block or functional additive, valued for its ability to impart solubility, acidity, and complexing properties. It is essential for researchers and manufacturers in the fields of specialty dyes, polymer modification, analytical chemistry, and pharmaceutical intermediate development.

Application

• Specialty Dye & Pigment Intermediate: Acts as a key precursor or solubilizing agent in the synthesis of high-performance, water-soluble dyes and pigments.
• Polymer Modification: Used to introduce sulfonic acid groups into polymers, enhancing properties like hydrophilicity, ion-exchange capacity, and conductivity for advanced materials.
• Analytical Reagent & Chelating Agent: Employed in analytical chemistry as a complexing agent for metal ions or as a component in specialized detection systems.
• Pharmaceutical Intermediate: Serves as a sophisticated building block in the multi-step synthesis of complex active pharmaceutical ingredients (APIs).
• Catalyst & Ligand Synthesis: Utilized in the preparation of ligands for catalysis or as a component of catalytic systems requiring strong acid functionality.
• Surface Treatment & Functionalization: Applied in surface chemistry to modify material interfaces, improving adhesion, wettability, or anti-static properties.

Basic Information

Product Name	4,4'-(4,4'-Biphenyldiylbis(Sulfonylamino))Bis(5-Hydroxy-2,7-Naphthalenedisulfonic Acid)
CAS No.	130798-64-0
Molecular Formula	C32H22N2O18S6
Molecular Weight	922.86 g/mol
Synonyms	4,4'-(4,4'-Biphenyldiylbis(Sulfonylamino))bis(5-hydroxy-2,7-naphthalenedisulfonic acid); 5,5'-[4,4'-Biphenyldiylbis(sulfonylimino)]bis(6-hydroxy-1,3-naphthalenedisulfonic acid); Tetrasodium 4,4'-(4,4'-biphenyldiylbis(sulfonylamino))bis(5-hydroxy-2,7-naphthalenedisulfonate) (salt form); Biphenyl-4,4'-diylbis[sulfonyl(5-hydroxy-2,7-naphthalenedisulfonic acid)imide]; Acid Yellow 219 (related dye classification); Contact for additional trade names.
EINECS	Contact for details

Quality Control

Every batch of 4,4'-(4,4'-Biphenyldiylbis(Sulfonylamino))Bis(5-Hydroxy-2,7-Naphthalenedisulfonic Acid) is manufactured and tested under a strict quality management system. Our products undergo rigorous analytical testing, including HPLC for purity, titration for assay, and spectroscopic identification, to ensure they meet precise customer specifications and consistent batch-to-batch performance. Comprehensive Certificates of Analysis (COA) documenting all critical parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	Yellow to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Purity (HPLC, Area%)	≥ 98.0%
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear, yellow solution

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