Description

[1,1'-Biphenyl]-3,3'-dicarboxylic acid, 4-[[5-[[5-(aminosulfonyl)-2-hydroxyphenyl]azo]-1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]azo]-4'-[[1-[[(3-carboxy-4-hydroxyphenyl)amino]carbonyl]-2-oxopropyl]azo]-, tetrasodium salt is a high-purity, complex azo dye intermediate designed for advanced colorant synthesis. This compound is valued for its ability to impart specific, stable color properties and functional groups for further chemical modification in demanding applications. It is primarily utilized by manufacturers in the textile, ink, and specialty polymer industries seeking to develop high-performance dyes and pigments.

Application

• Textile Dyeing: As a key intermediate for synthesizing high-grade, wash-fast azo dyes for natural and synthetic fibers.
• Ink Manufacturing: Used in the production of specialized pigments for industrial printing inks, including packaging and security inks.
• Functional Polymer Colorants: Incorporation into polymers and plastics where specific color and stability under processing conditions are required.
• Research & Development: Serves as a building block in chemical research for developing novel chromophores and functional materials.
• Liquid Crystal Display (LCD) Color Filters: Potential use in the synthesis of colorants for electronic display applications.

Basic Information

Product Name	[1,1'-Biphenyl]-3,3'-dicarboxylic acid, 4-[[5-[[5-(aminosulfonyl)-2-hydroxyphenyl]azo]-1-hydroxy-6-(phenylamino)-3-sulfo-2-naphthalenyl]azo]-4'-[[1-[[(3-carboxy-4-hydroxyphenyl)amino]carbonyl]-2-oxopropyl]azo]-, tetrasodium salt
CAS No.	72252-59-6
Molecular Formula	C52H34N8Na4O20S4
Molecular Weight	~1290.0 g/mol (Contact for exact details)
Synonyms	72252-59-6; Tetrasodium 4,4'-bis[[1-[[(3-carboxy-4-hydroxyphenyl)carbamoyl]-2-oxopropyl]azo]-3,3'-biphenyldicarboxylate derivative; C.I. Direct Brown 209; Direct Brown 209; Azo dye intermediate 72252-59-6; Complex azo biphenyl tetrasodium salt; 3,3'-Biphenyldicarboxylic acid azo dye salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed using modern analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance 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); ensure containers are kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Loss on Drying	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (Water)	Partially soluble

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