Description

3,3'-[(3,3'-Dimethoxy-1,1'-Biphenyl-4,4'-Diyl)Bis(Azo)]Bis[7-Amino-4-Hydroxy-2-Naphthalenesulfonic Acid]Disodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing vibrant and stable dyes and pigments, particularly for demanding applications requiring specific color properties and fastness. It is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of complex, high-value azo dyes, especially for cotton and other cellulosic fibers.
• Textile Dye Manufacturing: Used to produce dyes that offer excellent wash and light fastness, crucial for high-quality apparel and home textiles.
• Inkjet and Printing Ink Formulation: Employed in creating specialized inks where color intensity, stability, and compatibility are critical.
• Liquid Crystal Display (LCD) Color Filters: Potential use in the production of colorants for electronic display applications.
• Biological Staining Reagents: May be utilized in the development of histological stains for microscopy and diagnostic applications.
• Research & Development: Serves as a precise chemical entity for academic and industrial research in organic synthesis, dye chemistry, and material science.

Basic Information

Product Name	3,3'-[(3,3'-Dimethoxy-1,1'-Biphenyl-4,4'-Diyl)Bis(Azo)]Bis[7-Amino-4-Hydroxy-2-Naphthalenesulfonic Acid]Disodium Salt
CAS No.	6428-77-9
Molecular Formula	C40H28N6Na2O12S2
Molecular Weight	894.78 g/mol
Synonyms	Direct Blue 1; C.I. 24410; Pontamine Blue 3BX; Diazol Blue 3B; Azo Blue 3B; 3,3'-[(3,3'-Dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(diazene-2,1-diyl)]bis(7-amino-4-hydroxynaphthalene-2-sulfonic acid) disodium salt; Benzenesulfonic acid, 7-amino-4-hydroxy-3-[[4-[[7-amino-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-, disodium salt
EINECS	229-181-1

Quality Control

Our production of 3,3'-[(3,3'-Dimethoxy-1,1'-Biphenyl-4,4'-Diyl)Bis(Azo)]Bis[7-Amino-4-Hydroxy-2-Naphthalenesulfonic Acid]Disodium Salt adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to verify identity, strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment to support your quality assurance and regulatory needs.

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 light-sensitive (store away from light) and hygroscopic (moisture-sensitive); therefore, containers must be kept sealed when not in use to prevent moisture absorption and degradation.

Specification

Item	Specification
Appearance	Dark blue to purple powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Reported on COA
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%
Solubility (in Water)	Freely soluble

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