Description

Tetrasodium 4,4'-[(3,3'-Dimethoxy[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[3-Hydroxynaphthalene-2,7-Disulphonate] is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing high-performance dyes and pigments, particularly direct and reactive dyes known for their strong color strength and good lightfastness. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, durable colors. The product is supplied with a CAS No. 65151-33-9.

Application

This versatile azo dye intermediate serves as a critical building block in several high-value industrial colorant processes. Its primary and related applications include:

• Primary Precursor for Direct Dyes: Synthesis of direct cotton dyes, valued for their application without a mordant.
• Manufacture of Reactive Dyes: Key intermediate in producing reactive dyes for cellulose fibers like cotton and viscose, ensuring excellent wash-fastness.
• Production of Pigments: Used in the manufacture of high-performance organic pigments for inks, plastics, and coatings.
• Textile Dyeing and Printing: Enables the creation of specific, vivid shades in textile finishing processes.
• Specialty Ink Formulations: Contributes to the colorant system in inks for packaging, security, and digital printing.
• Research & Development: Serves as a standard or starting material in R&D for novel dye and functional material synthesis.

Basic Information

Product Name	Tetrasodium 4,4'-[(3,3'-Dimethoxy[1,1'-Biphenyl]-4,4'-Diyl)Bis(Azo)]Bis[3-Hydroxynaphthalene-2,7-Disulphonate]
CAS No.	65151-33-9
Molecular Formula	C40H24N4Na4O16S4
Molecular Weight	1032.8 g/mol (approx.)
Synonyms	Direct Blue 106 (Parent Dye); C.I. 51300; Tetrasodium 3,3'-Dimethoxy-4,4'-biphenylenebis(azo)bis(5-hydroxy-6,7-naphthalenedisulfonate); 3,3'-Dimethoxybenzidine based azo dye intermediate; 4,4'-Bis(3-hydroxy-2,7-disulfo-1-naphthylazo)-3,3'-dimethoxybiphenyl tetrasodium salt; Azo Dye Intermediate 65151-33-9; Direct Blue 106 Intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark blue to purple powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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