Description

Hexasodium 6,6'-[Vinylenebis[(3-Sulphonato-4,1-Phenylene)Azo]]Bis[4-Amino-5-Hydroxynaphthalene-1,3-Disulphonate] is a high-purity, water-soluble anionic dye intermediate belonging to the class of polyazo compounds. Its complex molecular structure, featuring multiple sulphonate groups, provides excellent solubility and strong substantivity, making it a critical precursor for synthesizing high-performance dyes. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce vibrant, wash-fast, and light-fast colorants. The product is supplied with a CAS No. 10534-74-4.

Application

This versatile dye intermediate is engineered for demanding coloration processes where performance and consistency are paramount.

• Textile Dyeing: Primary use as a key intermediate for synthesizing reactive, direct, and acid dyes for cotton, wool, silk, and nylon.
• Leather Coloring: Used in the production of dyes for achieving deep, uniform, and durable colors on leather goods.
• Ink Manufacturing: Serves as a precursor for high-quality pigments and dyes used in specialty inks for packaging and security printing.
• Paper Coloring: Intermediate for dyes applied in the coloring of high-grade papers and decorative laminates.
• Biological Staining: Potential use in the synthesis of histological stains for laboratory and diagnostic applications.
• Research & Development: Serves as a standard or building block in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	Hexasodium 6,6'-[Vinylenebis[(3-Sulphonato-4,1-Phenylene)Azo]]Bis[4-Amino-5-Hydroxynaphthalene-1,3-Disulphonate]
CAS No.	10534-74-4
Molecular Formula	C40H20N6Na6O20S6
Molecular Weight	~1250.84 g/mol
Synonyms	Hexasodium 6,6'-[1,2-Ethenediylbis[(3-sulfo-4,1-phenylene)azo]]bis[4-amino-5-hydroxy-1,3-naphthalenedisulfonate]; C.I. Direct Blue 78 Intermediate; Direct Blue 78 Intermediate Salt; 6,6'-[1,2-Ethenediylbis[(3-sulfonato-4,1-phenylene)azo]]bis[4-amino-5-hydroxynaphthalene-1,3-disulfonate] hexasodium salt; Vinylene Bis(3-sulfophenylazo) Derivative Hexasodium Salt; Acid Blue 92 Related Intermediate; Polyazo Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment, ensuring full traceability and compliance with your internal specifications.

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). The product is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Solubility (in Water)	Freely soluble
Moisture Content (KF)	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm

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