Description

Pyridinium, 1,1'-[(1-amino-8-hydroxy-3,6-disulfo-2,7-naphthalenediyl)bis[azo(4-sulfo-3,1-phenylene) imino[6-[(4-chloro-3-sulfophenyl)amino]-1,3,5-triazine-4,2-diyl]]]bis[3-carboxy-, dihydroxide, hexasodium salt is a high-purity, water-soluble reactive dye intermediate of significant industrial importance. Its complex polyazo structure, featuring multiple sulfonate groups and a triazine linker, provides exceptional chromophoric strength and binding affinity for cellulosic fibers. This compound is essential for manufacturers requiring advanced, colorfast dyes and pigments for textiles, inks, and specialty coatings.

Application

• Reactive Dye Synthesis: A key precursor for manufacturing high-performance reactive dyes used in cotton, viscose, and other cellulosic fiber dyeing and printing.
• Textile Industry: Imparts vibrant, wash-fast, and light-fast colors in textile processing, crucial for producing durable fabrics.
• Inkjet Inks: Used in the formulation of professional-grade pigment inks for digital textile printing, offering excellent color gamut and stability.
• Paper Coloring: Employed in the production of specialty colored papers where high color strength and fastness are required.
• Leather Dyeing: Provides deep, uniform coloration for leather goods with good penetration and fastness properties.
• Research & Development: Serves as a critical intermediate in R&D for developing new chromophores and functional dyes with specific properties.

Basic Information

Item	Detail
Product Name	Pyridinium, 1,1'-[(1-amino-8-hydroxy-3,6-disulfo-2,7-naphthalenediyl)bis[azo(4-sulfo-3,1-phenylene) imino[6-[(4-chloro-3-sulfophenyl)amino]-1,3,5-triazine-4,2-diyl]]]bis[3-carboxy-, dihydroxide, hexasodium salt
CAS No.	89797-03-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5 (tetrasodium salt form); Reactive Black 5; Remazol Black B; Levafix Black E-B; Sumifix Black B; Drimarene Black K-2B; Hexasodium 4-amino-5-hydroxy-3,6-bis((4-((2-(sulfonatooxy)ethyl)sulfonyl)phenyl)diazenyl)naphthalene-2,7-disulfonate (related structure); Polyazo reactive dye intermediate; Tetrasodium 4-amino-5-hydroxy-6-((4-((2-(sulfonatooxy)ethyl)sulfonyl)phenyl)diazenyl)-3-((4-((2-(sulfonatooxy)ethyl)sulfonyl)-2-sulfonatophenyl)diazenyl)naphthalene-2,7-disulfonate (common form).
EINECS	Contact for details

Quality Control

Our production of this reactive dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance in downstream synthesis. Quality is verified through advanced analytical techniques including HPLC for purity and spectrophotometry for color strength. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Color Strength	100% ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	6.0 - 8.0
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.