Description

Pyridinium, 1,1'-[1,4-phenylenebis [imino[6-[[8-hydroxy-3,6-disulfo-7-[(2-sulfophenyl)azo]-1-naphthalenyl]amino]-1,3,5-triazine-4,2-diyl]]]bis[3-carboxy-, dihydroxide, hexasodium salt is a high-purity, water-soluble anionic dye belonging to the reactive dye class, characterized by its complex polyazo and triazine structure. This compound is engineered for exceptional color strength, lightfastness, and washfastness, making it a critical component for achieving durable and vibrant coloration. It is primarily utilized by manufacturers in the textile, leather, and specialty paper industries seeking superior dyeing performance and process reliability.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, silk, and other cellulosic fibers, offering excellent exhaustion and fixation properties.
• Leather Finishing: Used for coloring leather goods, providing rich, uniform shades with good rub fastness.
• Paper Coloration: Employed in the production of high-quality colored papers, including security and decorative papers.
• Ink Formulation: A key pigment for manufacturing inks used in jet printing and specialty packaging.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific affinity.
• Research & Development: Serves as a chemical intermediate or reference standard in synthetic chemistry and material science research.

Basic Information

Product Name	Pyridinium, 1,1'-[1,4-phenylenebis [imino[6-[[8-hydroxy-3,6-disulfo-7-[(2-sulfophenyl)azo]-1-naphthalenyl]amino]-1,3,5-triazine-4,2-diyl]]]bis[3-carboxy-, dihydroxide, hexasodium salt
CAS No.	86422-60-8
Molecular Formula	C~58~H~32~N~14~O~26~S~6~Na~6
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (Hexasodium Salt); C.I. 20505; Remazol Black B; Levafix Black E-B; Sumifix Black B; Dinazol Black BG; Pyrazol Black FGN; 1,4-Phenylenebis[imino[6-[[8-hydroxy-3,6-disulfo-7-[(2-sulfophenyl)azo]-1-naphthalenyl]amino]-1,3,5-triazine-4,2-diyl]]bis[pyridinium-3-carboxylate] hexasodium salt
EINECS	Contact for details

Quality Control

Our production of this reactive dye adheres to stringent quality management systems. Every batch is subjected to comprehensive analytical testing, including spectrophotometric analysis for color strength and chromatographic methods for purity and impurity profiling. A Certificate of Analysis (COA) detailing assay, shade, solubility, and fastness properties is provided with each shipment to ensure consistency and performance for your industrial 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent moisture absorption and caking. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Identification (IR)	Conforms to Standard
Color Strength	≥ 100% (Standard Reference)
Moisture Content	≤ 5.0%
Water Solubility	Clear Solution
pH (1% Solution)	7.0 - 9.0
Shade	Conforms to Standard
Fastness Properties (Light, Wash, Rub)	Grade 4-5 (Typical)

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