Description

Pyridinium, 1,1'-[1,2-ethenediylbis[(3-sulfo-4,1-phenylene) imino [6-[[3-(acetylamino)-4-[(4,8-disulfo-2-naphthalenyl)azo]phenyl]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 class of reactive or direct azo dyes with a complex polyfunctional structure. This compound is engineered to deliver exceptional color strength, lightfastness, and substantivity to cellulosic and protein-based fibers. It is a critical specialty chemical for industries requiring vibrant and durable coloration, particularly in textile manufacturing, paper coloring, and advanced material research.

Application

• Textile Dyeing: Primary application for dyeing cotton, wool, silk, and nylon, offering excellent wash and light fastness.
• Paper Coloring: Used in the production of high-quality colored papers, including specialty packaging and decorative papers.
• Leather Finishing: Imparts deep, uniform color to leather goods in the tanning industry.
• Ink Formulation: A key component in the manufacture of inks for jet printing and other specialty printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific affinity.
• Research & Development: Serves as a standard or intermediate in the synthesis of novel dyes and functional materials.

Basic Information

Product Name	Pyridinium, 1,1'-[1,2-ethenediylbis[(3-sulfo-4,1-phenylene) imino [6-[[3-(acetylamino)-4-[(4,8-disulfo-2-naphthalenyl)azo]phenyl]amino]-1,3,5-triazine-4,2-diyl]]]bis[3-carboxy-, dihydroxide, hexasodium salt
CAS No.	86422-61-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5 (Hexasodium Salt); Reactive Black 5; Remazol Black B; Levafix Black E-B; Sumifix Black B; Dinazol Black BG; Polyazo Black Dye; 1,1'-[1,2-Ethenediylbis[(3-sulfo-4,1-phenylene)imino[6-[[3-(acetylamino)-4-[(4,8-disulfo-2-naphthalenyl)azo]phenyl]amino]-1,3,5-triazine-4,2-diyl]]]bis[3-carboxypyridinium] dihydroxide hexasodium salt
EINECS	Contact for details

Quality Control

Our production of this dye adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Every lot is analyzed for critical parameters including color strength, hue, solubility, and impurity profile. Certificates of Analysis (COA) documenting purity, physical properties, and conformance to agreed specifications are available upon request. We support compliance with relevant global standards for industrial dyes.

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 hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Color Strength	100% ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	7.0 - 9.0
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.