Description

1,4-Benzenedisulfonic acid, 2,2-1,2-ethenediylbis(3-sulfo-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)iminobis5-4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-ylazo-, octasodium salt is a high-performance, water-soluble reactive dye intermediate and functional colorant. Its complex polyazo structure, featuring triazine and pyrazole rings, provides exceptional chromophore strength and binding affinity, making it a critical component for creating vivid and durable colors. This compound is essential for manufacturers in the textile, specialty ink, and high-grade paper industries seeking superior color fastness and chemical stability in their products.

Application

• Reactive Dye Synthesis: A key intermediate for producing high-quality reactive dyes for cotton, viscose, and other cellulosic fibers, offering excellent wash and light fastness.
• Textile Printing Inks: Used in the formulation of inks for digital and screen printing on textiles, providing brilliant shades and strong substrate adhesion.
• Specialty Paper Dyeing: Employed in the coloring of high-value papers, including security papers and decorative papers, where color consistency and stability are paramount.
• Functional Colorants: Serves as a precursor for colorants used in biological stains, indicators, and other laboratory reagents requiring specific optical properties.
• Leather Finishing: Applied in the dyeing and finishing processes for leather goods to achieve deep, uniform colors with good rub fastness.
• Research & Development: Utilized in chemical R&D for synthesizing novel polymeric dyes and studying structure-property relationships in color chemistry.

Basic Information

Item	Details
Product Name	1,4-Benzenedisulfonic acid, 2,2-1,2-ethenediylbis(3-sulfo-4,1-phenylene)imino(6-chloro-1,3,5-triazine-4,2-diyl)iminobis5-4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-ylazo-, octasodium salt
CAS No.	59917-88-3
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5; Reactive Black 5; Octasodium 4-amino-5-hydroxy-3,6-bis((4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)naphthalene-2,7-disulfonate (related structure); Remazol Black B; Sumifix Black B; Levafix Black EB; Drimarene Black B; Polyazo reactive dye intermediate; Tetrasulfonated azo dye
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 reliability. Quality is verified through advanced analytical techniques including HPLC for purity and spectrophotometry for color strength assessment. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, solubility, and color value are provided with every shipment. We operate under a ISO 9001-certified quality management system, ensuring traceability and compliance with global industry standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled 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. Store away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	Max. 20 ppm
Ash Content	Contact for details

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