Description

2,7-Naphthalenedisulfonic acid, 4-amino-6-[[5-[[4-chloro-6-[(3-chloro-4-methylphenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-5-hydroxy-3-[[2-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, tetrasodium salt is a high-performance, polyfunctional azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple sulfonic acid groups and reactive triazine and azo linkages, provides exceptional binding affinity and chromogenic properties. This compound is primarily sought by manufacturers in the textile, leather, and specialty ink industries for synthesizing advanced, wash-fast reactive dyes and pigments.

Application

• Reactive Dye Synthesis: A key intermediate for producing high-quality reactive dyes used in cotton, wool, and nylon fiber dyeing and printing.
• Leather Coloring: Used in the formulation of durable and vibrant dyes for the leather tanning and finishing industry.
• Ink Manufacturing: Serves as a critical component in the production of specialty inks, including those for ink-jet and packaging applications.
• Paper Dyeing: Employed in the manufacture of dyes for coloring paper and paperboard products.
• Research & Development: Utilized in chemical R&D for developing new chromophores and functional dyes with specific light-fastness and solubility properties.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 4-amino-6-[[5-[[4-chloro-6-[(3-chloro-4-methylphenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-5-hydroxy-3-[[2-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, tetrasodium salt
CAS No.	80294-29-7
Molecular Formula	C40H28Cl2N10O18S6Na4
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (Tetrasodium Salt); C.I. 20505; Remazol Black B; Tetrasodium 4-amino-5-hydroxy-3-[[2-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-6-[[5-[[4-chloro-6-[(3-chloro-4-methylphenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-2,7-naphthalenedisulfonate; Levafix Black EB; Sumifix Black B; Dianix Black BG-FS
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance reliability for downstream synthesis. Quality is verified through advanced analytical techniques including HPLC for purity and spectrophotometry for strength assessment. A comprehensive Certificate of Analysis (COA) detailing identity, purity, impurity profile, and physical specifications is provided with each shipment to support your quality assurance systems.

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 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 granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	7.0 - 9.0

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