Description

3,5-Diamino-2-[(1,5-Disulfo-2-Naphthalenyl)Azo]-4,6-Bis[[4-(Ethenyl Sulfonyl)Phenyl]Azo]-Benzoic Acid Sodium Salt is a high-purity, polyfunctional reactive dye intermediate designed for demanding industrial applications. Its complex molecular structure, featuring multiple azo linkages and reactive vinyl sulfone groups, provides exceptional color strength and covalent bonding capability to substrates. This compound is essential for manufacturers requiring advanced, wash-fast, and light-fast dyes and pigments for textiles, inks, and specialty coatings.

Application

This specialized reactive dye intermediate is engineered for high-performance applications where durability and color integrity are paramount. Its primary and related uses include:

• Reactive Dye Synthesis: A key precursor for manufacturing high-grade reactive dyes used in cotton, wool, and nylon dyeing and printing.
• Textile Industry: Production of dyes offering excellent wash-fastness, light-fastness, and brilliant shades for the fashion and technical textile sectors.
• Ink Formulation: Used in the creation of high-performance inks for digital textile printing and other specialty printing applications.
• Leather Coloring: Employed in the synthesis of dyes for high-quality leather finishing.
• Paper Coloring: Suitable for producing dyes used in specialty paper and packaging.
• Research & Development: Serves as a critical building block in R&D for novel chromophores and functional dyes in academic and industrial laboratories.

Basic Information

Product Name	3,5-Diamino-2-[(1,5-Disulfo-2-Naphthalenyl)Azo]-4,6-Bis[[4-(Ethenyl Sulfonyl)Phenyl]Azo]-Benzoic Acid Sodium Salt
CAS No.	247061-21-8
Molecular Formula	C43H28N10O14S4Na2 (Contact for exact confirmation)
Molecular Weight	~1086 g/mol (Contact for exact confirmation)
Synonyms	Reactive Black 5 Intermediate; Polyazo Reactive Dye Intermediate; Sodium 3,5-diamino-2-[(1,5-disulfo-2-naphthyl)azo]-4,6-bis[[4-(ethenylsulfonyl)phenyl]azo]benzoate; Vinylsulfone Azo Dye Intermediate; C.I. Reactive Black 5 precursor; Tetrasulfonated Bisazo Dye Salt; Reactive Dye Intermediate 247061-21-8
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 high chemical purity. Quality is verified through advanced analytical techniques including HPLC, spectrophotometry, and titration methods. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided with each shipment to support your quality assurance and regulatory compliance 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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance and stability.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content (KF)	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Individual impurity: Max. 1.0% Total impurities: Max. 5.0%

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