Description

2,7-Naphthalenedisulfonic acid, 4-amino-6-5-(4-amino-6-chloro-1,3,5-triazin-2-yl)amino-2-sulfo-4-4-2-(sulfooxy)ethylsulfonylphenylazophenylazo-5-hydroxy-3-4-2-(sulfooxy)ethylsulfonylphenylazo-, sodium salt is a high-purity, reactive dye intermediate of significant commercial importance. Its complex polyazo and triazine-based structure provides excellent chromophore properties and reactivity for covalent bonding to substrates. This compound is essential for manufacturers requiring high-performance, wash-fast, and light-fast dyes for demanding technical applications. Its primary utility lies in the synthesis of specialized dyes and pigments for the textile and advanced materials sectors.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-grade reactive dyes used in cotton, wool, and nylon dyeing and printing.
• Textile Industry: Production of dyes offering superior color strength, excellent wet fastness, and good light stability for technical textiles.
• Specialty Pigments: Used in the synthesis of complex organic pigments for inks, coatings, and plastics where high durability is required.
• Research & Development: Serves as a building block in chemical research for developing new chromophores and functional dyes.
• Leather Dyeing: Potential application in the production of dyes for leather finishing, providing deep, penetrating colors.
• Paper Coloring: Can be utilized in the manufacture of dyes for high-quality paper and specialty board products.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 4-amino-6-5-(4-amino-6-chloro-1,3,5-triazin-2-yl)amino-2-sulfo-4-4-2-(sulfooxy)ethylsulfonylphenylazophenylazo-5-hydroxy-3-4-2-(sulfooxy)ethylsulfonylphenylazo-, sodium salt
CAS No.	157707-93-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5 (key intermediate derivative); Polyazo reactive dye intermediate; Sodium 4-amino-6-[5-[4-amino-6-chloro-1,3,5-triazin-2-yl)amino]-2-sulfo-4-[4-[2-(sulfooxy)ethylsulfonyl]phenylazo]phenylazo]-5-hydroxy-3-[4-[2-(sulfooxy)ethylsulfonyl]phenylazo]-2,7-naphthalenedisulfonate; Reactive Black 5 precursor; Tetrasulfonated azo dye intermediate; Triazine-containing disazo dye intermediate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and performance in downstream synthesis. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are provided with each shipment. We are committed to meeting the precise specifications required for high-value reactive dye manufacturing.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect reactivity and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (HPLC/IR)	Conforms to reference standard
Assay (HPLC)	≥ 90% (or as per customer grade requirement)
Moisture Content (KF)	≤ 5.0%
Water Solubility	Freely soluble in water
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 2.0%; Total impurities ≤ 8.0%

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