Description

Tetrasodium 5-(Benzoylamino)-3-[[4-[[4-(Benzoylamino)-2-Sulphonatophenyl]Azo]-2-Ethoxy-6-Sulphonato-1-Naphthyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure with multiple sulphonate groups provides excellent substantivity and chromophoric properties, making it a critical precursor for high-performance dyes. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce vibrant, wash-fast, and light-fast colorants.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-grade reactive dyes used in cotton, wool, and nylon dyeing and printing.
• Direct Dye Production: Used in the manufacture of direct dyes for paper, leather, and cellulosic fibers, offering good solubility and color yield.
• Specialty Ink Formulations: Serves as a colorant precursor in the production of inks for jet printing, security inks, and other high-value applications.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel dye structures, photochemical properties, and material science.
• Functional Dye Synthesis: Intermediate for creating dyes with specific functional properties for optical data storage, liquid crystal displays (LCDs), or sensors.

Basic Information

Product Name	Tetrasodium 5-(Benzoylamino)-3-[[4-[[4-(Benzoylamino)-2-Sulphonatophenyl]Azo]-2-Ethoxy-6-Sulphonato-1-Naphthyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	72749-84-9
Molecular Formula	C49H32N6Na4O19S4
Molecular Weight	~1250.0 g/mol (Contact for exact details)
Synonyms	5-(Benzoylamino)-3-[[4-[[4-(Benzoylamino)-2-sulphonatophenyl]azo]-2-ethoxy-6-sulphonato-1-naphthyl]azo]-4-hydroxynaphthalene-2,7-disulphonic acid, tetrasodium salt; CI Direct Blue 218 (related class); Tetrasodium 5-Benzamido-3-[[4-[(4-benzamido-2-sulfophenyl)azo]-2-ethoxy-6-sulfo-1-naphthyl]azo]-4-hydroxy-2,7-naphthalenedisulfonate; Azo dye intermediate 72749-84-9; Polyazo disulphonate dye intermediate; Reactive Blue 218 precursor
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 5-(Benzoylamino)-3-[[4-[[4-(Benzoylamino)-2-Sulphonatophenyl]Azo]-2-Ethoxy-6-Sulphonato-1-Naphthyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and batch-to-batch reliability for your synthesis processes. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment.

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); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which may affect stability and handling properties.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content (KF)	Max. 5.0%
Sulphated Ash	Contact for details
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	< 20 ppm

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