Description

Tetrasodium 4-amino-5-hydroxy-6-[[2-methoxy-5-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]-3-[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its value lies in its role as a key precursor for synthesizing reactive and direct dyes that offer excellent wash and light fastness properties. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce vibrant, durable colors.

Application

• Primary Intermediate for Reactive Dyes: A critical building block in the synthesis of high-performance reactive dyes for cotton, viscose, and other cellulosic fibers.
• Direct Dye Production: Used in the manufacture of direct dyes for paper coloring and textile applications requiring deep, substantive shades.
• Leather Dyeing: Serves as an intermediate for dyes used in the leather tanning and finishing industry to achieve consistent and rich coloration.
• Specialty Ink Formulation: Employed in the production of pigments and dyes for inks used in packaging, security printing, and other niche applications.
• Research & Development: Utilized in chemical R&D labs for developing novel chromophores and studying dye-polymer interactions.

Basic Information

Product Name	Tetrasodium 4-amino-5-hydroxy-6-[[2-methoxy-5-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]-3-[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonate
CAS No.	93951-21-4
Molecular Formula	C35H28N6Na4O22S6
Molecular Weight	~1224.0 g/mol (Contact for exact details)
Synonyms	Tetrasodium 6-[(5-((2-sulfatoethyl)sulfonyl)-2-methoxyphenyl)azo]-5-amino-4-hydroxy-3-[(4-((2-sulfatoethyl)sulfonyl)phenyl)azo]naphthalene-2,7-disulfonate; Reactive Dye Intermediate; Azo Dye Intermediate; C.I. Reactive Black 5 precursor; Tetrasodium Salt of a Bis(vinylsulfone) Azo Dye; 93951-21-4; CAS 93951-21-4
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 purity for optimal downstream performance. Every lot is analyzed using advanced techniques like HPLC to verify critical parameters. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

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 (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product stability and handling properties.

Specification

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

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