Description

Tetrasodium 5-Amino-3-[[4-[[4-[(8-Amino-1-Hydroxy-3,6-Disulphonato-2-Naphthyl)Azo]-3-Methoxyphenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, water-soluble polyazo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulfonate groups, provides exceptional chromophoric properties and solubility, making it a critical precursor for high-performance dyes. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, stable, and wash-fast colors.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing and printing.
• Direct Dye Production: Used in the manufacture of direct dyes for paper, leather, and textile applications requiring good substantivity.
• Specialty Ink Formulations: A crucial component in producing pigments and dyes for inks in packaging, security printing, and digital textiles.
• Functional Dyes for Non-Textile Uses: Serves as a precursor for dyes used in biological staining, laser applications, and as functional colorants in polymers.
• Research & Development: Used in academic and industrial R&D for developing novel chromophores and studying azo dye chemistry and properties.

Basic Information

Item	Detail
Product Name	Tetrasodium 5-Amino-3-[[4-[[4-[(8-Amino-1-Hydroxy-3,6-Disulphonato-2-Naphthyl)Azo]-3-Methoxyphenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	72017-91-5
Molecular Formula	C43H28N8Na4O18S4
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Black 5 (Tetrasodium Salt); Reactive Black 5; Remazol Black B; Tetrasodium 8-[[4-[[4-[(2,4-Diamino-5-sulphonatophenyl)azo]-3-methoxyphenyl]azo]phenyl]azo]-7-hydroxynaphthalene-1,3-disulphonate; Tetrasodium 4-Amino-5-hydroxy-6-[[4-[[4-[(2,4-diamino-5-sulfophenyl)azo]-3-methoxyphenyl]azo]phenyl]azo]naphthalene-2,7-disulfonate; C.I. 20505; Levafix Black EB
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 5-Amino-3-[[4-[[4-[(8-Amino-1-Hydroxy-3,6-Disulphonato-2-Naphthyl)Azo]-3-Methoxyphenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate adheres to stringent quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and batch-to-batch reliability for your synthesis processes. A detailed Certificate of Analysis (COA) specifying purity, dye content, and impurity profile 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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect handling and performance properties.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	Min. 95% (Dye Content)
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	7.0 - 9.0
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.