Description

Tetrasodium 5-Amino-3-[[4-[[4-[(8-Amino-1-Hydroxy-3,6-Disulphonato-2-Naphthyl)Azo]-5-Methoxy-o-Tolyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, polyazo dye intermediate of significant industrial importance. Its complex molecular structure provides exceptional chromophoric properties, making it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, stable colors with excellent fastness properties.

Application

• Primary Intermediate for Reactive Dyes: Key building block for manufacturing high-quality reactive dyes used in cotton and cellulose fiber dyeing.
• Textile Industry: Production of dyes offering excellent wash, light, and rub fastness for textiles and apparel.
• Ink Manufacturing: Synthesis of pigments and dyes for industrial inks, including packaging and security inks.
• Specialty Coatings: Used in the production of colorants for paints, lacquers, and other coating systems requiring high stability.
• Leather Dyeing: Intermediate for dyes applied in the leather tanning and finishing industry.
• Paper Coloring: Precursor for dyes used in the coloring of specialty papers and paper products.
• Research & Development: Serves as a standard or starting material in chemical R&D for novel chromophore synthesis.

Basic Information

Product Name	Tetrasodium 5-Amino-3-[[4-[[4-[(8-Amino-1-Hydroxy-3,6-Disulphonato-2-Naphthyl)Azo]-5-Methoxy-o-Tolyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	72245-59-1
Molecular Formula	C40H24N8Na4O18S4
Molecular Weight	1088.88 g/mol (approx.)
Synonyms	5-Amino-3-[[4-[[4-[(8-amino-1-hydroxy-3,6-disulfo-2-naphthyl)azo]-5-methoxy-2-methylphenyl]azo]phenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonic acid, tetrasodium salt; C.I. Reactive Black 5 intermediate; Polyazo dye intermediate; Tetrasodium 4-amino-6-[[4-[[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthyl)azo]-2-methoxy-5-methylphenyl]azo]phenyl]azo]-5-hydroxy-2,7-naphthalenedisulfonate (related isomer); Reactive Dye Intermediate; Azo Dye Precursor
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for your synthesis processes. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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