Description

Trisodium 7-[(4-Aminobenzoyl)Amino]-4-[[2,5-Dimethoxy-4-[[7-Sulphonato-4-[(3-Sulphonatophenyl)Azo]Naphthyl]Azo]Phenyl]Azo]-3-Hydroxynaphthalene-1-Sulphonate is a high-purity, water-soluble polyazo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple azo linkages and sulphonate groups, provides excellent 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 vibrant, stable colors with specific technical characteristics.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for cotton, wool, and nylon fibers, offering excellent wash and light fastness.
• Production of Acid Dyes: Used in manufacturing acid dyes for silk, polyamide, and leather, providing bright and intense shades.
• Specialty Ink Formulations: Serves as a crucial component in producing pigments for high-quality inks used in packaging, security printing, and digital textiles.
• Functional Dyes for Non-Textile Uses: Applied in the development of dyes for paper, food colorants (where approved), and biological stains, leveraging its strong color value and solubility.
• Research & Development: Utilized in chemical R&D for creating novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Product Name	Trisodium 7-[(4-Aminobenzoyl)Amino]-4-[[2,5-Dimethoxy-4-[[7-Sulphonato-4-[(3-Sulphonatophenyl)Azo]Naphthyl]Azo]Phenyl]Azo]-3-Hydroxynaphthalene-1-Sulphonate
CAS No.	68214-03-9
Molecular Formula	C41H27N7Na3O14S3
Molecular Weight	1030.84 g/mol
Synonyms	Reactive Black 5 Precursor; Polyazo Dye Intermediate; Trisodium 4-Amino-5-hydroxy-3-[[4-[[2-methoxy-5-[[2-(3-sulfophenyl)diazenyl]-7-sulfo-1-naphthalenyl]diazenyl]-2-methoxyphenyl]diazenyl]-6-[(4-aminobenzoyl)amino]-2,7-naphthalenedisulfonate; C.I. Reactive Black 5 Intermediate; Azo Dye Intermediate 68214-03-9; 1,3,6-Naphthalenetrisulfonic acid, 7-[(4-aminobenzoyl)amino]-4-[[2,5-dimethoxy-4-[[7-sulfo-4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]phenyl]azo]-3-hydroxy-, trisodium salt
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet the precise specifications required for downstream synthesis. Certificates of Analysis (COA) detailing batch-specific results are provided and can be tailored to support compliance with relevant industry and regulatory standards.

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 moisture-sensitive (hygroscopic); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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