Description

Trisodium 5-[[4-[(4-Acetamidophenyl)Azo]-7-Sulphonatonaphthyl]Azo]-8-[(2-Hydroxy-6-Sulphonatonaphthyl)Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vivid and durable colorants. Its complex polyazo structure provides exceptional color strength and stability, making it a critical component for manufacturers requiring consistent, high-performance pigments. This compound is primarily utilized by the textile, ink, and specialty coatings industries for applications demanding reliable and intense coloration.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of high-quality pigments for industrial printing inks and toners.
• Specialty Coatings: Imparts color and stability in coatings for plastics, leather, and paper products.
• Research & Development: Serves as a reference standard and building block for developing novel colorants and functional dyes.
• Analytical Reagents: Can be employed as a colorimetric indicator or tracer in specific laboratory analyses.

Basic Information

Product Name	Trisodium 5-[[4-[(4-Acetamidophenyl)Azo]-7-Sulphonatonaphthyl]Azo]-8-[(2-Hydroxy-6-Sulphonatonaphthyl)Azo]Naphthalene-2-Sulphonate
CAS No.	67906-45-0
Molecular Formula	C44H26N7Na3O13S3
Molecular Weight	Approx. 1025.85 g/mol
Synonyms	5-[[4-[(4-Acetamidophenyl)azo]-7-sulphonato-1-naphthyl]azo]-8-[(2-hydroxy-6-sulphonato-1-naphthyl)azo]naphthalene-2-sulphonate, trisodium salt; C.I. Direct Brown 1:2; Polyazo Brown Dye Intermediate; Trisodium 5,8-bis(azo)naphthalene disulphonate derivative; Azo Dye Intermediate 67906-45-0; Direct Brown Dye Precursor
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Every lot is tested against stringent in-house specifications, which typically include parameters for assay (HPLC), identity (IR), moisture content, and heavy metal limits. A comprehensive Certificate of Analysis (COA) is provided with each shipment to guarantee compliance with your technical requirements.

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 to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	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.