Description

7-[[4-[(6-Amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]benzoyl]amino]-4-hydroxy-3-[[4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]-2-naphthalenesulfonic acid trisodium salt is a high-purity, polyazo dye intermediate known for its complex molecular structure and excellent chromophoric properties. This compound is critical for synthesizing high-performance dyes and pigments with superior color strength and fastness. It is primarily needed by manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, durable colors.

Application

• Textile Dyeing: A key intermediate for producing high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Ink Manufacturing: Used in the synthesis of pigments for industrial printing inks, including packaging and security inks.
• Specialty Coatings: Serves as a precursor for colorants in paints, lacquers, and polymer coatings requiring high stability.
• Leather Coloring: Employed in the production of dyes for the leather tanning and finishing industry.
• Paper Coloring: Used in the manufacture of dyes for high-quality paper and board products.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel dye chemistry and material science.

Basic Information

Item	Detail
Product Name	7-[[4-[(6-Amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]benzoyl]amino]-4-hydroxy-3-[[4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]-2-naphthalenesulfonic acid trisodium salt
CAS No.	71033-09-5
Molecular Formula	C43H26N7Na3O13S3
Molecular Weight	Contact for details
Synonyms	Trisodium 7-[[4-[(6-amino-1-hydroxy-3-sulfo-2-naphthyl)azo]benzoyl]amino]-4-hydroxy-3-[[4-[(3-sulfophenyl)azo]-1-naphthyl]azo]-2-naphthalenesulfonate; C.I. Direct Brown 1:1; Direct Brown 1:1; Polyazo dye intermediate; Azo dye precursor; Direct Brown 1 (sodium salt); 71033-09-5 (CAS); Light-sensitive azo compound
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance needs.

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 light-sensitive (store away from light) and hygroscopic (moisture-sensitive). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Ash Content	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in water)	Partially soluble

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