Description

7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt is a high-purity, polyazo dye intermediate of significant industrial importance. This compound is valued for its complex molecular structure, which serves as a critical precursor in the synthesis of high-performance dyes and pigments. It is primarily sought by manufacturers in the textile, leather, and specialty chemical industries for producing deep, vibrant, and colorfast shades.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the manufacture of high-grade reactive dyes for cotton and other cellulosic fibers.
• Production of Direct Dyes: Used in synthesizing direct dyes for paper, leather, and textile applications requiring good wet fastness.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in inks, coatings, and plastics.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying azo dye chemistry.
• Functional Dye Manufacturing: Potential use in the production of dyes for non-textile applications, such as in optical or laser technologies.

Basic Information

Item	Details
Product Name	7-Amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sodiosulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-8-[(4-amino-2-sodiosulfophenyl)azo]-4-hydroxynaphthalene-2-sulfonic acid sodium salt
CAS No.	6661-39-8
Molecular Formula	C46H32N12Na2O11S3
Molecular Weight	1083.0 g/mol (approx.)
Synonyms	Direct Black 22 (Intermediate); C.I. 35435; Sodium 7-amino-3-[[4'-[[6-amino-5-[(4-aminophenyl)azo]-1-hydroxy-3-sulfo-2-naphthyl]azo]biphenyl-4-yl]azo]-8-[(4-amino-2-sulfophenyl)azo]-4-hydroxy-2-naphthalenesulfonate; Reactive Black 5 related intermediate; Polyazo dye intermediate; Tetrakisazo compound; 7-Amino-4-hydroxy-3,8-bis[[4'-[(6-amino-1-hydroxy-3-sulfo-2-naphthyl)azo][1,1'-biphenyl]-4-yl]azo]-2-naphthalenesulfonic acid disodium salt (related isomer)
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high chemical purity. Quality is verified through analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory 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)	≥ 95.0% (Area Percent)
Moisture Content	≤ 5.0% (Karl Fischer)
Solubility (in Water)	Partially soluble to 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.