Description

4-Amino-3-[[4'-[(4-Amino-2-Hydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, multi-functional azo dye intermediate of significant industrial importance. Its complex polyazo structure provides excellent 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 chemical sectors seeking to produce vivid, stable colors.

Application

• Primary Intermediate for Textile Dyes: Synthesis of high-grade direct, acid, and reactive dyes for cotton, wool, silk, and nylon.
• Pigment Manufacturing: Key building block for producing organic pigments used in inks, paints, and plastics.
• Specialty Ink Formulation: Used in the production of inks for digital printing, packaging, and security applications.
• Research & Development: Serves as a reference standard and starting material for developing novel chromophores and functional dyes.
• Leather and Paper Coloring: Intermediate for dyes applied in the leather tanning and paper coloring industries.

Basic Information

Product Name	4-Amino-3-[[4'-[(4-Amino-2-Hydroxyphenyl)Azo][1,1'-Biphenyl]-4-Yl]Azo]-5-Hydroxy-6-[(4-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	85750-07-8
Molecular Formula	C40H28N10O13S3 • xNa
Molecular Weight	Contact for details
Synonyms	4-Amino-3-{[4'-(4-amino-2-hydroxyphenyl)diazenyl][1,1'-biphenyl]-4-yl}diazenyl-5-hydroxy-6-(4-sulfophenyl)diazenylnaphthalene-2,7-disulfonic acid sodium salt; Polyazo dye intermediate; CI Direct Black 22 intermediate; Tetrakisazo dye intermediate; Sodium 4-amino-3-({4'-[(4-amino-2-hydroxyphenyl)diazenyl][1,1'-biphenyl]-4-yl}diazenyl)-5-hydroxy-6-[(4-sulfophenyl)diazenyl]naphthalene-2,7-disulfonate
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, assay, and impurity profiles 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, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

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%
Solubility (in Water)	Partially to fully soluble
Heavy Metals (as Pb)	Max. 20 ppm

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