Description

5-Amino-3-[[4-[[4-[[4-Anilino-2-Hydroxyphenyl]Azo]Phenyl]Amino]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. It serves as a critical precursor for synthesizing high-performance dyes and pigments, valued for its ability to impart strong, stable color and specific functional properties. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to develop advanced colorants with excellent fastness and application performance.

Application

• Primary Intermediate for Azo Dyes: Key building block for the synthesis of acid dyes, direct dyes, and reactive dyes used in textile coloring.
• Specialty Pigment Production: Used in the manufacture of high-grade pigments for inks, coatings, and plastics requiring specific hue and stability.
• Functional Dye Synthesis: Serves as a precursor for dyes used in biological staining, laser applications, or as sensitizers in photodynamic therapy research.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Product Name	5-Amino-3-[[4-[[4-[[4-Anilino-2-Hydroxyphenyl]Azo]Phenyl]Amino]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	83232-39-7
Molecular Formula	C40H28N8O8S2•xNa
Molecular Weight	Contact for details
Synonyms	Acid Black 210; C.I. 300310; 5-Amino-4-hydroxy-3-[[4-[[4-[(2-hydroxy-4-aminophenyl)azo]phenyl]amino]phenyl]azo]naphthalene-2,7-disulfonic acid sodium salt; Sodium 5-amino-3-[[4-[[4-[[4-(2-hydroxyanilino)phenyl]azo]phenyl]amino]phenyl]azo]-4-hydroxynaphthalene-2,7-disulfonate; Azo dye intermediate 83232-39-7
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 high purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

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 stability and performance.

Specification

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