Description

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, coupled with 4-amino-5-hydroxy-2-naphthalenesulfonic acid, diazotized 4-aminobenzenesulfonic acid and diazotized [1,1'-biphenyl]-4,4'-diamine is a complex, high-purity azo dye intermediate synthesized for demanding industrial applications. This compound is engineered to deliver consistent color strength and structural integrity in the production of specialized dyes and pigments. It is a critical raw material for manufacturers in the textile, ink, and specialty coatings industries seeking reliable performance and batch-to-batch consistency.

Application

• Primary intermediate for the synthesis of high-performance azo dyes and pigments.
• Key component in the manufacture of dyes for textile fibers, including nylon, silk, and wool.
• Used in the production of colorants for inks, particularly for packaging and security printing applications.
• Essential for creating specialized pigments used in industrial coatings and plastics.
• Potential use as a reagent or standard in analytical chemistry and quality control laboratories.
• Serves as a building block for research and development of novel functional dyes with specific optical properties.

Basic Information

Item	Details
Product Name	2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, coupled with 4-amino-5-hydroxy-2-naphthalenesulfonic acid, diazotized 4-aminobenzenesulfonic acid and diazotized [1,1'-biphenyl]-4,4'-diamine
CAS No.	90431-98-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Acid Black 210; Acid Black 210; Azo Black 210; 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid, coupled diazo component; [1,1'-Biphenyl]-4,4'-diamine, diazotized, coupled with 4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid and 4-amino-5-hydroxy-2-naphthalenesulfonic acid; Diazotized 4-aminobenzenesulfonic acid coupled product; Textile Black 210 Intermediate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems to ensure purity and performance. Every batch is analyzed using modern techniques like HPLC to verify identity, strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled 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 colored powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture (KF)	Max. 5.0%
Ash Content	Max. 1.0%
Solubility	Soluble in water, alkaline solutions

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