Description

7-Amino-4-Hydroxy-3-[[3-Methyl-4-[(4-Sulphophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonic Acid is a high-purity, synthetic azo dye intermediate essential for producing vibrant and stable colorants. Its value lies in its precise molecular structure, which serves as a key building block for creating specialized dyes with excellent light and wash fastness properties. This compound is critically needed by manufacturers in the textile, leather, ink, and specialty chemical industries seeking reliable intermediates for high-performance dye synthesis. Consistent quality and supply chain reliability are paramount for industrial-scale production processes.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial precursor in the synthesis of acid dyes and direct dyes, particularly for coloring polyamide fibers like nylon and wool.
• Textile Industry: Used in the production of dyes for fabrics requiring high color strength and good fastness to light and washing.
• Leather Processing: Employed in the formulation of dyes for leather goods, providing deep, uniform coloration.
• Ink Manufacturing: Acts as a colorant intermediate in the production of inks for various printing applications.
• Paper Coloring: Utilized in the manufacture of dyes for specialty paper products.
• Research & Development: Serves as a standard or starting material in chemical R&D for developing new dye molecules and studying azo chemistry.

Basic Information

Item	Details
Product Name	7-Amino-4-Hydroxy-3-[[3-Methyl-4-[(4-Sulphophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonic Acid
CAS No.	36867-70-6
Molecular Formula	C23H18N5O7S2
Molecular Weight	540.55 g/mol
Synonyms	Acid Black 210; C.I. 300310; 7-Amino-4-hydroxy-3-((3-methyl-4-((4-sulfophenyl)azo)phenyl)azo)naphthalene-2-sulfonic acid; 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-((3-methyl-4-((4-sulfophenyl)azo)phenyl)azo)-; Azo dye intermediate for Acid Black 210; CAS 36867-70-6; 3-[[3-Methyl-4-[(4-sulfophenyl)azo]phenyl]azo]-7-amino-4-hydroxy-2-naphthalenesulfonic acid
EINECS	Contact for details

Quality Control

Our production of 7-Amino-4-Hydroxy-3-[[3-Methyl-4-[(4-Sulphophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity, consistent chemical structure, and compliance with industry specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to guarantee traceability and support your quality assurance processes.

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). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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