Description

4-Amino-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-2,7-Naphthalenedisulfonic Acid is a high-purity, polyfunctional azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple sulfonic acid groups and an azo linkage, makes it a critical precursor for synthesizing specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, colorfast, and high-performance coloring agents.

Application

This versatile azo intermediate is engineered for high-value applications where color performance and chemical stability are paramount.

• Textile Dye Synthesis: A key building block for producing acid dyes and reactive dyes used on nylon, wool, silk, and other protein fibers.
• Inkjet Ink Formulation: Used in the manufacture of high-quality pigments for industrial and graphic arts inks, providing excellent chromaticity and dispersion.
• Specialty Pigment Production: Serves as a precursor for creating complex organic pigments with enhanced lightfastness and thermal stability for plastics and coatings.
• Biological Staining Reagents: Potential use in the synthesis of histological stains and indicators for laboratory diagnostics.
• Chemical Research & Development: Employed as a standard or intermediate in organic synthesis and materials science research.
• Paper Coloring Agents: Used in the development of dyes for high-grade paper and specialty packaging.

Basic Information

Product Name	4-Amino-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-2,7-Naphthalenedisulfonic Acid
CAS No.	24322-63-2
Molecular Formula	C16H11N5O12S3
Molecular Weight	569.48 g/mol
Synonyms	Acid Black 210; C.I. 28440; 2,7-Naphthalenedisulfonic acid, 4-amino-3-[(2-hydroxy-5-nitro-3-sulfophenyl)azo]-; 4-Amino-3-((2-hydroxy-5-nitro-3-sulfophenyl)azo)-2,7-naphthalenedisulfonic acid; 3-[(2-Hydroxy-5-nitro-3-sulfophenyl)azo]-4-amino-2,7-naphthalenedisulfonic acid; 4-Amino-3-(2-hydroxy-5-nitro-3-sulfophenylazo)-2,7-naphthalenedisulfonic acid
EINECS	Contact for details

Quality Control

Our production of 4-Amino-3-[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-2,7-Naphthalenedisulfonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and quality assurance for your manufacturing processes.

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). This compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

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

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