Description

5-Amino-4-Hydroxy-3-[(2-Hydroxy-3-Nitro-5-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple sulphonic 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, stable colors with specific functional properties.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring polyamide fibers like wool, silk, and nylon.
• Specialty Pigment Manufacturing: Used in the production of high-performance pigments for inks, coatings, and plastics that require excellent lightfastness and thermal stability.
• Biological Staining Agent: Potential use as an intermediate for histochemical stains and indicators in laboratory and diagnostic applications.
• Research & Development: Employed in chemical research for developing novel chromophores, sensors, and functional materials due to its distinct photophysical properties.
• Paper Coloring: Can be utilized in the manufacture of dyes for specialty paper products.
• Leather Dyeing: Suitable for the production of dyes used in the leather tanning and finishing industry.

Basic Information

Item	Details
Product Name	5-Amino-4-Hydroxy-3-[(2-Hydroxy-3-Nitro-5-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	93892-26-3
Molecular Formula	C16H9N4Na3O13S3
Molecular Weight	670.42 g/mol
Synonyms	Acid Black 210; C.I. 300310; 5-Amino-4-hydroxy-3-[(2-hydroxy-3-nitro-5-sulfophenyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt; Trisodium 5-amino-4-hydroxy-3-[(2-hydroxy-3-nitro-5-sulfophenyl)azo]naphthalene-2,7-disulfonate; Azo dye intermediate 93892-26-3; 2,7-Naphthalenedisulfonic acid, 5-amino-4-hydroxy-3-[(2-hydroxy-3-nitro-5-sulfophenyl)azo]-, trisodium salt
EINECS	Contact for details

Quality Control

Our production of 5-Amino-4-Hydroxy-3-[(2-Hydroxy-3-Nitro-5-Sulphophenyl)Azo]Naphthalene-2,7-Disulphonic Acid, Sodium Salt adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical composition. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical specifications are provided to guarantee compliance with your technical requirements and support your own 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). This product 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)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Total impurities: Max. 3.0%

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