Description

4-Amino-3-[(4-Aminophenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid is a high-purity, specialized azo dye intermediate essential for synthesizing vibrant and colorfast dyes and pigments. Its molecular structure, featuring dual amino and sulphonic acid groups, provides excellent water solubility and strong affinity for various substrates, making it a critical building block for advanced colorants. This compound is primarily sought by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance dyes.

Application

• Primary Intermediate for Azo Dyes: Serves as a key precursor in the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring wool, silk, nylon, and paper.
• Textile Industry: Used to manufacture dyes that offer excellent brightness, wash-fastness, and light-fastness on natural and synthetic fibers.
• Ink Formulation: Employed in the production of pigments for inks used in packaging, printing, and writing instruments.
• Leather Dyeing: Acts as an intermediate for dyes applied in the leather tanning and finishing process.
• Research & Development: Utilized in chemical research for developing novel chromophores and studying azo coupling reactions.
• Specialty Chemicals: Functions as a building block for more complex chemical entities in agrochemical and pharmaceutical research.

Basic Information

Product Name	4-Amino-3-[(4-Aminophenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	85204-15-5
Molecular Formula	C16H15N5O7S2
Molecular Weight	453.45 g/mol
Synonyms	Acid Black 234 Intermediate; 2,7-Naphthalenedisulfonic acid, 4-amino-3-[(4-aminophenyl)azo]-5-hydroxy-; 5-Hydroxy-4-amino-3-[(4-aminophenyl)azo]naphthalene-2,7-disulfonic acid; C.I. 31727; Azoic Diazo Component 48; 4-Amino-5-hydroxy-3-[(4-aminophenyl)azo]naphthalene-2,7-disulphonic acid
EINECS	Contact for details

Quality Control

Our 4-Amino-3-[(4-Aminophenyl)Azo]-5-Hydroxynaphthalene-2,7-Disulphonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and consistent performance in downstream synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment.

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 heat, sparks, and open flame. 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.