Description

7-Amino-(4-Aminophenyl)-4-Hydroxynaphthalene-2-Sulphonic Acid is a high-purity, multi-functional aromatic amine sulfonic acid derivative, serving as a critical advanced intermediate in the synthesis of complex organic molecules. Its value lies in its unique bifunctional structure, which provides two distinct reactive amino groups and a sulfonic acid moiety, enabling precise molecular construction for high-performance applications. This compound is essential for manufacturers in the dyes and pigments, pharmaceutical, and specialty chemical industries seeking to develop products with enhanced color fastness, bioactivity, or specific material properties.

Application

• Primary Intermediate for High-Performance Dyes and Pigments: A key building block in the synthesis of azo dyes, acid dyes, and reactive dyes, particularly for textiles requiring excellent wash and light fastness.
• Pharmaceutical Intermediate: Used in the research and development of active pharmaceutical ingredients (APIs), especially those with naphthalene-based structures.
• Specialty Chemical Synthesis: Serves as a precursor for optical brighteners, liquid crystal materials, and other functional organic compounds.
• Research & Development: Employed in academic and industrial R&D labs for exploring new organic reactions and creating novel molecular architectures.
• Corrosion Inhibitor Formulation: Potential use as a component in advanced formulations for metal surface treatment and protection.

Basic Information

Product Name	7-Amino-(4-Aminophenyl)-4-Hydroxynaphthalene-2-Sulphonic Acid
CAS No.	71412-07-2
Molecular Formula	C₁₆H₁₄N₂O₄S
Molecular Weight	330.36 g/mol
Synonyms	7-Amino-4-hydroxy-2-naphthalenesulfonic acid, 4-[(4-aminophenyl)amino] derivative; 4-Amino-1-(4-aminophenyl)amino-2-naphthol-7-sulfonic acid; 1,4-Diamino-2-naphthol-7-sulfonic acid, N-phenyl derivative; 7-Amino-4-[(4-aminophenyl)amino]-2-naphthalenesulfonic acid; 4-Hydroxy-7-amino-2-naphthalenesulfonic acid anilide; Azoic diazo component intermediate; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our production of 7-Amino-(4-Aminophenyl)-4-Hydroxynaphthalene-2-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are provided as standard, ensuring full traceability and compliance with your internal quality standards and regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Light brown to gray powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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