Description

7-Amino-4-Hydroxy-3-(Phenylazo)Naphthalene-2-Sulphonic Acid is a specialized azo dye intermediate and a key building block in the synthesis of high-value colorants. This compound matters for its ability to impart specific, stable hues and functional properties to advanced materials. It is primarily needed by manufacturers in the dye and pigment industry, as well as by research institutions developing novel optical or sensor materials.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a crucial precursor in the synthesis of acid dyes, direct dyes, and solvent dyes, contributing to color strength and fastness properties.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers like wool, silk, and nylon.
• Functional Dye Synthesis: A key starting material for creating dyes used in non-textile applications, including inks, toners, and specialty coatings.
• Research & Development: Employed in academic and industrial R&D labs for developing new chromophores, photoactive compounds, and chemical sensors.
• Analytical Chemistry: Can be utilized as a reagent or standard in analytical methods due to its distinct chromophoric structure.

Basic Information

Product Name	7-Amino-4-Hydroxy-3-(Phenylazo)Naphthalene-2-Sulphonic Acid
CAS No.	83006-40-0
Molecular Formula	C₁₆H₁₃N₃O₄S
Molecular Weight	343.36 g/mol
Synonyms	7-Amino-4-hydroxy-3-(phenylazo)naphthalene-2-sulfonic acid; 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-(phenylazo)-; 3-(Phenylazo)-7-amino-4-hydroxy-2-naphthalenesulfonic acid; Azo dye intermediate; Acid Black 210 intermediate; C.I. 20470 intermediate; 7-Amino-4-hydroxy-3-(phenyldiazenyl)naphthalene-2-sulfonic acid
EINECS	Contact for details

Quality Control

Our 7-Amino-4-Hydroxy-3-(Phenylazo)Naphthalene-2-Sulphonic Acid is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. Certificates of Analysis (COA) detailing key specifications are available upon request to support your quality assurance and regulatory needs.

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 and sources of ignition.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
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.