Description

Disodium 7-Amino-4-Hydroxy-8-[(3-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. This compound matters for its role as a key precursor in synthesizing specific, high-performance dyes and pigments, offering excellent chromophore properties. Industries that require precise color formulation, such as textile manufacturing, ink production, and specialty paper coating, rely on this intermediate for consistent quality and performance.

Application

• Primary Intermediate for Azo Dyes: A critical building block in the synthesis of acid dyes and direct dyes for textiles like wool, silk, and nylon.
• Ink Manufacturing: Used in the production of colorants for inks in packaging, printing, and writing applications.
• Paper and Pulp Industry: Employed in the coloration of specialty papers and paper products.
• Leather Dyeing: Serves as an intermediate for dyes used in the leather tanning and finishing industry.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo dye chemistry.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.

Basic Information

Product Name	Disodium 7-Amino-4-Hydroxy-8-[(3-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate
CAS No.	94166-76-4
Molecular Formula	C₁₆H₁₁N₃Na₂O₈S₂
Molecular Weight	499.38 g/mol
Synonyms	7-Amino-4-hydroxy-8-[(3-sulfophenyl)azo]-2-naphthalenesulfonic acid, disodium salt; Acid Orange 156 intermediate; C.I. 24895; Disodium 7-amino-4-hydroxy-8-[(3-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate; 8-[(3-Carboxyphenyl)azo]-7-amino-4-hydroxy-2-naphthalenesulfonic acid disodium salt derivative; Azo dye intermediate 94166-76-4; 3-[(7-Amino-4-hydroxy-2-sulfo-8-naphthyl)azo]benzenesulfonic acid disodium salt
EINECS	Contact for details

Quality Control

Our Disodium 7-Amino-4-Hydroxy-8-[(3-Sulphonatophenyl)Azo]Naphthalene-2-Sulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency meet the agreed specifications. A comprehensive Certificate of Analysis (COA) detailing results for assay, impurity profile, and physical parameters is provided with each shipment to guarantee supply reliability and product integrity for your production processes.

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 after opening to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 30.0%

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