Description

7-Amino-4-Hydroxy-3-[[2-Methoxy-4-[(3-Sulphophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate essential for producing vivid and stable colorants. Its value lies in its precise molecular structure, which enables the synthesis of specialized dyes with excellent light and wash fastness properties. This compound is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking reliable intermediates for high-performance dye and pigment production.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile coloring.
• Key component in manufacturing reactive dyes for cotton and other cellulosic fibers.
• Used in the production of inkjet inks and specialty printing inks requiring high color strength.
• Intermediate for paper coloring agents and coatings.
• Starting material for research and development of novel functional dyes and colorants.
• Potential use in the synthesis of biological stains and analytical reagents.

Basic Information

Product Name	7-Amino-4-Hydroxy-3-[[2-Methoxy-4-[(3-Sulphophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	83783-91-9
Molecular Formula	C23H17N5O8S2Na
Molecular Weight	603.53 g/mol
Synonyms	Acid Red 337; C.I. 17200; Sodium 7-Amino-4-hydroxy-3-{[2-methoxy-4-[(3-sulfophenyl)diazenyl]phenyl]diazenyl}naphthalene-2-sulfonate; 7-Amino-4-hydroxy-3-{[2-methoxy-4-[(3-sulfophenyl)diazenyl]phenyl]diazenyl}-2-naphthalenesulfonic Acid Sodium Salt; Azo Dye Intermediate 83783-91-9; 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-((2-methoxy-4-((3-sulfophenyl)azo)phenyl)azo)-, sodium salt; 3-((2-Methoxy-4-((3-sulfophenyl)azo)phenyl)azo)-7-amino-4-hydroxy-2-naphthalenesulfonic Acid Sodium Salt
EINECS	Contact for details

Quality Control

Our 7-Amino-4-Hydroxy-3-[[2-Methoxy-4-[(3-Sulphophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee it meets your precise application requirements.

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 material is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed when not in use to prevent degradation and moisture absorption.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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