Description

Disodium 4-[(4-Chloro-5-Ethyl-2-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its primary value lies in its excellent coupling properties and the ability to impart specific, durable shades in demanding applications. This compound is a critical raw material for manufacturers in the textile, ink, and specialty pigment industries seeking consistent quality and reliable performance in their formulations.

Application

• Primary Intermediate for Azo Dyes: Key building block for synthesizing a range of red, violet, and blue azo dyes and pigments.
• Textile Dyeing and Printing: Used in the production of dyes for coloring natural and synthetic fibers, including cotton, wool, and nylon.
• Ink Manufacturing: Imparts color in the formulation of inks for packaging, publications, and specialty printing.
• Industrial Pigments: Serves as a precursor for creating pigments used in plastics, paints, and coatings.
• Leather Coloring: Employed in the dyeing process for leather goods to achieve deep, uniform colors.
• Paper Coloring: Used in the production of dyes for specialty and decorative papers.

Basic Information

Product Name	Disodium 4-[(4-Chloro-5-Ethyl-2-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate
CAS No.	32041-58-0
Molecular Formula	C19H13ClN2Na2O6S
Molecular Weight	478.81 g/mol
Synonyms	4-[(4-Chloro-5-ethyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalenecarboxylic acid disodium salt; C.I. Azoic Coupling Component 7; Azoic Coupling Component 7; Naphthol AS-ITR; Disodium 4-[(4-chloro-5-ethyl-2-sulfonatophenyl)azo]-3-hydroxy-2-naphthoate; 2-Naphthalenecarboxylic acid, 4-[(4-chloro-5-ethyl-2-sulfophenyl)azo]-3-hydroxy-, disodium salt; C.I. 37555
EINECS	Contact for details

Quality Control

Our Disodium 4-[(4-Chloro-5-Ethyl-2-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and solubility. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee traceability and compliance with your quality standards.

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	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	7.0 - 9.0

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