Description

7-Amino-4-Hydroxy-3-[[4-[2-(Sulphooxy)Ethoxy]Phenyl]Azo]Naphthalene-2-Sulphonic Acid is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its core value lies in its ability to impart vibrant and stable color properties, making it a critical precursor for advanced synthetic dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to develop high-performance colorants with excellent fastness properties.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton and other cellulosic fibers.
• Specialty Pigment Manufacturing: Used in the production of specialized pigments for inks, coatings, and plastics requiring specific hue and stability.
• Textile Dyeing and Printing: Imparts color in industrial textile applications where wash and light fastness are critical requirements.
• Research & Development: Serves as a valuable chemical entity in R&D labs for developing novel chromophores and functional dyes.
• Analytical Chemistry Reagent: Can be utilized as a staining agent or a colorimetric substrate in certain analytical procedures.

Basic Information

Product Name	7-Amino-4-Hydroxy-3-[[4-[2-(Sulphooxy)Ethoxy]Phenyl]Azo]Naphthalene-2-Sulphonic Acid
CAS No.	68400-37-3
Molecular Formula	C18H16N4O9S2
Molecular Weight	496.47 g/mol
Synonyms	7-Amino-4-hydroxy-3-[(4-(2-sulfooxyethoxy)phenyl)azo]naphthalene-2-sulfonic acid; C.I. Reactive Red 238 intermediate; Azo dye intermediate 68400-37-3; 3-[[4-[2-(Sulphooxy)Ethoxy]Phenyl]Azo]-7-Amino-4-Hydroxy-2-Naphthalenesulphonic Acid; 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[[4-[2-(sulfooxy)ethoxy]phenyl]azo]-; Reactive Dye Intermediate RR238
EINECS	Contact for details

Quality Control

Our production of 7-Amino-4-Hydroxy-3-[[4-[2-(Sulphooxy)Ethoxy]Phenyl]Azo]Naphthalene-2-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, guaranteeing traceability and product integrity for your quality assurance processes.

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 product is hygroscopic (moisture-sensitive); ensure the container is kept sealed to prevent absorption of atmospheric moisture, which may affect product performance.

Specification

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

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