Description

4-Hydroxy-3-[[4-[[[3-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Amino]Carbonyl]Phenyl]Azo]Naphthalene-1-Sulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate characterized by its complex sulphonated structure. This compound is essential for synthesizing reactive and acid dyes, providing excellent color fastness and strong affinity to various substrates. It is primarily required by manufacturers in the textile, leather, and specialty chemical industries for producing vivid and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton, viscose, and other cellulosic fibers.
• Acid Dye Production: Used in the manufacture of acid dyes for coloring wool, silk, and nylon with excellent wash and light fastness.
• Leather Dyeing: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Ink and Pigment Manufacturing: Serves as a precursor for certain high-grade pigments and inks used in printing applications.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying azo dye chemistry.
• Specialty Chemical Synthesis: Acts as an intermediate for other sulphonated aromatic compounds with specific functional properties.

Basic Information

Item	Details
Product Name	4-Hydroxy-3-[[4-[[[3-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Amino]Carbonyl]Phenyl]Azo]Naphthalene-1-Sulphonic Acid, Sodium Salt
CAS No.	93951-20-3
Molecular Formula	C25H19N3O11S3Na
Molecular Weight	Contact for details
Synonyms	Acid Red 337 (sodium salt); C.I. 17200; Sodium 4-hydroxy-3-((4-((3-((2-sulfooxyethyl)sulfonyl)phenyl)carbamoyl)phenyl)diazenyl)naphthalene-1-sulfonate; Reactive Red Dye Intermediate; 1-Naphthalenesulfonic acid, 4-hydroxy-3-((4-((3-((2-sulfooxyethyl)sulfonyl)phenyl)carbamoyl)phenyl)azo)-, sodium salt; Azo dye intermediate 93951-20-3; Sulphonated azo dye precursor
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and high chemical purity. Quality is verified through advanced analytical techniques including HPLC, FT-IR, and titration methods. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance 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). Due to its hygroscopic nature, the container must be kept sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Sulphated Ash	Contact for details
Heavy Metals (as Pb)	Max. 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.