Description

5-[[2-[(n-Ethyl-n-Phenylamino)Sulfonyl]Phenyl]Azo]-6-Hydroxy-2-Naphthalenesulfonic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its value lies in its ability to impart specific, durable shades in demanding industrial applications, ensuring consistent batch-to-batch performance. This compound is primarily needed by manufacturers in the textile, ink, and specialty chemical industries seeking reliable intermediates for high-performance dye synthesis.

Application

• Textile Dyeing: A key intermediate for synthesizing acid and direct dyes used on nylon, silk, wool, and paper.
• Ink Formulation: Used in the production of pigments for inks in packaging, printing, and writing instruments.
• Leather Coloring: Serves as a precursor for dyes applied in the leather tanning and finishing industry.
• Biological Staining: Potential use in the synthesis of histological stains for laboratory and diagnostic applications.
• Specialty Chemical Synthesis: Acts as a versatile building block for creating complex organic molecules and functional colorants.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo dye chemistry.

Basic Information

Product Name	5-[[2-[(n-Ethyl-n-Phenylamino)Sulfonyl]Phenyl]Azo]-6-Hydroxy-2-Naphthalenesulfonic Acid Sodium Salt
CAS No.	82944-41-0
Molecular Formula	C24H20N3NaO6S2
Molecular Weight	533.55 g/mol
Synonyms	Sodium 5-[[2-[(N-ethyl-N-phenylamino)sulfonyl]phenyl]azo]-6-hydroxy-2-naphthalenesulfonate; C.I. Acid Red 337; Acid Red 337; 5-[(2-[(Ethylphenylamino)sulfonyl]phenyl)azo]-6-hydroxy-2-naphthalenesulfonic acid sodium salt; 82944-41-0; Azo dye intermediate Red 337; N-Ethyl-N-phenyl-2-[(6-hydroxy-5-[(2-sulfophenyl)azo]-2-naphthyl]sulfonamide sodium salt
EINECS	Contact for details

Quality Control

Our production of 5-[[2-[(n-Ethyl-n-Phenylamino)Sulfonyl]Phenyl]Azo]-6-Hydroxy-2-Naphthalenesulfonic Acid Sodium Salt adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity and consistent chemical composition, meeting the exacting standards required for industrial dye synthesis. Comprehensive Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available upon request to support 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). 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 stability and performance.

Specification

Item	Specification
Appearance	Reddish-brown to dark red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Content (Karl Fischer)	≤ 3.0%
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.