Description

6-Amino-5-[[2-[Ethyl(Phenylsulfonyl)Amino]Phenyl]Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its role in synthesizing specialized dyes and pigments with specific coloristic and fastness properties. It is primarily required by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of acid, direct, and reactive dyes for textiles.
• Specialty Ink Production: Used in formulating high-quality inks for packaging, security printing, and digital applications.
• Functional Pigment Synthesis: Serves as a precursor for pigments used in plastics, coatings, and advanced materials.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying dye chemistry.
• Analytical Chemistry: Can be utilized as a reagent or standard in chromatographic and spectroscopic analysis.

Basic Information

Product Name	6-Amino-5-[[2-[Ethyl(Phenylsulfonyl)Amino]Phenyl]Azo]-4-Hydroxy-2-Naphthalenesulfonic Acid Sodium Salt
CAS No.	72207-99-9
Molecular Formula	C24H21N4O6S2Na
Molecular Weight	572.56 g/mol
Synonyms	Sodium 6-Amino-5-{[2-(ethyl(phenylsulfonyl)amino)phenyl]diazenyl}-4-hydroxy-2-naphthalenesulfonate; Acid Red 337 (C.I. 17200); C.I. Acid Red 337; 6-Amino-4-hydroxy-5-{[2-(N-ethyl-N-(phenylsulfonyl)amino)phenyl]azo}-2-naphthalenesulfonic acid sodium salt; Azo dye intermediate 72207-99-9; Naphthalenesulfonic acid derivative dye intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and composition. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment 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 a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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