Description

2-[4-[[4-[[1-Ethyl-1,6-Dihydro-2-Hydroxy-4-Methyl-6-Oxo-5-(Sulphomethyl)-3-Pyridyl]Azo]Benzoyl]Amino]Phenyl]-6-Methylbenzothiazole-7-Sulphonic Acid is a high-purity, complex azo dye intermediate essential for producing vibrant and stable colorants. Its value lies in its precise molecular structure, which enables the synthesis of specialized dyes with excellent lightfastness and chemical resistance for demanding applications. This product is critically needed by manufacturers in the textile, ink, and specialty polymer industries seeking to develop high-performance pigments and functional colorants.

Application

• Textile Dyeing: A key precursor for synthesizing reactive and acid dyes used on natural and synthetic fibers like cotton, wool, and nylon.
• Ink Manufacturing: Used in the production of high-quality pigments for printing inks, including those for packaging and security applications.
• Functional Colorants: Serves as an intermediate for creating dyes used in specialized applications such as laser marking, optical data storage, and liquid crystal displays (LCDs).
• Polymer Staining: Employed in the synthesis of dyes for coloring engineering plastics and synthetic resins to achieve consistent, durable coloration.
• Research & Development: A valuable building block in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Analytical Reagents: Can be utilized in the formulation of specialized stains and indicators for analytical chemistry and biological assays.

Basic Information

Item	Details
Product Name	2-[4-[[4-[[1-Ethyl-1,6-Dihydro-2-Hydroxy-4-Methyl-6-Oxo-5-(Sulphomethyl)-3-Pyridyl]Azo]Benzoyl]Amino]Phenyl]-6-Methylbenzothiazole-7-Sulphonic Acid
CAS No.	65402-16-6
Molecular Formula	C31H27N5O8S2
Molecular Weight	661.70 g/mol
Synonyms	Acid Red 337; C.I. 17200; 2-[4-[[4-[[1-Ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-5-(sulfomethyl)-3-pyridinyl]azo]benzoyl]amino]phenyl]-6-methylbenzothiazol-7-sulfonic acid; 6-Methyl-2-[p-[p-[[1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-5-(sulfomethyl)-3-pyridyl]azo]benzamido]phenyl]benzothiazole-7-sulfonic acid; 1-Ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxo-5-(sulfomethyl)-3-pyridyl azo benzanilide benzothiazole sulfonic acid; Azo dye intermediate 65402-16-6; 7-Sulfo-6-methyl-2-[4'-[4''-(1'''-ethyl-1''',6'''-dihydro-2'''-hydroxy-4'''-methyl-6'''-oxo-5'''-sulfomethyl-3'''-pyridylazo)benzoylamino]phenyl]benzothiazole
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. Certificates of Analysis (COA) detailing all critical parameters are provided and available upon request to support your quality assurance protocols.

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). Keep away from strong acids and incompatible organic solvents. The container should be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%
Solubility	Soluble in alkaline water; sparingly soluble in most organic solvents

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