Description

Disodium 3-[[5-Chloro-2-(Phenylmethoxy)Phenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate of significant commercial importance. Its complex molecular structure, featuring a naphthalene disulphonate core, makes it a critical precursor for producing specialized dyes and pigments with enhanced color fastness and stability. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to develop high-performance colorants for demanding applications.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for cotton and other cellulosic fibers.
• Specialty Pigment Manufacturing: Used in the production of high-performance organic pigments for automotive paints, industrial coatings, and plastics.
• Inkjet Ink Formulations: Serves as a precursor for dyes used in professional and industrial digital printing inks, requiring excellent lightfastness and water resistance.
• Functional Dye Synthesis: Employed in research and production of dyes for non-textile applications, such as in optical data storage or as biological stains.
• Laboratory Research & Development: Used as a standard or starting material in chemical R&D for novel chromophores and dye-sensitized materials.

Basic Information

Product Name	Disodium 3-[[5-Chloro-2-(Phenylmethoxy)Phenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate
CAS No.	6826-53-5
Molecular Formula	C30H22ClN3Na2O10S3
Molecular Weight	778.18 g/mol
Synonyms	Acid Red 337; C.I. 17210; Disodium 5-[[(4-methylphenyl)sulfonyl]amino]-3-[[2-(benzyloxy)-5-chlorophenyl]azo]-4-hydroxy-2,7-naphthalenedisulfonate; 2,7-Naphthalenedisulfonic acid, 5-[[(4-methylphenyl)sulfonyl]amino]-3-[[2-(benzyloxy)-5-chlorophenyl]azo]-4-hydroxy-, disodium salt; Benzenesulfonamide, N-[3-[[2-(benzyloxy)-5-chlorophenyl]azo]-4-hydroxy-6,7-disulfo-2-naphthalenyl]-4-methyl-, disodium salt
EINECS	229-902-7

Quality Control

Our production of Disodium 3-[[5-Chloro-2-(Phenylmethoxy)Phenyl]Azo]-4-Hydroxy-5-[[(p-Tolyl)Sulphonyl]Amino]Naphthalene-2,7-Disulphonate adheres to a stringent quality management system. Every batch is analyzed to ensure high purity and consistency, with specifications tailored to meet the demands of dye and pigment synthesis. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided with each shipment to guarantee traceability and compliance with your technical requirements.

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 tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95.0%
Loss on Drying	Max. 5.0%
Sulfated Ash	Max. 20.0%
Heavy Metals (as Pb)	Max. 20 ppm
Related Substances (HPLC)	Total impurities: Max. 5.0% Any single impurity: Max. 1.0%

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