Description

8-[[3,3'-Dimethyl-4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-7-Hydroxynaphthalene-1,3-Disulphonic Acid is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and sulphonic acid groups, makes it a critical precursor for producing vivid and stable colorants. This compound is essential for manufacturers in the dye and pigment industries seeking to develop specialized, high-performance products for demanding applications.

Application

This specialized azo dye intermediate serves as a key building block in the synthesis of advanced colorants. Its primary and related applications include:

• Precursor for High-Performance Dyes: Synthesis of acid dyes and direct dyes for textiles, leather, and paper.
• Specialty Pigment Manufacturing: Production of pigments for inks, coatings, and plastics requiring specific color fastness and stability.
• Research & Development: Used in chemical research for developing novel chromophores and studying azo dye chemistry.
• Functional Dye Synthesis: Potential intermediate for dyes used in non-textile applications, such as in analytical chemistry or imaging.

Basic Information

Product Name	8-[[3,3'-Dimethyl-4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-7-Hydroxynaphthalene-1,3-Disulphonic Acid
CAS No.	25317-45-7
Molecular Formula	C41H30N4O9S3
Molecular Weight	818.89 g/mol
Synonyms	Acid Red 337; C.I. 17210; 7-Hydroxy-8-[[4'-[4-[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-1,3-naphthalenedisulfonic acid; 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[[4'-[4-[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-; Azo dye intermediate 25317-45-7; 8-[[3,3'-Dimethyl-4'-[[4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-7-hydroxynaphthalene-1,3-disulfonic acid
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 purity. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, 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 R&D 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). Keep away from strong oxidizing agents. Due to its complex organic structure, prolonged exposure to elevated temperatures or humidity should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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