Description

3-[[2,2'-Dimethyl-4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid is a high-purity, synthetic organic dye intermediate characterized by its complex azo and sulphonic acid functional groups. This compound is valued for its ability to impart vivid and stable coloration, making it a critical component in the production of advanced dyes and pigments. It is primarily sought by manufacturers in the textile, ink, and specialty coatings industries who require consistent quality and performance for high-end colorant applications.

Application

• Primary Dye Intermediate: Serves as a key precursor in the synthesis of high-performance azo dyes for textiles, leather, and paper.
• Pigment Manufacturing: Used in the production of organic pigments for industrial paints, inks, and plastics where color fastness is critical.
• Specialty Inks: Employed in the formulation of specialty printing inks, including those for security printing and high-resolution digital applications.
• Research & Development: Acts as a standard or building block in chemical research for developing new chromophores and functional materials.
• Analytical Reagent: Can be utilized as a staining agent or colorimetric indicator in specific laboratory and diagnostic procedures.

Basic Information

Product Name	3-[[2,2'-Dimethyl-4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid
CAS No.	29128-77-6
Molecular Formula	C41H30N4O9S3
Molecular Weight	818.89 g/mol
Synonyms	Acid Red 337; C.I. 17215; 4-Hydroxy-3-[[2,2'-dimethyl-4'-[[4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-2,7-naphthalenedisulfonic acid; 3-[[2,2'-Dimethyl-4'-[[4-[[(4-methylphenyl)sulphonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-4-hydroxy-2,7-naphthalenedisulphonic acid; Azo dye intermediate 29128-77-6; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-((2,2'-dimethyl-4'-((4-(((4-methylphenyl)sulfonyl)oxy)phenyl)azo)(1,1'-biphenyl)-4-yl)azo)-
EINECS	Contact for details

Quality Control

Our production of 3-[[2,2'-Dimethyl-4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonic Acid adheres to stringent quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and spectrophotometric analysis for color strength, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) with detailed specifications are provided and available upon request.

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, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0% (Standard Grade)
Moisture Content	≤ 5.0%
Ash Content	≤ 1.0%
Solubility	Soluble in alkaline water

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