Description

Trisodium 3-[[4-[[[[2-Methoxy-4-[(3-Sulphonatophenyl)Azo]Phenyl]Amino]Carbonyl]Amino]-o-Tolyl]Azo]Naphthalene-1,5-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart a strong, stable color and its role as a key precursor in the synthesis of more complex dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent chromophore building blocks for their formulations.

Application

• Primary Intermediate for Reactive Dyes: A critical building block in the synthesis of reactive dyes for cotton, wool, and nylon fibers.
• Textile Dyeing and Printing: Used in the production of dyes for exhaust dyeing, continuous dyeing, and printing processes.
• Ink Manufacturing: Serves as a colorant intermediate for the formulation of inks, including those for packaging and digital textile printing.
• Specialty Coatings and Paints: Employed in the creation of colored pigments for industrial and decorative coatings.
• Paper Coloring: Used in the manufacture of dyes for coloring paper and paper products.
• Leather Dyeing: Acts as an intermediate for dyes used in the leather tanning and finishing industry.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.

Basic Information

Product Name	Trisodium 3-[[4-[[[[2-Methoxy-4-[(3-Sulphonatophenyl)Azo]Phenyl]Amino]Carbonyl]Amino]-o-Tolyl]Azo]Naphthalene-1,5-Disulphonate
CAS No.	28706-19-6
Molecular Formula	C31H21N6Na3O11S3
Molecular Weight	858.68 g/mol
Synonyms	Reactive Red 120 (Parent Dye); Trisodium 6-[[4-[[4-[(2-Methoxy-4-((3-sulfophenyl)azo)phenyl)amino]carbonyl]amino]-2-methylphenyl]azo]-1,5-naphthalenedisulfonate; C.I. Reactive Red 120; Reactive Red KE-3B; Reactive Red KE-4B; Reactive Brilliant Red KE-3B; Benzenesulfonic acid, 2-methoxy-4-((3-sulfophenyl)azo)-, reaction products with 4-((4-amino-2-methylphenyl)azo)-1,5-naphthalenedisulfonic acid and sodium carbonate; 1,5-Naphthalenedisulfonic acid, 6-[[4-[[[4-[(2-methoxy-4-[(3-sulfophenyl)azo]phenyl)amino]carbonyl]amino]-2-methylphenyl]azo]-, trisodium salt
EINECS	Contact for details

Quality Control

Our Trisodium 3-[[4-[[[[2-Methoxy-4-[(3-Sulphonatophenyl)Azo]Phenyl]Amino]Carbonyl]Amino]-o-Tolyl]Azo]Naphthalene-1,5-Disulphonate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure high purity, consistent color strength, and batch-to-batch reproducibility essential for industrial dye synthesis. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and solubility are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is moisture-sensitive (hygroscopic). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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