Description

Trisodium 3-[[4-[[6-(Anilino)-1-Hydroxy-3-Sulphonato-2-Naphthyl]Azo]-5-Methoxy-o-Tolyl]Azo]Naphthalene-1,5-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure, featuring multiple sulphonate groups, makes it a critical precursor for synthesizing high-performance dyes and pigments. This compound is essential for manufacturers requiring consistent quality and reliable supply chains for producing specialized colorants. Its primary value lies in enabling the creation of vivid, stable colors for demanding technical applications.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-grade reactive dyes for textile coloring, particularly for cotton and other cellulose fibers.
• Production of Acid Dyes: Used in the manufacture of acid dyes for coloring protein fibers like wool, silk, and nylon, offering good lightfastness and washfastness.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in inks, paints, and plastics where high color strength and stability are required.
• Functional Dye Manufacturing: Employed in the production of dyes for non-textile applications, including paper, leather, and food colorants (where specific purity grades are met).
• Research & Development: Used in chemical R&D laboratories for developing new chromophores and studying azo dye chemistry and properties.

Basic Information

Product Name	Trisodium 3-[[4-[[6-(Anilino)-1-Hydroxy-3-Sulphonato-2-Naphthyl]Azo]-5-Methoxy-o-Tolyl]Azo]Naphthalene-1,5-Disulphonate
CAS No.	6227-20-9
Molecular Formula	C34H23N5Na3O12S3
Molecular Weight	860.73 g/mol
Synonyms	Reactive Black 5 Intermediate; C.I. Reactive Black 5, trisodium salt; Trisodium 4-amino-5-hydroxy-3-[[4-[[2-(sulfonatooxy)ethyl]sulfonyl]phenyl]azo]-6-(phenylamino)-2,7-naphthalenedisulfonate; Remazol Black B (Intermediate); 3-[[4-[[6-(Anilino)-1-hydroxy-3-sulfo-2-naphthalenyl]azo]-5-methoxy-2-methylphenyl]azo]-1,5-naphthalenedisulfonic acid trisodium salt; C.I. 20505; Reactive Black B; Vinylsulfone Black B Intermediate
EINECS	228-320-2

Quality Control

Our production of Trisodium 3-[[4-[[6-(Anilino)-1-Hydroxy-3-Sulphonato-2-Naphthyl]Azo]-5-Methoxy-o-Tolyl]Azo]Naphthalene-1,5-Disulphonate adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity for industrial synthesis. Each lot is analyzed against rigorous in-house specifications, which typically include parameters for assay (HPLC), sulfonate content, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfonate Content	Contact for details
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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