Description

Trisodium 5-[[2,4-Dihydroxy-5-[[4-(Phenylamino)-3-Sulphonatophenyl]Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its ability to impart strong, stable coloration and is a critical precursor in the synthesis of specialized dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking consistent performance and batch-to-batch uniformity for their high-value colorant products.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers.
• Specialty Ink Manufacturing: Used in the production of pigments for inks requiring specific color fastness and solubility properties, such as those for digital textile printing.
• Industrial Pigment Synthesis: Serves as a precursor for creating complex organic pigments used in plastics, paints, and coatings.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying azo dye chemistry and properties.
• Analytical Chemistry: Can be utilized as a standard or reagent in colorimetric analysis and detection methods.

Basic Information

Item	Details
Product Name	Trisodium 5-[[2,4-Dihydroxy-5-[[4-(Phenylamino)-3-Sulphonatophenyl]Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	85631-82-9
Molecular Formula	C34H20N6Na3O16S3
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (precursor); C.I. 20505; Trisodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-(phenylamino)-2,7-naphthalenedisulfonate azo dye; 5-[[2,4-Dihydroxy-5-[(4-anilino-3-sulfophenyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]-2,7-naphthalenedisulfonic acid trisodium salt; Azo Black; Acid Black 5G; Direct Black 5G
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure high purity and consistent performance for downstream synthesis. Every batch is analyzed using advanced techniques like HPLC to confirm identity and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and specific tests is provided with each shipment to support your quality assurance and regulatory needs.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	7.0 - 9.0

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