Description

Tetrasodium 4-Amino-3-[[4-[2-[4-[(2,4-Diaminophenyl)Azo]-2-Sulphonatophenyl]Vinyl]-3-Sulphonatophenyl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, water-soluble polyazo dye intermediate. This compound is valued for its ability to impart deep, vibrant colors and its excellent binding properties in various substrates. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking consistent and reliable colorant precursors.

Application

• Textile Dyeing: As a key intermediate for producing high-grade, wash-fast reactive and direct dyes for cotton, wool, and nylon.
• Ink Manufacturing: Used in the synthesis of pigments for industrial inks, including those for packaging and digital printing.
• Specialty Coatings: Serves as a colorant precursor in coatings for paper, leather, and other specialty surfaces.
• Research & Development: Employed in chemical research for developing new chromophores and studying azo dye chemistry.
• Biological Staining: Potential use in the development of histological stains for microscopy, given its complex aromatic structure.

Basic Information

Product Name	Tetrasodium 4-Amino-3-[[4-[2-[4-[(2,4-Diaminophenyl)Azo]-2-Sulphonatophenyl]Vinyl]-3-Sulphonatophenyl]Azo]-5-Hydroxy-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	51473-76-8
Molecular Formula	C44H28N10Na4O16S4
Molecular Weight	~1192.98 g/mol (Contact for exact details)
Synonyms	Reactive Black 5 Tetrasodium Salt; C.I. Reactive Black 5; Remazol Black B; Tetrasodium 4-Amino-6-[4-[2-(4-amino-6-sulfo-1-naphthyl)diazenyl]-2-sulfophenyl]ethenyl]-5-hydroxy-3-[(4-sulfophenyl)diazenyl]-2,7-naphthalenedisulfonate; Lanasol Black B; Sumifix Black B; Drimarene Black B; Polyazo Dye Intermediate CAS 51473-76-8
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 and spectrophotometry. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance systems.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	Max. 20 ppm

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