Description

Pentasodium 4-hydroxy-7-[[4-[2-(4-nitro-2-sulphonatophenyl)vinyl]-3-sulphonatophenyl]azo]-3-[[2-sulphonato-4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex poly-sulphonated structure provides excellent solubility and binding properties, making it a critical precursor for high-performance colorants. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, stable, and wash-fast dyes and pigments.

Application

This advanced azo dye intermediate is engineered for precision synthesis in demanding colorant applications. Its primary and derived uses include:

• Textile Dyeing: As a key precursor for synthesizing reactive and direct dyes for cotton, wool, and nylon, offering excellent color fastness and brightness.
• Inkjet Inks: Used in the production of high-quality pigments for industrial and commercial printing inks, ensuring superior color gamut and stability.
• Specialty Coatings: Serves as an intermediate for colorants in automotive, architectural, and industrial coatings requiring UV resistance and durability.
• Paper Coloring: Employed in the manufacture of dyes for high-grade paper and packaging materials.
• Leather Finishing: Used to produce dyes for leather goods, providing deep, uniform coloration.
• Biological Staining: Potential use as an intermediate for histological stains and indicators in laboratory settings.
• Functional Dyes: A building block for dyes used in optical data storage, liquid crystal displays (LCDs), and other advanced material science applications.

Basic Information

Product Name	Pentasodium 4-hydroxy-7-[[4-[2-(4-nitro-2-sulphonatophenyl)vinyl]-3-sulphonatophenyl]azo]-3-[[2-sulphonato-4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate
CAS No.	94713-29-8
Molecular Formula	C46H24N6Na5O23S5 (or similar based on structure)
Molecular Weight	Contact for details
Synonyms	4-Hydroxy-7-[[4-[2-(4-nitro-2-sulfonatophenyl)vinyl]-3-sulfonatophenyl]azo]-3-[[2-sulfonato-4-[(4-sulfonatophenyl)azo]phenyl]azo]naphthalene-2-sulfonate, pentasodium salt; Polyazo dye intermediate; Reactive Black 5 precursor (related); Sulphonated polyazo compound; C.I. Direct Black 22 (related structure); Pentasodium salt of a disazo dye; Water-soluble azo dye intermediate; Tetrasulphonated azo dye intermediate.
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for your synthesis processes. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity, strength, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing purity, heavy metal content, and other critical parameters is provided with each shipment to support your quality assurance and regulatory compliance 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). Keep away from strong oxidizing agents and incompatible materials. The container must be kept tightly sealed to protect the contents from moisture and contamination.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content	Max. 5.0%
Sulfated Ash	Within typical range
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Freely soluble

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