Description

Trisodium 4-hydroxy-5-[[2-hydroxy-4-[[3-hydroxy-4-[[4-[(4-nitro-2-sulphonatophenyl)amino]phenyl]azo]phenyl]amino]phenyl]azo]-3-[(4-methoxyphenyl)azo]naphthalene-2,7-disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing complex, high-performance dyes and pigments, particularly for demanding applications requiring specific color fastness and stability. It is primarily needed by manufacturers in the textile, ink, and specialty coatings industries who require reliable intermediates for producing vibrant and durable colors.

Application

• Textile Dyeing: A key intermediate for the synthesis of reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of high-quality printing inks, including those for packaging and security applications.
• Specialty Coatings: Serves as a colorant precursor in industrial and automotive coatings where specific hue and lightfastness are required.
• Paper Coloring: Employed in the manufacture of dyes for coloring paper and paperboard products.
• Leather Finishing: Used in dye formulations for coloring leather goods.
• Research & Development: A valuable chemical for R&D laboratories developing new chromophores and functional dyes.

Basic Information

Product Name	Trisodium 4-hydroxy-5-[[2-hydroxy-4-[[3-hydroxy-4-[[4-[(4-nitro-2-sulphonatophenyl)amino]phenyl]azo]phenyl]amino]phenyl]azo]-3-[(4-methoxyphenyl)azo]naphthalene-2,7-disulphonate
CAS No.	85631-87-4
Molecular Formula	C45H30N8Na3O16S4
Molecular Weight	~1160.0 g/mol (Contact for exact details)
Synonyms	Reactive Black 5 Intermediate; Azo Dye Intermediate 85631-87-4; Trisodium 4-hydroxy-3-[(4-methoxyphenyl)azo]-5-[[2-hydroxy-4-[[3-hydroxy-4-[[4-[(4-nitro-2-sulfonatophenyl)amino]phenyl]azo]phenyl]amino]phenyl]azo]naphthalene-2,7-disulfonate; C.I. Reactive Black 5 related compound; Polyazo dye intermediate; Sulfonated azo dye precursor
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles 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, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in Water)	Freely 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.