Description

Trisodium 4-[[3-[[3-[4,5-dihydro-3-methyl-5-oxo-4-[(4-sulphonatophenyl)azo]-1H-pyrazol-1-yl]phenyl]azo]-2,4-dihydroxyphenyl]azo]-5-hydroxy-6-(phenylazo)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 vivid and stable coloration, making it a critical component in the synthesis of advanced dyes and pigments. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries who require consistent quality and reliable performance in their formulations.

Application

• Textile Dyeing: A key intermediate for producing reactive and direct dyes for cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the formulation of high-performance inks for digital, packaging, and security printing applications.
• Industrial Pigments: Serves as a precursor for creating organic pigments used in plastics, paints, and coatings.
• Leather Coloring: Employed in the synthesis of dyes for the uniform and durable coloring of leather goods.
• Paper Coloring: Utilized in the production of dyes for specialty and decorative papers.
• Research & Development: Acts as a standard or starting material in chemical research for developing new chromophores and functional materials.

Basic Information

Product Name	Trisodium 4-[[3-[[3-[4,5-dihydro-3-methyl-5-oxo-4-[(4-sulphonatophenyl)azo]-1H-pyrazol-1-yl]phenyl]azo]-2,4-dihydroxyphenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate
CAS No.	85631-86-3
Molecular Formula	C40H24N10Na3O14S3
Molecular Weight	Approx. 1045.89 g/mol
Synonyms	Trisodium 1,3,6-Naphthalenetrisulfonate azo dye intermediate; C.I. Reactive Black 5 intermediate (related); Polyazo dye intermediate; Trisulfonated azo dye; Tetrasodium salt variant may exist; Complex metallizable azo compound; High molecular weight diazo component; Water-soluble naphthalene dye precursor
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 comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every 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 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 performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Completely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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