Description

Trisodium 3-[(2-Chloro-4-Nitrophenyl)Azo]-5-[[2,4-Dihydroxy-5-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex, multi-azo structure is engineered to provide excellent color strength and specific light-fastness properties for demanding applications. This compound is primarily sought by manufacturers in the textile, ink, and specialty pigment industries for the production of high-performance dyes.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon, offering vibrant shades with good wash fastness.
• Ink Manufacturing: Used in the formulation of industrial inks, including those for packaging and specialty printing, where color consistency is critical.
• Pigment Production: Serves as a precursor in the manufacture of high-grade organic pigments used in plastics, coatings, and masterbatches.
• Leather Coloring: Employed in the production of dyes for leather finishing, providing deep, uniform coloration.
• Paper Staining: Utilized in the paper industry for the coloring of specialty papers and boards.
• Research & Development: Serves as a valuable reference standard and building block in chemical R&D for novel colorant synthesis.

Basic Information

Item	Details
Product Name	Trisodium 3-[(2-Chloro-4-Nitrophenyl)Azo]-5-[[2,4-Dihydroxy-5-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate
CAS No.	85391-42-0
Molecular Formula	C40H22ClN9Na3O18S4
Molecular Weight	Approx. 1190.3 g/mol
Synonyms	Reactive Black 5 (precursor/intermediate related); C.I. 20505 (related index); Trisodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-(phenylazo)-2,7-naphthalenedisulfonate derivative; Azo dye intermediate 85391-42-0; Multi-azo naphthalene disulfonate; Black 5 dye intermediate; Textile dye intermediate CAS 85391-42-0
EINECS	Contact for details

Quality Control

Our production of Trisodium 3-[(2-Chloro-4-Nitrophenyl)Azo]-5-[[2,4-Dihydroxy-5-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Azo]-4-Hydroxynaphthalene-2,7-Disulphonate adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and batch-to-batch reliability. Certificates of Analysis (COA) detailing all specifications are provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. The container should be kept tightly sealed to protect from moisture.

Specification

Item	Specification
Appearance	Dark blue to black 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
Related Substances (HPLC)	Total impurities: Max. 5.0%

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