Description

Trisodium 5-[[2,6-Dihydroxy-3-[(4-Nitrophenyl)Azo]-5-[(4-Sulphonato-1-Naphthyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, multi-azo dye intermediate of significant industrial importance. Its complex molecular structure provides excellent chromophoric properties, making it a critical component for producing high-performance colorants. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to develop vibrant, durable, and complex shades.

Application

• Primary Intermediate for Reactive Dyes: Synthesis of high-grade reactive dyes for cotton, wool, and nylon fibers.
• Pigment Manufacturing: Key precursor in the production of high-performance organic pigments for inks and plastics.
• Specialty Coatings: Used in formulating advanced industrial and automotive coatings requiring specific color fastness.
• Analytical Chemistry: Potential use as a chromogenic agent or indicator in specific analytical methodologies.
• Research & Development: Serves as a building block for novel dye and pigment structures in R&D laboratories.

Basic Information

Product Name	Trisodium 5-[[2,6-Dihydroxy-3-[(4-Nitrophenyl)Azo]-5-[(4-Sulphonato-1-Naphthyl)Azo]Phenyl]Azo]-4-Hydroxy-3-[(4-Nitrophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	85851-56-5
Molecular Formula	C44H23N9Na3O18S3
Molecular Weight	~1120.86 g/mol
Synonyms	Trisodium 5-[[2,6-dihydroxy-3-[(4-nitrophenyl)azo]-5-[(4-sulphonato-1-naphthyl)azo]phenyl]azo]-4-hydroxy-3-[(4-nitrophenyl)azo]naphthalene-2,7-disulphonate; C.I. Reactive Black 5 Intermediate; Polyazo dye intermediate; Reactive Black 5 precursor; Trisodium salt of a polyazo dye acid; 85851-56-5; CAS 85851-56-5
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and meet specified impurity profiles. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and relevant physical parameters is provided with each shipment to support your quality assurance protocols.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark colored powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Solubility (1% in Water)	Complete, clear solution
Heavy Metals (as Pb)	≤ 20 ppm

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