Description

Trisodium 6-[(4-amino-2-hydroxyphenyl)azo]-3-[[4-[[4-[[7-[(4-amino-2-hydroxyphenyl)azo]-1-hydroxy-3-sulphonato-2-naphthyl]azo]phenyl]amino]-3-sulphonatophenyl]azo]-4-hydroxynaphthalene-2-sulphonate is a high-purity, complex azo dye intermediate essential for producing vivid and stable colorants. Its value lies in its ability to impart strong, durable coloration with excellent light and wash fastness properties in demanding applications. This product is a critical raw material for manufacturers in the textile, leather, ink, and specialty coatings industries seeking reliable and consistent color performance.

Application

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, particularly where deep, intense shades and high fastness are required.
• Leather Finishing: Used in the coloration of leather goods, providing rich, uniform color with good penetration and durability.
• Ink Manufacturing: A key component in the formulation of high-performance inks for packaging, security, and specialty printing.
• Industrial Coatings: Employed in pigments and colorants for plastics, paints, and other polymer-based coatings.
• Paper Coloration: Suitable for specialty paper products requiring specific, stable color characteristics.
• Research & Development: Serves as a precise chemical intermediate for synthesizing novel dyes and pigments in laboratory settings.

Basic Information

Product Name	Trisodium 6-[(4-amino-2-hydroxyphenyl)azo]-3-[[4-[[4-[[7-[(4-amino-2-hydroxyphenyl)azo]-1-hydroxy-3-sulphonato-2-naphthyl]azo]phenyl]amino]-3-sulphonatophenyl]azo]-4-hydroxynaphthalene-2-sulphonate
CAS No.	79057-88-8
Molecular Formula	C46H30N10Na3O16S4
Molecular Weight	~1192.0 g/mol (Contact for exact details)
Synonyms	Reactive Black 5 (sodium salt); C.I. Reactive Black 5; Remazol Black B; Reactive Black B; Lanasol Black B; Procion Black H-EXL; Trisodium 8-[(4-amino-5-hydroxy-2,7-disulfonato-3-naphthyl)diazenyl]-5-[[4-[[4-[(4-amino-6-hydroxy-3-sulfonato-m-tolyl)diazenyl]phenyl]amino]-3-sulfonatophenyl]diazenyl]-2-naphthalenesulfonate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and reliability. Every lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to meet precise customer specifications. A detailed Certificate of Analysis (COA) documenting all critical 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 ambient temperature (15-25°C). Keep away from strong oxidizing agents. The material is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 30.0%

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