Description

Trisodium 5-[[4-Chloro-6-(Ethylphenylamino)-1,3,5-Triazin-2-Yl]Amino]-4-Hydroxy-3-[(2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, water-soluble anionic dye belonging to the reactive azo dye class, identified by CAS No. 72829-25-5. This compound is engineered for exceptional color fastness and chemical stability, making it a critical component in demanding industrial coloration processes. It is primarily utilized by manufacturers in the textile, leather, and specialty paper industries seeking vibrant, durable hues with reliable batch-to-batch consistency.

Application

• Reactive Dyeing of Cellulosic Fibers: Primary application for cotton, rayon, and linen, forming covalent bonds with the fiber for excellent wash and light fastness.
• Leather Finishing: Used for coloring full-grain and corrected-grain leather, providing deep, uniform shades.
• Paper Coloration: Imparts bright, stable colors to specialty papers, including decorative and packaging grades.
• Ink Formulation: A key pigment for industrial inks requiring specific solubility and color properties.
• Biological Staining (Research Grade): Potential use as a histological stain in life science research applications.
• Dye Intermediate: Serves as a precursor or intermediate in the synthesis of more complex dye molecules.

Basic Information

Product Name	Trisodium 5-[[4-Chloro-6-(Ethylphenylamino)-1,3,5-Triazin-2-Yl]Amino]-4-Hydroxy-3-[(2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	72829-25-5
Molecular Formula	C31H20ClN8Na3O11S3
Molecular Weight	889.18 g/mol
Synonyms	Reactive Black 5 (sodium salt); C.I. Reactive Black 5; Trisodium 4-amino-5-hydroxy-3-[(4-[(2-sulfophenyl)azo]-7-sulfo-2-naphthyl)azo]-6-(phenylamino)-1,3,5-triazine-2-yl]amino]-2,7-naphthalenedisulfonate; Remazol Black B; Sumifix Black B; Levafix Black EB; Procion Black H-EXL; Dye Reactive Black 5
EINECS	Contact for details

Quality Control

Our production of Trisodium 5-[[4-Chloro-6-(Ethylphenylamino)-1,3,5-Triazin-2-Yl]Amino]-4-Hydroxy-3-[(2-Sulphonatophenyl)Azo]Naphthalene-2,7-Disulphonate adheres to a rigorous quality management system. Every batch is analyzed to meet precise specifications for color strength, purity, and solubility. Comprehensive testing includes HPLC for assay and impurity profiling, ensuring compliance with industry standards for textile and leather applications. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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 when not in use to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content (KF)	≤ 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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