Description

Trisodium 7-[[4-[[3-(aminosulphonyl)phenyl]amino]-6-anilino-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[2-sulphonato-4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate is a high-purity, water-soluble anionic dye belonging to the class of reactive or direct dyes, characterized by its complex polyazo and triazine-based molecular structure. This compound is engineered to deliver exceptional color strength, lightfastness, and wash-fastness, making it a critical component for demanding coloration processes. It is primarily required by manufacturers in the textile, leather, and specialty paper industries seeking reliable and consistent dye performance.

Application

• Textile Dyeing: Primary application for dyeing cotton, wool, silk, and nylon fibers, offering excellent substantivity and fixation.
• Leather Finishing: Used for coloring leather goods, providing deep, uniform shades with good rub-fastness.
• Paper Coloration: Employed in the production of specialty and decorative papers requiring vibrant, stable colors.
• Ink Formulation: A key pigment for manufacturing inks used in jet printing and other specialty applications.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific chromogenic properties.
• Research & Development: Serves as a standard or intermediate in chemical research for developing new dye molecules and studying chromophore behavior.

Basic Information

Product Name	Trisodium 7-[[4-[[3-(aminosulphonyl)phenyl]amino]-6-anilino-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[2-sulphonato-4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate
CAS No.	79135-80-1
Molecular Formula	C41H26N11Na3O14S4
Molecular Weight	1083.92 g/mol (approx.)
Synonyms	Reactive Black 5 (Triazine derivative); C.I. 20505; Direct Black 22 (related); Trisodium 4-amino-5-hydroxy-3-[[4-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]phenyl]azo]-6-[[4-[[3-(sulfamoyl)phenyl]amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]-2,7-naphthalenedisulfonate; Polyazo dye with triazine group; Anionic disazo dye; Sulfonated azo-triazine dye
EINECS	Contact for details

Quality Control

Our production of this dye adheres to stringent quality control protocols to ensure batch-to-batch consistency in color value, purity, and performance. Each lot is analyzed against key parameters including spectrophotometric purity, heavy metal content, and ionic impurity profiles. A comprehensive Certificate of Analysis (COA) detailing assay, physical properties, and conformance to specification is provided with every shipment, supporting your quality assurance and regulatory compliance needs.

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 or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Dye Content)
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Ash Content	≤ 30.0%

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