Description

Tetrasodium 7,7'-[[6-(Phenylamino)-1,3,5-Triazine-2,4-Diyl]Diimino]Bis[4-Hydroxy-3-[(4-Methoxy-2-Sulphonatophenyl)Azo]Naphthalene-1-Sulphonate] is a high-purity, water-soluble anionic dye belonging to the class of reactive or direct dyes, known for its complex polyazo and triazine-based structure. This compound is engineered to deliver exceptional color strength, lightfastness, and substantivity to various substrates, making it a critical component in demanding coloration processes. It is primarily required by manufacturers in the textile, leather, and specialty paper industries seeking consistent, high-performance dyeing agents for natural and synthetic fibers.

Application

• Textile Dyeing: Primary application for dyeing cotton, wool, silk, and nylon fabrics, offering excellent wash and light fastness.
• Leather Finishing: Used for coloring leather goods, providing deep, uniform shades with good adhesion.
• Paper Coloration: Employed in the production of high-quality colored papers, including specialty and decorative papers.
• Ink Formulation: A key pigment for manufacturing inks used in jet printing, packaging, and security applications.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific affinity.
• Research & Development: Serves as a standard or intermediate in chemical research for developing new dye molecules and studying chromophore properties.

Basic Information

Product Name	Tetrasodium 7,7'-[[6-(Phenylamino)-1,3,5-Triazine-2,4-Diyl]Diimino]Bis[4-Hydroxy-3-[(4-Methoxy-2-Sulphonatophenyl)Azo]Naphthalene-1-Sulphonate]
CAS No.	42972-25-8
Molecular Formula	C58H38N12Na4O20S4
Molecular Weight	~1415.2 g/mol
Synonyms	Reactive Black 5 (Tetrasodium Salt); Direct Black 22; C.I. 20505; Tetrasodium 4-amino-5-hydroxy-3-[[4-[[4-[[7-(4-methoxy-2-sulfophenyl)azo]-8-hydroxy-3,6-disulfo-1-naphthalenyl]azo]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-2,7-naphthalenedisulfonate; C.I. Reactive Black 5; Remazol Black B; Levafix Black E-B
EINECS	Contact for details

Quality Control

Our Tetrasodium 7,7'-[[6-(Phenylamino)-1,3,5-Triazine-2,4-Diyl]Diimino]Bis[4-Hydroxy-3-[(4-Methoxy-2-Sulphonatophenyl)Azo]Naphthalene-1-Sulphonate] is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for color value, purity, and solubility. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture which may affect performance.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Color Strength	100% ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	Max. 20 ppm

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