Description

Tetrasodium (3Z)-5-amino-4-oxo-6-[4-(2-sulfonatooxyethylsulfonyl)phenyl]diazenyl-3-[[4-(2-sulfonatooxyethylsulfonyl)phenyl]hydrazinylidene]naphthalene-2,7-disulfonate is a high-purity, water-soluble reactive dye intermediate of significant commercial importance. This compound is valued for its ability to form strong covalent bonds with cellulosic fibers, resulting in exceptional wash and light fastness properties. It is primarily utilized by manufacturers in the textile and specialty chemical industries for the synthesis of high-performance reactive dyes and pigments.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-quality reactive dyes used in cotton, viscose, and other cellulosic fiber dyeing and printing.
• Textile Industry: Imparts brilliant and durable shades with excellent fastness to washing, light, and rubbing in textile applications.
• Specialty Pigments: Used in the production of specialized pigments for inks, coatings, and other colorant applications requiring high stability.
• Research & Development: Serves as a critical building block in R&D for developing novel chromophores and dye structures with enhanced properties.
• Chemical Intermediate: Employed in further chemical transformations to create dyes with specific functional groups or performance characteristics.

Basic Information

Item	Details
Product Name	Tetrasodium (3Z)-5-amino-4-oxo-6-[4-(2-sulfonatooxyethylsulfonyl)phenyl]diazenyl-3-[[4-(2-sulfonatooxyethylsulfonyl)phenyl]hydrazinylidene]naphthalene-2,7-disulfonate
CAS No.	90598-98-4
Molecular Formula	C34H26N6Na4O20S6
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 Tetrasodium Salt; C.I. Reactive Black 5; Remazol Black B; Tetrasodium 4-amino-5-hydroxy-3,6-bis((4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)diazenyl)naphthalene-2,7-disulfonate; Lanasol Black B; Sumifix Black B; Drimarene Black B; Levafix Black EB
EINECS	Contact for details

Quality Control

Our tetrasodium (3Z)-5-amino-4-oxo-6-[4-(2-sulfonatooxyethylsulfonyl)phenyl]diazenyl-3-[[4-(2-sulfonatooxyethylsulfonyl)phenyl]hydrazinylidene]naphthalene-2,7-disulfonate is produced under a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and performance as required by the textile dye industry. Comprehensive Certificates of Analysis (COA) detailing purity, impurity profile, and physical specifications are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure containers are kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark blue to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 90%
Color Strength	100% ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Completely soluble
pH (1% Solution)	6.0 - 8.0

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