Description

Tetrasodium 4-amino-6-[[2,5-dimethoxy-4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]-5-hydroxy-3-[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonate is a high-purity, water-soluble reactive dye intermediate of significant commercial importance. This compound is engineered to deliver exceptional color strength and covalent bonding properties with cellulosic and polyamide fibers. It is primarily needed by manufacturers in the textile, ink, and specialty coatings industries seeking to produce vibrant, wash-fast colors.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-performance reactive dyes for cotton, viscose, and other cellulosic fibers.
• Textile Printing and Dyeing: Used in formulations for exhaust dyeing, continuous dyeing, and printing processes requiring excellent wet fastness.
• Inkjet Inks: Serves as a colorant precursor for producing inks with high optical density and stability for digital textile printing.
• Leather Coloring: Applied in the dyeing of leather goods to achieve deep, uniform, and durable coloration.
• Paper Dyeing: Utilized in the production of colored paper and paperboard where color fastness is required.
• Research & Development: Acts as a critical building block in chemical R&D for developing novel chromophores and functional dyes.

Basic Information

Product Name	Tetrasodium 4-amino-6-[[2,5-dimethoxy-4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]-5-hydroxy-3-[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]naphthalene-2,7-disulphonate
CAS No.	84229-70-9
Molecular Formula	C34H28N6Na4O22S6
Molecular Weight	~1194.9 g/mol (Contact for exact details)
Synonyms	Reactive Black 5 Tetrasodium Salt; C.I. Reactive Black 5; Remazol Black B; Tetrasodium 8-[[4-[[2-(Sulfooxy)ethyl]sulfonyl]-2-methoxyphenyl]azo]-7-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-1,3,6-naphthalenetrisulfonate; Vinylsulfone Reactive Dye Intermediate; Azo Reactive Dye Intermediate; 84229-70-9; Tetrasodium 4-Amino-5-hydroxy-3,6-bis[[4-[(2-sulfooxyethyl)sulfonyl]phenyl]azo]-2,7-naphthalenedisulfonate
EINECS	Contact for details

Quality Control

Our production of this reactive dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye synthesis. A Certificate of Analysis (COA) detailing purity, strength, and impurity profiles is provided with each shipment to guarantee batch-to-batch consistency and performance.

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 product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
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)	6.0 - 8.0
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.