Description

2,7-Naphthalenedisulfonic Acid, 4-Amino-6-5-(2-Bromo-1-Oxo-2-Propenyl)Amino-2-Sulfophenylazo-3-4-(Ethenylsulfonyl)Phenylazo-5-Hydroxy-, Trisodium Salt is a high-purity, reactive dye intermediate of significant commercial importance. This compound is engineered for applications requiring excellent color fastness and reactivity with various substrates. It is primarily needed by manufacturers in the textile, leather, and specialty ink industries for producing vibrant and durable colorants.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-performance reactive dyes for cotton, wool, and nylon fibers.
• Textile Coloration: Used in the production of dyes that form covalent bonds with cellulose, resulting in superior wash and light fastness.
• Leather Dyeing: Employed in formulating dyes for leather goods, providing deep, uniform, and durable coloration.
• Inkjet Inks: Serves as a precursor for colorants in high-quality digital textile printing inks.
• Paper Dyeing: Used in the coloration of specialty papers where high color strength and stability are required.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel chromophores and dye chemistry.

Basic Information

Product Name	2,7-Naphthalenedisulfonic Acid, 4-Amino-6-5-(2-Bromo-1-Oxo-2-Propenyl)Amino-2-Sulfophenylazo-3-4-(Ethenylsulfonyl)Phenylazo-5-Hydroxy-, Trisodium Salt
CAS No.	136213-71-3
Molecular Formula	C27H18BrN6Na3O14S4
Molecular Weight	~ 967.7 g/mol (Contact for exact details)
Synonyms	Reactive Black 5 Precursor; Trisodium 4-amino-6-[5-[(2-bromo-1-oxoprop-2-en-1-yl)amino]-2-sulfophenyl]azo-3-[4-(ethenylsulfonyl)phenyl]azo-5-hydroxy-2,7-naphthalenedisulfonate; C.I. Reactive Black 5 Intermediate; Azo Reactive Dye Intermediate; 4-Amino-5-hydroxy-6-[2-sulfo-4-[(2-bromoacryloyl)amino]phenyl]azo-3-[4-(vinylsulfonyl)phenyl]azo-2,7-naphthalenedisulfonic Acid Trisodium Salt; Vinylsulfone Azo Dye Intermediate; Bromoacrylamide Reactive Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and performance. Every lot is analyzed to confirm critical parameters such as purity, reactive group content, and impurity profile. A comprehensive Certificate of Analysis (COA) detailing specifications and test results is provided with each shipment to support your quality assurance processes.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark blue to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Solubility (in Water)	Clear solution at 1%
Heavy Metals (as Pb)	Max. 20 ppm
Sulfated Ash	Contact for details

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