Description

2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-4-2-(sulfooxy)ethylsulfonylphenylazo-, reaction products with 2-amino-4-(4-amino-6-chloro-1,3,5-triazin-2-yl)amino-5-4-2-(sulfooxy)ethylsulfonylphenylazobenzenesulfonic acid, sodium salts is a high-performance, polyfunctional reactive dye intermediate. This compound is engineered to deliver exceptional color strength, wash-fastness, and covalent bonding to cellulosic fibers. It is primarily required by manufacturers in the textile and specialty chemical industries seeking to produce brilliant and durable shades. The product's complex structure enables the creation of advanced dyes with superior performance characteristics.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton, viscose, and other cellulosic fiber dyeing and printing.
• Textile Industry: For producing dyes that offer excellent exhaustion, fixation yield, and outstanding fastness properties to washing, light, and perspiration.
• Specialty Pigments: Can be utilized in the development of complex, high-stability pigments for niche applications.
• Research & Development: Serves as a critical reagent for R&D chemists developing new chromophores and dye systems with enhanced environmental or performance profiles.
• Ink Formulations: Potential use in the synthesis of colorants for specialized inkjet inks requiring high color purity and stability.

Basic Information

Product Name	2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-4-2-(sulfooxy)ethylsulfonylphenylazo-, reaction products with 2-amino-4-(4-amino-6-chloro-1,3,5-triazin-2-yl)amino-5-4-2-(sulfooxy)ethylsulfonylphenylazobenzenesulfonic acid, sodium salts
CAS No.	181531-25-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Red 268; Reactive Red 268; Sodium 4-amino-5-hydroxy-3-[4-[2-(sulfooxy)ethylsulfonyl]phenyl]azo-2,7-naphthalenedisulfonate condensed with 2-amino-4-[(4-amino-6-chloro-1,3,5-triazin-2-yl)amino]-5-[4-[2-(sulfooxy)ethylsulfonyl]phenyl]azobenzenesulfonate; Reactive Dye Intermediate RR268; Bis(vinylsulfone) type reactive dye intermediate; Polyazo reactive dye intermediate
EINECS	Contact for details

Quality Control

Our production of this reactive dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and performance reliability. Quality is verified through advanced analytical techniques including HPLC, spectrophotometry, and titration to confirm critical parameters such as purity, color strength, and reactive group content. A comprehensive Certificate of Analysis (COA) detailing all specification results is provided with each shipment.

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 performance.

Specification

Item	Specification
Appearance	Dark powder or granules
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	Min. 85% (as sodium salt)
Color Strength	95 - 105% (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.