Description

Reactive Red 49 is a high-purity, reactive azo dye belonging to the vinyl sulfone class, widely recognized for its excellent color fastness and brilliant red hue. Its primary value lies in its ability to form a strong covalent bond with cellulose fibers, ensuring vibrant, wash-fast coloration in textile dyeing and printing processes. This product is essential for manufacturers in the textile industry, particularly for dyeing cotton, viscose, and other cellulosic materials, as well as for research and development in specialty colorant applications.

Application

• Primary application in the exhaust dyeing of cotton and other cellulosic fibers.
• Used in continuous dyeing and printing processes for textiles.
• Suitable for dyeing viscose, linen, and hemp fabrics.
• Employed in the production of colored paper and specialty papers.
• Can be used for research and development of new dye formulations.
• Potential use in coloring leather and other natural materials.
• Applied in educational and laboratory settings for dye chemistry studies.

Basic Information

Product Name	Reactive Red 49
CAS No.	12237-02-4
Molecular Formula	C25H14Cl2N6Na2O11S3
Molecular Weight	819.54 g/mol
Synonyms	Reactive Red HE-3B; C.I. Reactive Red 49; Remazol Red 3B; Levafix Red E-3B; Procion Red HE-3B; Vinylsulfone Red 49; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(2-sulfo-4-vinylsulfonylphenyl)azo]-, sodium salt
EINECS	Contact for details

Quality Control

Our Reactive Red 49 is manufactured under strict quality management systems to ensure batch-to-batch consistency and high performance. The product undergoes rigorous testing, including assessment of color strength, solubility, and reactive group content, to meet the demanding standards of the textile industry. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment and is 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). Keep away from strong oxidizing agents and incompatible materials. The product is light-sensitive; prolonged exposure to direct light should be avoided to maintain stability and color value.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Color Strength	≥ 98% (Standard)
Assay (HPLC)	≥ 85%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Shade on Cotton	Conforms to standard pattern
Fastness Properties	Meets commercial requirements

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