Description

Reactive Red 50 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 critical for high-quality textile production. This dye is essential for manufacturers in the textile industry, particularly for dyeing and printing cotton, viscose, and other cellulosic fabrics, where consistent shade and performance are paramount.

Application

• Primary application in the exhaust dyeing of cotton and other cellulosic fibers.
• Used in continuous dyeing processes for fabrics and yarns requiring high color yield.
• Employed in the printing of textiles, including screen and rotary printing.
• Suitable for dyeing viscose rayon and linen to achieve a bright red shade.
• Can be applied in combination with other reactive dyes for creating a wide range of compound shades.
• Used in research and development laboratories for dye formulation and color matching.

Basic Information

Product Name	Reactive Red 50
CAS No.	12237-03-5
Molecular Formula	C25H14Cl2N6Na4O16S4
Molecular Weight	968.64 g/mol
Synonyms	Reactive Red HE-3B; C.I. Reactive Red 50; Remazol Red 3B; Levafix Red E-3B; Procion Red HE-3B; Reactive Red HE3B; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[2-methoxy-5-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our Reactive Red 50 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, solubility, and fixation properties. A comprehensive Certificate of Analysis (COA) detailing purity, shade, and physical-chemical specifications is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. The product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Reddish-brown powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.1%
pH (1% Solution)	6.0 - 8.0
Fixation Rate	≥ 70%
Shade	Conforms to standard

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