Description

Reactive Red 201 is a high-performance, water-soluble reactive dye belonging to the azo dye class, specifically engineered for covalent bonding with cellulosic fibers. Its primary value lies in delivering brilliant, wash-fast red shades with excellent reproducibility and cost-effectiveness in industrial dyeing processes. This product is essential for textile manufacturers and dye houses specializing in cotton, viscose, and other natural fiber substrates, where consistent color yield and fastness properties are critical for quality assurance.

Application

• Exhaust dyeing of cotton and other cellulosic fibers in jet, overflow, and winch dyeing machines.
• Continuous pad-batch and pad-steam dyeing processes for woven and knitted fabrics.
• Printing applications on cellulosic textiles, offering sharp outlines and bright shades.
• Dyeing of viscose rayon and lyocell to achieve deep and even penetration.
• Used in the coloration of hemp, linen, and other natural cellulosic materials.
• Potential application in the research and development of new dye formulations and color matching.

Basic Information

Product Name	Reactive Red 201
CAS No.	106152-22-1
Molecular Formula	C31H19ClN7Na5O19S6
Molecular Weight	1241.41 g/mol
Synonyms	Reactive Red HE-3B; C.I. Reactive Red 201; Reactive Red HE3B; Red HE3B; Novacron Red HE-3B; Levafix Red E-3B; Remazol Red HE-3B; Sumifix Red HE-3B
EINECS	Contact for details

Quality Control

Our production of Reactive Red 201 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, solubility, fixation rate, and fastness properties. Certificates of Analysis (COA) detailing purity, shade, and specific application test results are available upon request to support your quality assurance and production planning.

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. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Dark Red Powder
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 7.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	5.5 - 7.5
Dusting Property	Low
Identification (HPLC/UV-Vis)	Conforms

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