Description

Reactive Red 261 is a high-performance, water-soluble azo dye belonging to the reactive dye class, designed for covalent bonding with textile fibers. Its primary value lies in providing excellent wash and light fastness properties, ensuring vibrant and durable coloration. This product is essential for industrial textile manufacturers, particularly in the dyeing and printing of cellulosic fibers like cotton and viscose, where consistent color yield and process reliability are critical.

Application

• Exhaust Dyeing of Cotton: For batch dyeing processes requiring deep, level shades with high fixation efficiency.
• Continuous Dyeing: Applied in pad-batch and pad-steam processes for uniform coloration of woven and knitted fabrics.
• Textile Printing: Used in pigment printing formulations for sharp, well-defined patterns on cellulosic substrates.
• Viscose and Linen Dyeing: Provides bright, saturated red shades on regenerated and natural cellulosic fibers.
• Industrial Yarn Dyeing: Suitable for dyeing sewing threads and other industrial yarns where color consistency is paramount.
• Blend Fabric Application: Can be used in formulations for dyeing cotton-polyester blends with appropriate dye selections.

Basic Information

Product Name	Reactive Red 261
CAS No.	80156-96-3
Molecular Formula	C31H19ClN7Na4O19S6
Molecular Weight	Contact for details
Synonyms	Reactive Red HE-3B; C.I. Reactive Red 141; Reactive Red HE3B; Red HE3B; Reactive Red M-3BE; Levafix Red CA; Remazol Red 3BS; Dianix Red AC-E; Kayacion Red P-2BN; Sumifix Red 3BF
EINECS	Contact for details

Quality Control

Our Reactive Red 261 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive testing, including strength, shade, solubility, and fixation rate analysis. A Certificate of Analysis (COA) detailing purity, physical properties, and application performance is provided with every shipment to guarantee it meets your specific technical requirements.

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 after each use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 7.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	5.5 - 7.5
Fixation Rate	≥ 70%
Dusting Grade	Low Dusting

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