Description

C.I. Reactive Brown 26 is a high-performance, water-soluble reactive dye designed for the covalent bonding of cellulosic fibers. This product matters for manufacturers seeking durable, wash-fast brown colorations with excellent reproducibility and environmental profile. It is primarily needed by the textile industry for dyeing and printing cotton, viscose, and other natural fibers, offering a reliable solution for consistent batch-to-batch quality.

Application

• Exhaust dyeing of cotton yarn and knitted fabrics.
• Continuous pad-dyeing and pad-steam processes for woven cotton.
• Textile printing applications on cellulosic substrates.
• Garment dyeing for consistent and vibrant brown shades.
• Dyeing of viscose rayon and other regenerated cellulose fibers.
• Used in combination with other reactive dyes to achieve a wide spectrum of brown and olive shades.

Basic Information

Product Name	C.I. Reactive Brown 26
CAS No.	109223-59-8
Molecular Formula	C31H19ClN7O19S6·6Na
Molecular Weight	1331.37 g/mol (as sodium salt)
Synonyms	Reactive Brown 26; Reactive Brown K-4R; C.I. 18285; Reactive Brown KE4R; Reactive Brown M-4R; Novacron Brown S-4R; Remazol Brown RR; Levafix Brown E-4R
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Brown 26 adheres to stringent quality management systems to ensure product consistency and performance. Every batch is tested against key parameters including color strength, shade, solubility, and fixation properties. Certificates of Analysis (COA) detailing purity, physical properties, and application test results are available upon request 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 room temperature (15-25°C). Keep away from incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Brown powder
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 7.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	6.0 - 8.0
Identification (IR)	Conforms to standard
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.