Description

C.I. Reactive Brown 11 is a high-performance, bifunctional reactive dye designed for covalent bonding with cellulosic fibers. This product matters for its excellent wash and light fastness properties, providing durable and vibrant brown coloration in demanding textile applications. It is primarily needed by manufacturers in the textile industry for dyeing and printing cotton, viscose, and other natural fibers, ensuring consistent batch-to-batch quality for global supply chains.

Application

This reactive dye is engineered for a range of commercial textile processes:

• Exhaust Dyeing of Cotton: For uniform coloration in jet, overflow, and beam dyeing machines.
• Continuous Pad-Dyeing: Suitable for pad-batch and pad-steam processes on woven and knitted fabrics.
• Textile Printing: Used in pigment printing formulations for sharp, defined patterns.
• Viscose and Rayon Dyeing: Provides good affinity and build-up on regenerated cellulose fibers.
• Yarn Dyeing: For coloring cotton or blended yarns intended for weaving or knitting.
• Garment Dyeing: Applicable for achieving fashionable, wash-down effects on finished apparel.

Basic Information

Product Name	C.I. Reactive Brown 11
CAS No.	12225-68-2
Molecular Formula	C31H19Cl3N9Na3O13S3
Molecular Weight	1047.37 g/mol
Synonyms	Reactive Brown 11; Reactive Brown K-4BR; C.I. 12225-68-2; Reactive Brown KE-4BR; Remazol Brilliant Brown 5R; Levafix Brown E-4BR; Drimarene Brown K-4BR; Dinazol Brown 4BR
EINECS	Contact for details

Quality Control

Our C.I. Reactive Brown 11 is manufactured under a strict quality management system. Every batch undergoes rigorous testing for critical parameters including color strength, shade, solubility, and fixation rate to ensure compliance with industry standards and consistent performance in your process. Certificates of Analysis (COA) documenting purity and physical-chemical specifications are 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. The product is hygroscopic (moisture-sensitive); ensure the original packaging is resealed tightly after use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Brown Powder
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	5.5 - 7.5
Fixation Rate	≥ 70%
Dusting Grade	Low Dusting
Identification (IR)	Conforms to Standard

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