Description

C.I. Reactive Brown 23 is a reactive dye belonging to the azo chemical class, designed to form covalent bonds with cellulosic fibers for excellent wash and light fastness. This compound is valued for its ability to produce rich, durable brown shades in industrial dyeing processes. It is primarily used by textile manufacturers and dye houses specializing in cotton, viscose, and other natural fiber substrates.

Application

• Exhaust Dyeing of Cotton: For batch-wise dyeing processes to achieve uniform and deep brown coloration.
• Continuous Pad-Dyeing of Fabrics: Applied in high-volume, continuous operations for textiles like denim and apparel fabrics.
• Yarn Dyeing for Home Textiles: Used for coloring yarns destined for towels, upholstery, and carpets.
• Garment Dyeing: Suitable for dyeing finished knitted or woven garments to meet specific color demands.
• Dyeing of Viscose/Rayon: Provides vibrant and fast colors on regenerated cellulose fibers.
• Industrial Fabric Production: For coloring fabrics used in workwear, uniforms, and technical textiles requiring color durability.

Basic Information

Product Name	C.I. Reactive Brown 23
CAS No.	71872-78-1
Molecular Formula	C31H19Cl2N9Na4O19S6
Molecular Weight	1225.86 g/mol
Synonyms	Reactive Brown 23; Reactive Brown K-4R; C.I. 18232; Reactive Brown H-4R; C.I. Reactive Brown 23; Reactive Brown KE4R; Levafix Brown E-4R; Remazol Brown R
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Brown 23 adheres to stringent quality protocols to ensure batch-to-batch consistency and performance in demanding textile applications. 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.

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 and moisture to maintain product integrity and shelf life.

Specification

Item	Specification
Appearance	Brown Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 7.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	5.5 - 7.5
Fixation Rate	≥ 70%
Fastness Properties (Typical)	Wash: 4-5, Light: 5-6

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