Description

Reactive Brown 3 is a synthetic organic dye belonging to the reactive dye class, specifically designed to form covalent bonds with cellulosic fibers. Its primary value lies in providing excellent wash and light fastness properties, ensuring vibrant and durable coloration in demanding applications. This product is essential for manufacturers in the textile industry seeking high-performance, cost-effective dyeing solutions for cotton, viscose, and other natural fibers.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cellulosic fabrics like cotton, linen, and rayon.
• Yarn Dyeing: Used for coloring cotton and viscose yarns in package, beam, or hank dyeing machines.
• Garment Dyeing: Suitable for dyeing finished cotton garments to achieve uniform and fast colors.
• Printing Pastes: Formulated into printing pastes for direct and discharge printing on cellulose-based textiles.
• Leather Coloring: Applied in the dyeing of leather products where good fastness is required.
• Paper Staining: Used for specialty paper coloring where high color strength and affinity are needed.

Basic Information

Product Name	Reactive Brown 3
CAS No.	12217-08-2
Molecular Formula	C31H19ClN7Na5O19S6
Molecular Weight	1135.06 g/mol
Synonyms	Reactive Brown 3; C.I. Reactive Brown 3; Reactive Brown K-3R; C.I. 18215; Remazol Brilliant Brown 3R; Levafix Brown E-3R; Drimarene Brown K-3R; Sumifix Supra Brown 3RF
EINECS	Contact for details

Quality Control

Our Reactive Brown 3 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and fixation properties. A comprehensive 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. The product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Brown Powder
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 7.0%
Water Solubility	≥ 50 g/L (at 50°C)
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.