Description

Reactive Brown 10 is a high-purity, reactive dye belonging to the azo dye class, identified by CAS No. 12225-67-1. It is specifically engineered for covalent bonding with cellulosic fibers, offering excellent wash and light fastness properties. This product is essential for textile manufacturers and dye houses seeking vibrant, durable brown shades on cotton, viscose, and other natural fabrics.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cellulosic fibers like cotton, rayon, and linen.
• Fabric Printing: Used in printing pastes for creating patterned textiles with high color yield and sharpness.
• Leather Coloring: Imparts rich, stable brown colors to leather goods in tanneries.
• Paper Staining: Employed for coloring specialty papers and paper products requiring good water resistance.
• Biomolecule Staining: Potential use in laboratory settings for staining biological specimens in histology.
• Research & Development: Serves as a key intermediate or reference standard in chemical synthesis and dye research.

Basic Information

Product Name	Reactive Brown 10
CAS No.	12225-67-1
Molecular Formula	C31H19ClN7Na4O19S6
Molecular Weight	1131.31 g/mol
Synonyms	Reactive Brown K-4BR; C.I. Reactive Brown 10; Reactive Brown K4BR; 4BR Brown; Brown 4BR; Levafix Brown E-4BR; Remazol Brilliant Brown 4BR; Sumifix Supra Brown 4BR
EINECS	Contact for details

Quality Control

Our Reactive Brown 10 is manufactured under a strict quality management system. Every batch undergoes comprehensive testing for key parameters including color strength, shade, solubility, and reactive group content to ensure batch-to-batch consistency and performance reliability. Certificates of Analysis (COA) detailing purity, physical properties, and application performance 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 and incompatible materials. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Brown Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 7.0%
Water Insoluble Matter	≤ 0.5%
Dye Content	≥ 70.0%
pH (1% Solution)	6.0 - 8.0
Shade	Conforms to Standard
Fastness Properties (on Cotton)	Wash: 4-5, Light: 5-6

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