Description

Reactive Brown 2 is a synthetic organic dye belonging to the reactive dye class, specifically designed for covalent bonding with textile fibers. Its primary value lies in producing durable, wash-fast brown shades on cellulosic materials like cotton and viscose. This product is essential for textile manufacturers and dye houses seeking reliable, vibrant coloration with excellent fastness properties. The compound is identified by CAS No. 12236-93-0.

Application

• Textile Dyeing: Primary application for dyeing cotton, linen, rayon, and other cellulosic fibers to achieve brown hues.
• Fabric Printing: Used in printing pastes for creating patterned brown designs on natural fiber fabrics.
• Leather Coloring: Employed in the dyeing of leather goods to provide consistent brown coloration.
• Paper Staining: Applicable for tinting paper products where colorfastness is required.
• Research & Development: Serves as a chemical intermediate or reference standard in dye chemistry research.
• Industrial Colorant: Potential use in coloring non-food industrial materials where a reactive brown dye is specified.

Basic Information

Item	Detail
Product Name	Reactive Brown 2
CAS No.	12236-93-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Brown 2; Reactive Brown K-4R; Reactive Brown K4R; Reactive Brown K-4RD; Levafix Brown E-4R; Remazol Brown RR; Drimarene Brown K-4R; C.I. 18205; Brown 2 Reactive Dye
EINECS	Contact for details

Quality Control

Our Reactive Brown 2 is manufactured under a strict quality management system. Each batch undergoes comprehensive testing to ensure it meets consistent performance standards for strength, shade, and reactivity. A Certificate of Analysis (COA) detailing parameters such as dye content, solubility, and fastness properties is provided to guarantee batch-to-batch reliability for your production processes.

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 container must be kept tightly closed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Brown Powder
Identification	Conforms (IR / TLC)
Dye Content	≥ 90%
Shade	Standard
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0
Fastness Properties (Typical)	Wash Fastness: 4-5; Light Fastness: 5-6

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