Description

Reactive Red Brown K-B3R is a high-performance reactive dye designed for the covalent bonding of color to cellulosic fibers. This product matters for manufacturers seeking durable, wash-fast, and vibrant brown shades in textile applications. Industries that need it include textile mills and dye houses specializing in cotton, viscose, and other cellulose-based fabrics, where consistent color yield and fastness properties are critical.

Application

• Exhaust dyeing of cotton yarns and fabrics.
• Pad-batch and pad-steam continuous dyeing processes for cellulosics.
• Coloration of viscose rayon and other regenerated cellulose fibers.
• Used in the production of home textiles requiring high colorfastness.
• Applicable in garment dyeing for consistent and level shades.
• Potential use in the dyeing of blended fabrics containing cellulose components.

Basic Information

Product Name	Reactive Red Brown K-B3R
CAS No.	12225-66-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Reactive Brown K-B3R; C.I. Reactive Brown 9; Reactive Brown KBR; Reactive Dye Brown K-B3R; DyStar Reactive Red Brown K-B3R; Levafix Brown E-B3R (potential analog); Remazol Brown B3R (potential analog)
EINECS	Contact for details

Quality Control

Our Reactive Red Brown K-B3R is manufactured under a stringent quality management system. Every batch undergoes rigorous testing to ensure compliance with industry standards for reactive dyes, including assessments of color strength, shade, solubility, and fixation properties. Certificates of Analysis (COA) detailing batch-specific results 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 incompatible materials and moisture to maintain product stability and performance.

Specification

Item	Specification
Appearance	Brown Powder
Color Strength	Standard Depth ± 5%
Solubility (50°C)	≥ 100 g/L
Fixation Rate	≥ 70%
Moisture Content	≤ 5%
pH (1% Solution)	6.0 - 8.0
Fastness Properties (Typical)	Wash: 4-5; Light: 5-6; Rubbing: 4

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