Description

C.I. Reactive Brown 12 is a high-performance, water-soluble azo-based reactive dye designed for covalent bonding with cellulosic fibers. This product is valued for its excellent wash and light fastness properties, ensuring vibrant and durable coloration in demanding textile applications. It is primarily used by textile manufacturers and dye houses specializing in cotton, viscose, and other cellulose-based materials to achieve consistent brown shades.

Application

• Exhaust dyeing of cotton yarns and fabrics.
• Continuous pad-batch and pad-steam dyeing processes for cellulosic textiles.
• Coloration of viscose (rayon) and linen.
• Used in the formulation of textile printing inks.
• Dyeing of paper pulp for specialty colored papers.
• Potential application in the dyeing of leather where reactive dyes are specified.

Basic Information

Product Name	C.I. Reactive Brown 12
CAS No.	12225-69-3
Molecular Formula	C31H19ClN7Na4O19S6
Molecular Weight	1131.37 g/mol
Synonyms	Reactive Brown 12; Reactive Brown K-4BR; C.I. 12225-69-3; Reactive Brown KE-4BR; Reactive Brown M-4BR; Levafix Brown E-4BR; Procion Brown H-4BR; Drimarene Brown K-4B
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Brown 12 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested for critical parameters including color strength, shade, solubility, and fixation properties. Certificates of Analysis (COA) detailing purity and performance specifications are available upon request to support your quality assurance 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. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Brown powder
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Solubility in Water	≥ 100 g/L (at 50°C)
Moisture Content	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Fixation Rate	≥ 70% (on cotton)
Identification (IR)	Conforms

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