Description

C.I. Reactive Brown 7 is a synthetic reactive dye belonging to the azo dye class, widely used for coloring cellulosic fibers. Its primary value lies in its ability to form a covalent bond with the fiber substrate, resulting in excellent wash and light fastness properties. This product is essential for textile manufacturers and dye houses seeking durable, vibrant brown shades on cotton, viscose, and other natural fabrics.

Application

• Primary dyeing of cotton fabrics and yarns.
• Coloration of viscose (rayon) and other regenerated cellulosic materials.
• Used in exhaust dyeing processes for batch production.
• Suitable for continuous dyeing and pad-batch applications.
• Can be applied in combination with other reactive dyes to achieve a wide spectrum of brown and earth-tone shades.
• Common in the production of apparel, home textiles (like towels and bedsheets), and industrial fabrics requiring colorfastness.

Basic Information

Product Name	C.I. Reactive Brown 7
CAS No.	12225-64-8
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Reactive Brown 7; Reactive Brown K-4BR; C.I. 18714; Reactive Brown KE4B; Cibacron Brown 4BR; Levafix Brown E-4B; Procion Brown H-4BR; Remazol Brown 4BR
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Brown 7 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested for critical parameters including shade, strength, solubility, and fixation properties. Certificates of Analysis (COA) documenting these results 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 and incompatible materials.

Specification

Item	Specification
Appearance	Brown Powder
Color Strength	Standard Depth ± 3%
Solubility in Water	≥ 50 g/L (at 50°C)
Moisture Content	≤ 7.0%
pH Value (1% Solution)	5.5 - 7.5
Fixation Rate	≥ 70%
Dusting Property	Low

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