Description

Reactive Blue 181 is a high-performance, fiber-reactive dye belonging to the vinyl sulfone class, known for its excellent color fastness and brilliant blue shade. It is a critical component for achieving deep, wash-resistant colors on cellulosic fibers like cotton and viscose. This product is essential for textile manufacturers, dye houses, and chemical distributors serving the global fabric and garment industry. Its reliable performance makes it a preferred choice for applications requiring consistent quality and vibrant results.

Application

• Primary dyeing and printing of cotton fabrics.
• Coloration of viscose (rayon) and other regenerated cellulosic fibers.
• Used in exhaust, pad-batch, and continuous dyeing processes in the textile industry.
• Ideal for producing deep navy to royal blue shades with high wet fastness.
• Applicable in the production of home textiles (e.g., bed linens, curtains) and apparel.
• Suitable for use in formulations for industrial inkjet printing on textiles.

Basic Information

Product Name	Reactive Blue 181
CAS No.	126601-88-5
Molecular Formula	C29H19ClN7O11S3
Molecular Weight	804.10 g/mol
Synonyms	Reactive Blue H-EGL; C.I. Reactive Blue 181; Remazol Brilliant Blue BB; Levafix Blue CA; Drimarene Blue K-2B; Kayacion Blue E-SE; Procion Blue H-EGN; Vinylsulfone Reactive Blue 181
EINECS	Contact for details

Quality Control

Our Reactive Blue 181 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and reactive group content. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and application performance is provided with every shipment to guarantee it meets the specifications required for industrial textile dyeing.

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 heat sources and incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Blue to Navy Blue Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	5.5 - 7.5
Dusting Property	Low

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