Description

Reactive Blue 2 is a reactive anthraquinone dye widely used for its brilliant blue hue and excellent fastness properties. Its primary value lies in its ability to form a covalent bond with cellulose fibers, ensuring superior wash and light fastness in textile applications. This product is essential for manufacturers in the textile dyeing and printing industries, particularly for cotton, viscose, and other cellulosic materials, where consistent color strength and process reliability are critical.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cotton, viscose, and other cellulosic fibers.
• Textile Printing: Used in printing pastes for creating sharp, wash-fast blue designs on cellulosic fabrics.
• Leather Coloring: Imparts a stable blue color to leather goods.
• Paper Staining: Employed for coloring specialty papers where high color fastness is required.
• Research & Development: Serves as a reference standard or intermediate in chemical synthesis and dye research.
• Biochemical Staining: Used in specific histochemical and biological staining protocols.

Basic Information

Product Name	Reactive Blue 2
CAS No.	12236-82-7
Molecular Formula	C29H20ClN7O11S3
Molecular Weight	782.15 g/mol
Synonyms	Reactive Blue 2; C.I. Reactive Blue 2; Procion Blue H-B; Remazol Brilliant Blue R; Levafix Brilliant Blue E-B; Drimarene Brilliant Blue R; Anthraquinone Blue Dye; 1-Amino-4-[3-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-4-sulfophenylamino]anthraquinone-2-sulfonic acid
EINECS	235-457-6

Quality Control

Our Reactive Blue 2 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance. Each lot is tested for critical parameters including color strength, hue, solubility, and reactive group content. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to guarantee it meets your specific application requirements.

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	Dark Blue Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Solubility	≥ 50 g/L (at 50°C)
pH (1% Solution)	6.0 - 8.0
Dye Content	≥ 70%

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