Description

Reactive Blue 19 is a high-purity, anthraquinone-based reactive dye widely used in industrial textile applications. Its primary value lies in its ability to form a covalent bond with cellulose fibers, resulting in exceptional colorfastness, wash durability, and brilliant blue shades. This product is essential for manufacturers in the textile dyeing and printing industries, particularly for cotton, viscose, and other cellulosic materials. Consistent quality and reliable supply are critical for maintaining production efficiency and final product performance.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cotton, linen, rayon, and other cellulosic fabrics.
• Textile Printing: Used in printing pastes for creating sharp, wash-fast blue designs on cellulosic textiles.
• Leather Coloring: Imparts durable blue color to leather goods where reactive dye properties are beneficial.
• Paper Coloring: Employed for specialty paper products requiring high color stability.
• Biomolecule Staining: Used in research and diagnostic applications as a staining agent for proteins and other biomolecules in gel electrophoresis.
• Ink Formulation: A component in the manufacture of specialty inks where reactive properties are needed.

Basic Information

Product Name	Reactive Blue 19
CAS No.	2580-78-1
Molecular Formula	C₂₂H₁₆N₂Na₂O₁₁S₃
Molecular Weight	626.54 g/mol
Synonyms	Reactive Blue 19; Remazol Brilliant Blue R; C.I. Reactive Blue 19; Levafix Brilliant Blue E-BRA; Procion Brilliant Blue H-EG; Anthraquinone Blue 3GA; 1-Amino-4-[3-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-4-sulfophenylamino]-9,10-dihydro-9,10-dioxoanthracene-2-sulfonic acid disodium salt
EINECS	219-949-9

Quality Control

Our Reactive Blue 19 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance. Each lot is tested against comprehensive specifications, including color strength, hue, solubility, and reactive group content. A Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with every shipment to support your quality assurance protocols.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark blue powder
Identification (IR)	Conforms to standard
Color Strength	≥ 98% (vs. Standard)
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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