Description

Reactive Green 19 is a high-purity, reactive dye belonging to the chlorotriazine class, designed for covalent bonding to hydroxyl and amino groups. This compound matters for its excellent color fastness, bright green hue, and strong reactivity, which are critical for achieving durable coloration in demanding applications. It is primarily needed by manufacturers in the textile, leather, and paper industries seeking to produce vibrant, wash-resistant green shades on cellulosic and protein-based fibers.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, linen, and other cellulosic fibers to achieve brilliant green shades with high wet fastness.
• Leather Coloring: Used in the tanning industry for coloring leather goods, providing rich color and good penetration.
• Paper Staining: Employed in the production of specialty papers, decorative papers, and security papers requiring color stability.
• Biomolecule Labeling: Utilized in biochemical research as a fluorescent label or tracer for proteins and other biomolecules due to its reactive group.
• Wood Staining: Applied in the staining of wood and wood-based products for decorative purposes.
• Ink Formulation: A component in the manufacture of certain types of inks for industrial printing.

Basic Information

Product Name	Reactive Green 19
CAS No.	61931-49-5
Molecular Formula	C₄₀H₂₃Cl₂N₁₅Na₄O₁₉S₆
Molecular Weight	1416.94 g/mol
Synonyms	Reactive Green 19; C.I. Reactive Green 19; Reactive Green KE4B; Levafix Green E-4B; Procion Green H-4B; Remazol Green GG; C.I. 205045; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[4-[[4-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-7-sulfo-1-naphthalenyl]azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our Reactive Green 19 is manufactured under a strict quality management system. Each batch undergoes rigorous testing to ensure it meets high standards for color strength, purity, and reactivity. Key parameters such as assay, shade, solubility, and heavy metal content are verified. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee batch-to-batch consistency and compliance with your specifications.

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 and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Dark green powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 90%
Color Strength	100 ± 3% (vs. Standard)
Solubility in Water	Clear solution
Moisture Content	≤ 5.0%
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.