Description

Reactive Green 21 is a high-purity, light-sensitive reactive dye belonging to the anthraquinone class. This compound is valued for its ability to form covalent bonds with cellulosic and protein fibers, providing excellent wash and light fastness properties. It is primarily used by manufacturers in the textile, leather, and specialty paper industries for dyeing and printing applications where vibrant green shades are required.

Application

• Primary dyeing of cotton, viscose, and other cellulosic textiles.
• Printing applications on natural and synthetic fabrics.
• Coloration of leather goods and specialty leather finishes.
• Dyeing of paper pulp for decorative and specialty papers.
• Research and development of novel dye-polymer conjugates.
• As a colorimetric reagent or stain in certain laboratory and diagnostic applications.

Basic Information

Product Name	Reactive Green 21
CAS No.	61969-09-3
Molecular Formula	C₃₁H₂₀ClN₇O₁₀S₂·xNa
Molecular Weight	Contact for details
Synonyms	Reactive Green HE-4BD; C.I. Reactive Green 21; Reactive Green HE4B; Remazol Turquoise Blue G; Levafix Turquoise Blue E-G; Procion Green HE-4BD; Drimarene Turquoise K-2B; Anthraquinone, 1-amino-4-[[4-[(2,5-disulfophenyl)amino]-6-fluoro-1,3,5-triazin-2-yl]amino]-9,10-dihydro-9,10-dioxo-; 1-Amino-4-[[4-[(2,5-disulfophenyl)amino]-6-fluoro-1,3,5-triazin-2-yl]amino]anthraquinone-9,10-dione
EINECS	Contact for details

Quality Control

Our Reactive Green 21 is manufactured under a strict quality management system. Each batch is tested to ensure consistent shade, reactivity, and solubility performance. Key parameters including color strength, fixation rate, and impurity profile are verified. A Certificate of Analysis (COA) documenting these results is provided with every shipment to guarantee compliance with your technical 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. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark green to blue-green powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 7.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	5.5 - 7.5
Shade	Conforms to standard
Fixation Rate	≥ 70%

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