Description

C.I. Reactive Blue 25 is a high-purity, anthraquinone-based reactive dye designed for covalent bonding with cellulosic fibers. This compound is valued for its excellent wash and light fastness, providing a brilliant and durable blue coloration in demanding textile applications. It is primarily used by manufacturers in the textile dyeing and printing industries seeking consistent, high-quality colorants for cotton, viscose, and other natural fibers.

Application

• Exhaust Dyeing of Cellulosic Fibers: Primary application for dyeing cotton, rayon, linen, and hemp in batch processes.
• Continuous Dyeing Processes: Used in pad-batch and pad-steam operations for uniform fabric coloration.
• Textile Printing: Formulated into printing pastes for creating patterned designs on fabric.
• Industrial Fabric Production: Coloring of workwear, denim, home textiles, and other heavy-duty fabrics.
• Yarn Dyeing: For pre-dyed yarns intended for weaving or knitting.
• Leather Coloring: Used in some processes for dyeing leather goods.
• Paper Staining: Application in specialty paper production for colored papers.
• Research & Development: Serves as a standard or intermediate in chemical and dyestuff research.

Basic Information

Product Name	C.I. Reactive Blue 25
CAS No.	12236-87-2
Molecular Formula	C20H16N3Na3O11S3
Molecular Weight	695.54 g/mol
Synonyms	Reactive Blue 25; Reactive Blue K-GL; Remazol Brilliant Blue R; Drimarene Brilliant Blue R-B; Levafix Brilliant Blue E-B; Procion Brilliant Blue H-EG; C.I. 61211; Anthraquinone Blue, Reactive
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Blue 25 adheres to stringent quality management protocols. Every batch is tested against established specifications for color strength, hue, reactivity, and impurity profiles to ensure batch-to-batch consistency and performance reliability. Certificates of Analysis (COA) documenting purity, physical properties, and application performance are available upon request.

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. The product is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Dark Blue Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Shade on Cotton	Conforms to Standard
Fastness Properties	Conforms to Industry Standards

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