Description

C.I.Reactive Red 25 is a reactive dye belonging to the azo chemical class, widely used for its strong covalent bonding with cellulosic fibers. This compound is valued for producing bright, wash-fast red shades with excellent reproducibility in industrial dyeing processes. It is a critical component for textile manufacturers, paper colorants, and leather tanneries requiring durable coloration.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, and other cellulosic fibers in exhaust, pad-batch, and continuous dyeing processes.
• Paper Coloring: Used in the production of colored paper and paperboard where good bleed resistance is required.
• Leather Finishing: Imparts durable red color to leather goods in the tanning industry.
• Ink Formulation: A component in the manufacture of certain types of inks for specialized printing applications.
• Research & Development: Serves as a standard or intermediate in chemical research and analytical laboratories.

Basic Information

Product Name	C.I.Reactive Red 25
CAS No.	61969-20-8
Molecular Formula	C29H19ClN7Na3O11S3
Molecular Weight	915.12 g/mol
Synonyms	Reactive Red 25; Reactive Brilliant Red X-3B; C.I. 26110; Remazol Brilliant Red F3B; Levafix Brilliant Red E-3B; Procion Red H-3B; Drimarene Brilliant Red X-3B; Lanasol Red 3B
EINECS	Contact for details

Quality Control

Our production of C.I.Reactive Red 25 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, solubility, and fixation properties. Certificates of Analysis (COA) documenting purity, shade, and physical-chemical specifications are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Reddish-brown powder
Identification (IR)	Conforms to standard
Color Strength	≥ 100% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	≥ 50 g/L (at 50°C)
pH (1% Solution)	6.0 - 8.0
Fixation Rate	≥ 70% (on cotton)

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