Description

C.I. Reactive Red 18 is a high-purity, water-soluble reactive dye belonging to the azo chemical class, widely recognized for its vibrant red hue and excellent fastness properties. Its primary value lies in forming a strong covalent bond with cellulosic fibers, ensuring exceptional wash and light fastness for long-lasting coloration. This dye is essential for manufacturers in the textile industry, particularly for dyeing and printing cotton, viscose, and other natural fibers, as well as for research and development in color chemistry.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cotton, rayon, and other cellulosic fabrics.
• Textile Printing: Used in printing pastes for creating sharp, durable patterns on natural fiber textiles.
• Leather Coloring: Imparts color to leather goods where reactive properties are beneficial.
• Paper Staining: Employed for coloring paper products requiring good water fastness.
• Biomolecule Staining: Potential use in laboratory research for staining specific biological substrates.
• Ink Formulation: A component in specialty inks where reactive properties are needed for permanence.

Basic Information

Product Name	C.I. Reactive Red 18
CAS No.	61931-51-9
Molecular Formula	C26H21ClN7Na3O11S3
Molecular Weight	872.15 g/mol
Synonyms	Reactive Red 18; Reactive Brilliant Red X-3B; C.I. 18207; Remazol Brilliant Red X-3B; Levafix Brilliant Red E-4BA; Procion Red MX-5B; Drimarene Brilliant Red X-3B; Vinylsulfone Reactive Dye Red 18
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Red 18 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested for critical parameters including color strength, hue, solubility, and reactive group content to meet precise industrial specifications. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment to support your quality assurance processes.

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). This product is hygroscopic (moisture-sensitive); the original container must be kept sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Red Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	6.0 - 8.0
Shade	Conforms to Standard
Fastness Properties	Contact for details

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