Description

Reactive Yellow 18 is a high-purity, water-soluble anionic dye belonging to the reactive azo dye class, identified by CAS NO 12226-48-1. It is valued for its excellent color fastness, bright hue, and strong covalent bonding with cellulosic fibers, ensuring vibrant and durable coloration. This product is essential for manufacturers in the textile industry seeking reliable and efficient dyes for cotton, viscose, and other natural fiber applications.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cotton, linen, and viscose rayon fabrics.
• Yarn Dyeing: Used for coloring natural fiber yarns in hank, package, or beam dyeing processes.
• Garment Dyeing: Suitable for dyeing finished cotton garments to achieve uniform and fast colors.
• Printing Pastes: Formulated into printing pastes for textile printing applications on cellulosic materials.
• Leather Coloring: Employed in the dyeing of leather goods where reactive properties are beneficial.
• Paper Staining: Used for tinting and coloring paper products requiring good water fastness.

Basic Information

Product Name	Reactive Yellow 18
CAS No.	12226-48-1
Molecular Formula	C25H19ClN7Na3O11S3
Molecular Weight	872.09 g/mol
Synonyms	Reactive Yellow H-E4R; C.I. Reactive Yellow 18; Reactive Brilliant Yellow H-E4R; Yellow H-E4R; Triazinyl Yellow Dye; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)azo]-, trisodium salt; Reactive Yellow HE4R
EINECS	Contact for details

Quality Control

Our Reactive Yellow 18 is manufactured under a strict quality management system. Every batch undergoes rigorous testing for key parameters including color strength, shade, solubility, and fixation rate to ensure consistency and performance. Certificates of Analysis (COA) confirming compliance with industry specifications 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.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Shade	Within agreed tolerance
Moisture Content	≤ 5.0%
Water Solubility	≥ 100 g/L (at 50°C)
Fixation Rate	≥ 70%
pH (1% Solution)	6.0 - 8.0
Insoluble Matter	≤ 0.1%

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