Description

Reactive Blue 238 is a high-performance, fiber-reactive dye belonging to the anthraquinone class, designed for covalent bonding with cellulosic fibers. Its primary value lies in delivering brilliant, wash-fast blue shades with excellent reproducibility and good all-around fastness properties. This dye is essential for textile manufacturers and dye houses specializing in the coloration of cotton, viscose, and other cellulose-based materials, where consistent quality and vibrant color are critical.

Application

• Primary application in the exhaust dyeing of cotton yarns and fabrics.
• Used in the continuous dyeing and pad-batch processes for cellulosic textiles.
• Ideal for producing medium to dark blue shades in apparel, home textiles, and industrial fabrics.
• Suitable for dyeing viscose (rayon) and linen to achieve high color strength.
• Can be applied in combination with other reactive dyes for creating a wide range of compound shades.

Basic Information

Product Name	Reactive Blue 238
CAS No.	149315-83-3
Molecular Formula	C29H19ClN7O11S2·xNa
Molecular Weight	Contact for details
Synonyms	Reactive Blue 238; C.I. Reactive Blue 238; Reactive Blue KE-R; Remazol Brilliant Blue R Spec.; Levafix Blue CA; Drimarene Blue K-2RL; Sumifix Supra Brilliant Blue BRF; Vinylsulfone Reactive Dye
EINECS	Contact for details

Quality Control

Our Reactive Blue 238 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each production lot is tested against key parameters including color strength, solubility, fixation rate, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and application performance is provided with every shipment.

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 and excessive heat. The product is hygroscopic (moisture-sensitive); ensure the original packaging is sealed after use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Blue Powder
Color Strength	100 ± 3% (Standard)
Moisture Content	≤ 5.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	5.5 - 7.5
Identification (IR)	Conforms to Standard
Fixation Rate	≥ 70%
Dusting Grade	Low Dusting

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