Description

Reactive Blue 235 is a high-performance, vinyl sulfone-based reactive dye designed for the coloration of cellulosic fibers. Its primary value lies in its excellent wash and light fastness properties, ensuring vibrant and durable blue shades in demanding applications. This product is essential for textile manufacturers, particularly those specializing in cotton, viscose, and other cellulose-based fabrics, seeking reliable and consistent dyeing results.

Application

• Primary application in the exhaust dyeing of cotton yarn and knitted fabrics.
• Used in the continuous dyeing processes for woven cellulose textiles.
• Ideal for producing deep and brilliant blue shades with high color yield.
• Suitable for dyeing in combination with other reactive dyes to achieve a wide spectrum of colors.
• Applied in the textile printing industry for creating sharp and fast prints.
• Commonly used for dyeing cellulosic blends with polyester or other synthetic fibers.

Basic Information

Product Name	Reactive Blue 235
CAS No.	149315-82-2
Molecular Formula	C29H19ClN7O11S3·Na2
Molecular Weight	882.09 g/mol (Disodium salt)
Synonyms	C.I. Reactive Blue 235; Reactive Blue KN-R; Remazol Brilliant Blue R; Vinylsulfone Reactive Blue 235; Levafix Blue CA; 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, sodium salt (1:2); DyStar Reactive Blue 235
EINECS	Contact for details

Quality Control

Our Reactive Blue 235 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and fixation properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and application test results 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 incompatible materials. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Blue powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Shade	Within agreed tolerance vs. standard
Moisture Content	≤ 7.0%
Water Insoluble Matter	≤ 0.2%
pH (1% Solution)	6.0 - 8.0
Fixation Rate	≥ 70% (Standard conditions)

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