Description

C.I. Reactive Blue 28 is a high-performance, anthraquinone-based reactive dye designed for permanent coloration of cellulosic fibers. Its core value lies in its excellent wash and light fastness properties, ensuring vibrant and durable shades in demanding textile applications. This product is essential for manufacturers in the textile industry, particularly for dyeing and printing cotton, viscose, and other natural fibers. It offers reliable performance in exhaust, pad-batch, and continuous dyeing processes.

Application

• Exhaust Dyeing of Cotton: For dyeing yarns, knits, and woven fabrics in jet, overflow, and winch machines.
• Continuous Dyeing of Cellulosics: Used in pad-steam and pad-dry-chemical pad-steam processes for uniform coloration.
• Textile Printing: Formulated for screen and roller printing applications on cotton and viscose substrates.
• Pad-Batch Dyeing: Ideal for cold pad-batch processes, offering energy efficiency and simplicity.
• Union Dyeing: Can be applied in combination with other dye classes for dyeing cotton components in cotton/polyester blends.
• Leather Coloring: Used for dyeing leather where reactive fixation to protein fibers is required.
• Paper Staining: Employed for coloring specialty papers where high wet fastness is needed.

Basic Information

Product Name	C.I. Reactive Blue 28
CAS No.	12225-45-5
Molecular Formula	C32H22ClN7Na4O16S4
Molecular Weight	1084.28 g/mol
Synonyms	Reactive Blue 28; Reactive Blue K-GL; Remazol Brilliant Blue R; Levafix Blue RA; Drimarene Blue K-2B; C.I. 61205; Anthraquinone blue reactive dye; 1-Amino-4-[3-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-sulfophenyl]amino-9,10-dihydro-9,10-dioxo-2-anthracenesulfonic acid, tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Blue 28 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, shade, solubility, and fixation properties. Certificates of Analysis (COA) detailing purity, physical properties, and application test results are available upon request. We support compliance with global standards such as Oeko-Tex Standard 100 and REACH.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption and caking.

Specification

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

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