Description

C.I. Reactive Blue 72 is a high-performance, water-soluble reactive dye belonging to the vinyl sulfone class, widely recognized for its brilliant blue hue and excellent fastness properties. Its primary value lies in forming a strong covalent bond with cellulose fibers, ensuring outstanding wash and light fastness in the final textile product. This dye is essential for manufacturers in the textile industry, particularly for dyeing and printing cotton, viscose, and other cellulosic fabrics where vibrant, durable coloration is required.

Application

• Exhaust Dyeing of Cotton: Used in batch dyeing processes for yarn, knits, and woven fabrics, offering high fixation and reproducibility.
• Continuous Dyeing: Applied in pad-batch and pad-steam processes for efficient, large-scale production of dyed cellulosic materials.
• Textile Printing: Formulated into printing pastes for creating sharp, wash-fast patterns on cotton and viscose garments and home textiles.
• Union Dyeing: Effective for dyeing blends of cotton with polyester or nylon when used in appropriate combination dyeing processes.
• Leather Coloring: Employed in the dyeing of leather goods where reactive dyes are specified for improved fastness.
• Paper Dyeing: Used for coloring high-quality papers where water-fastness is a critical requirement.

Basic Information

Product Name	C.I. Reactive Blue 72
CAS No.	61968-93-2
Molecular Formula	C29H19ClN7Na4O19S6
Molecular Weight	1139.28 g/mol (as sodium salt)
Synonyms	Reactive Blue 72; Reactive Blue H-ERD; C.I. 61211; Remazol Brilliant Blue R Special; Vinylsulfone Reactive Blue 72; Levafix Blue CA; Procion Blue H-ERD; 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:?); Reactive Blue H-ER 150%
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Blue 72 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as color strength, shade, solubility, and fixation rate are rigorously tested against established internal standards. Certificates of Analysis (COA) detailing purity, physical properties, and application performance are available upon request 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 room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the original container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark blue powder or granules
Color Strength	Standard depth ± 3%
Moisture Content	≤ 7.0%
Water Solubility (at 50°C)	≥ 100 g/L
pH (1% Solution)	5.5 - 7.5
Fixation Rate (on Cotton)	≥ 70%
Dusting Grade	Low-dusting grade available

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