Description

C.I. Reactive Blue 3 is a reactive anthraquinone dye known for its bright blue color and covalent bonding properties with cellulosic fibers. This compound matters for its excellent wash and light fastness, providing durable coloration in demanding textile applications. It is primarily needed by manufacturers in the textile industry for dyeing and printing cotton, viscose, and other natural fibers, as well as for research and development in color chemistry.

Application

• Primary application in the exhaust dyeing of cotton and viscose fabrics and yarns.
• Used in the continuous dyeing and printing processes for cellulosic textiles.
• Employed in the coloration of leather and other protein-based materials.
• Suitable for paper coloration where reactive properties are beneficial.
• Acts as a colorant in research laboratories for developing new dyeing techniques.
• Used in educational settings for demonstrating reactive dye chemistry.
• Potential use as an intermediate for synthesizing more complex dye molecules.

Basic Information

Product Name	C.I. Reactive Blue 3
CAS No.	12239-37-1
Molecular Formula	C23H14Cl2N6O8S2
Molecular Weight	637.42 g/mol
Synonyms	Reactive Blue 3; Reactive Blue K-3R; Procion Blue H-3R; Cibacron Blue 3R-A; Levafix Blue RA; Remazol Brilliant Blue R (Note: often confused with a different structure, but listed as a common synonym); 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-dioxoanthracene-2-sulfonic acid
EINECS	Contact for details

Quality Control

Our C.I. Reactive Blue 3 is produced under a stringent quality management system. Every batch undergoes rigorous testing to ensure consistent shade, strength, and reactivity performance. Key parameters such as color strength, solubility, and fixation rate are verified against established standards. Certificates of Analysis (COA) documenting purity, physical properties, and application performance are available upon request to support your quality assurance protocols.

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 light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Blue powder
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	≥ 50 g/L (at 50°C)
pH (1% Solution)	6.0 - 8.0
Identification (IR)	Conforms to standard
Fixation Rate	≥ 70% (Standard conditions)
Dusting Property	Low dusting

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