Reactive Blue 19 CAS 2580-78-1

What is Reactive Blue 19 CAS 2580-78-1?

Reactive Blue 19 CAS 2580-78-1 is a water-soluble monochlorotriazine dye that forms stable ether linkages with cellulose under alkaline conditions (pH 10–11), offering excellent wash and light fastness; it is one of the most commercially significant reactive dyes but poses environmental challenges due to its resistance to biodegradation and potential toxicity in wastewater.

Specification

Feature

• Physical Properties: Deep blue to violet-blue powder with a molecular weight of 626.37 g/mol, high water solubility (>100 g/L at 20°C), and a characteristic absorption maximum at ~592 nm; commercially available in liquid or granular forms with 60–80% active dye content.
• Chemical Reactivity: Features a monochlorotriazine anchor group for nucleophilic substitution with hydroxyl groups on fibers; undergoes hydrolysis in alkaline media if not fixed, forming an inactive hydroxy derivative; stable under acidic storage but sensitive to strong reducing agents.
• Synthesis: Synthesized by condensing bromamine acid with cyanuric chloride, followed by coupling with a phenylenediamine sulfonic acid derivative under controlled pH and temperature to yield the final reactive structure.
• Safety Profile: May cause skin and eye irritation; low acute toxicity (LD50 >2000 mg/kg oral, rat), but classified as harmful to aquatic organisms with long-lasting effects; requires protective handling and effluent treatment via adsorption, oxidation, or microbial processes.

Application

• Textile Dyeing: Extensively used in exhaust, continuous, and cold-pad-batch dyeing of cotton, viscose, and lyocell for apparel, towels, and denim, delivering rich navy shades with superior wet fastness and minimal bleeding.
• Printing: Applied in reactive printing pastes for sharp, vibrant blue patterns on cellulosic fabrics with high color yield and resistance to washing and light.
• Biochemical Research: Employed as a visible tracer in protein and enzyme studies, and as a model substrate in dye-decolorizing peroxidase (DyP) enzyme assays.
• Environmental Studies: Serves as a standard pollutant in research on advanced oxidation processes (AOPs), bioelectrochemical systems, and nanofiltration for textile wastewater treatment and dye recovery.

Packaging

Mikem offers flexible packaging options, including 25 kg of fiber drums for liquid products and 15–25 kg PP/PE bags for powder products, all customizable to meet your specific needs.