Description

C.I. Reactive Black 19 is a high-performance, bifunctional reactive dye belonging to the vinyl sulfone and chlorotriazine class, known for its deep black shade and excellent fastness properties. It is a critical component for achieving durable, wash-fast coloration on cellulosic fibers like cotton, viscose, and linen. This product is essential for textile manufacturers and dye houses requiring reliable, consistent, and vibrant black hues for apparel, home textiles, and industrial fabrics. Its bifunctional nature offers superior fixation rates and reduced environmental impact through efficient dye utilization.

Application

• Exhaust dyeing of cotton and cotton-blended fabrics and yarns.
• Continuous pad-steam and pad-batch dyeing processes for woven and knitted cellulosics.
• Dyeing of regenerated cellulose fibers such as viscose, lyocell, and modal.
• Production of dark shades for denim, workwear, and home textiles like curtains and upholstery.
• Used in combination with other reactive dyes to build complex, deep black and navy shades.
• Application in textile printing pastes for sharp, defined prints with good wash fastness.

Basic Information

Item	Detail
Product Name	C.I. Reactive Black 19
CAS No.	12270-65-4
Molecular Formula	C26H21N5O19S6.xNa
Molecular Weight	Contact for details
Synonyms	Reactive Black 19; Reactive Black B; Reactive Black KN-B; C.I. 12270-65-4; Remazol Black B; Levafix Black EB; Procion Black H-EXL; Dianix Black S-EX; Vinylsulfone/Triazine Reactive Dye; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3,6-bis((4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-, sodium salt (1:?); Bifunctional Reactive Black Dye
EINECS	Contact for details

Quality Control

Our C.I. Reactive Black 19 is manufactured under a strict quality management system. Every batch is tested to ensure consistent shade, strength, solubility, and fixation properties. Key parameters such as color strength, hue, and content of hydrolyzed dye are rigorously controlled. A Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with each shipment to guarantee it meets your specific application requirements.

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 and excessive heat. The product is hygroscopic (moisture-sensitive); ensure the original packaging is resealed tightly after use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Black powder or granules
Color Strength	Standard: 100% ± 3%
Solubility in Water	≥ 100 g/L (at 50°C)
pH (1% Solution)	5.0 - 7.0
Moisture Content	≤ 5.0%
Dusting Property	Low dusting
Fixation Rate	≥ 70% (Standard exhaust dyeing)
Fastness Properties	Wash: 4-5; Light: 5-6; Rubbing: 4 (Typical on cotton)

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