Description

Reactive Black 1 CAS NO 12236-77-0 is a high-performance, bifunctional reactive dye belonging to the azo dye class, specifically engineered for covalent bonding with cellulosic fibers. This compound is critical for achieving deep, intense black shades with excellent wash and light fastness properties in textile dyeing and printing processes. It is an essential material for textile manufacturers, leather tanneries, and paper mills requiring durable, high-quality coloration.

Application

• Primary application in the exhaust dyeing of cotton, viscose, and other cellulosic fibers to produce deep black shades.
• Used in continuous dyeing and pad-batch processes for efficient, large-scale textile production.
• Employed in the printing of textiles and cellulosic fabrics to create sharp, durable patterns.
• Suitable for the dyeing of leather, providing rich, uniform black coloration.
• Application in the coloration of paper pulp for specialty papers.
• Can be used in research and development of new dye formulations and textile finishing processes.

Basic Information

Product Name	Reactive Black 1
CAS No.	12236-77-0
Molecular Formula	C26H21N5Na4O19S6
Molecular Weight	991.80 g/mol
Synonyms	Reactive Black 1; Reactive Black B; C.I. Reactive Black 1; Remazol Black B; Levafix Black E-B; Procion Black H-EXL; Dianix Black BG-FS; Kayacion Black P-N; Sumifix Black B; Vinylsulphone Azo Dye
EINECS	Contact for details

Quality Control

Our Reactive Black 1 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. The product undergoes comprehensive testing, including spectrophotometric strength determination, shade verification, solubility testing, and reactive group content analysis. Certificates of Analysis (COA) detailing purity, physical properties, and application performance are provided with every shipment.

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 moisture to maintain product integrity and shelf life.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Color Strength (Standard Depth)	100 ± 3%
Moisture Content	≤ 7.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	5.0 - 7.5
Dye Content	≥ 50%
Fixation Rate (on Cotton)	≥ 70%
Fastness Properties (Wash, Light, Rub)	Meet Commercial Standards

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