Description

Reactive Black 9 is a high-purity, reactive dye belonging to the azo dye class, identified by CAS No. 12225-27-3. It is valued for its strong covalent bonding to cellulosic fibers, providing excellent wash and light fastness properties. This product is essential for manufacturers in the textile industry seeking durable and vibrant black shades on cotton, viscose, and other natural fibers.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cellulosic fibers like cotton, rayon, and linen to achieve deep black shades.
• Textile Printing: Used in printing pastes for direct and discharge printing on natural fiber fabrics.
• Leather Coloring: Employed in the dyeing of leather goods where high color fastness is required.
• Paper Staining: Suitable for coloring paper products where a strong, reactive black color is needed.
• Research & Development: Serves as a standard or intermediate in chemical research and quality control laboratories.
• Industrial Colorant: Potential use in the coloration of other hydroxyl-group-containing materials.

Basic Information

Product Name	Reactive Black 9
CAS No.	12225-27-3
Molecular Formula	C26H21N5Na4O19S6
Molecular Weight	991.80 g/mol
Synonyms	Reactive Black B; C.I. Reactive Black 9; Remazol Black B; Levafix Black E-B; Procion Black H-EXL; Dinazol Black B; Black B Reactive Dye; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-6-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our Reactive Black 9 is manufactured under a stringent quality management system. Every batch is tested to ensure consistent strength, shade, and reactivity, meeting specifications for key parameters such as dye content, solubility, and fixation rate. Certificates of Analysis (COA) documenting purity and performance characteristics are available upon request.

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 hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Identification (IR)	Conforms to Standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
pH (1% Solution)	5.0 - 7.0
Shade & Strength	Within 5% of Standard
Fixation Rate	Min. 70%

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