Description

C.I.Reactive Black 3 is a reactive azo dye belonging to the important class of bifunctional reactive dyes, known for its ability to form covalent bonds with cellulosic fibers. This compound matters for its excellent wash and light fastness properties, providing durable and vibrant black coloration in demanding textile applications. Industrial users in the textile dyeing and printing sectors, particularly those working with cotton, viscose, and other cellulose-based materials, rely on this dye for its reliable performance and strong fixation.

Application

• Exhaust Dyeing of Cellulosic Fibers: Primary application for dyeing cotton, rayon, linen, and other plant-based textiles in jet, beck, and beam dyeing machines.
• Continuous Dyeing Processes: Used in pad-batch and pad-steam operations for efficient, large-scale coloration of woven and knitted fabrics.
• Textile Printing: Employed in the production of printed textiles, offering sharp outlines and good color yield on cellulose substrates.
• Leather Coloring: Applied in the dyeing of leather goods where reactive properties can enhance color fastness.
• Paper Staining: Suitable for specialty paper products requiring high color stability.
• Biomaterial Staining: Potential use in laboratory settings for histological staining due to its reactive nature.

Basic Information

Product Name	C.I. Reactive Black 3
CAS No.	12236-78-1
Molecular Formula	C26H21N5O19S6.4Na
Molecular Weight	Contact for details
Synonyms	Reactive Black 3; Reactive Black K-BG; C.I. 20505; Remazol Black B; Levafix Black E-B; Procion Black H-EXL; Dinazol Black B; Vinylsulphone Azo Dye; 1,3,5-Triazine-2,4,6-triamine derivative reactive dye; Tetrasodium 4-amino-5-hydroxy-3,6-bis((4-((2-(sulfonatooxy)ethyl)sulfonyl)phenyl)diazenyl)naphthalene-2,7-disulfonate
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Black 3 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability for industrial dyeing. Each lot is analyzed for critical parameters including dye content, shade, solubility, and reactive group stability. Certificates of Analysis (COA) documenting purity, strength, and application performance are available upon request to support your quality assurance and production planning.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled 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 to Bluish-Black Powder
Identification (IR)	Conforms
Dye Content	≥ 80%
Shade	Standard Black
Solubility in Water	≥ 100 g/L (50°C)
pH (1% Solution)	5.0 - 7.0
Moisture Content	≤ 5.0%
Fixation Rate	≥ 70%

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