Description

C.I.Reactive Black 13 is a high-performance, bifunctional reactive dye belonging to the azo chemical class. It is engineered for exceptional color fastness and covalent bonding with cellulosic fibers, ensuring vibrant, durable coloration. This product is essential for textile manufacturers and dye houses specializing in cotton, viscose, and other natural fiber dyeing processes where wash and light fastness are critical.

Application

• Exhaust Dyeing of Cellulosic Fibers: Primary application for dyeing cotton, rayon, linen, and hemp in jet, winch, and beam dyeing machines.
• Continuous Dyeing Processes: Used in pad-batch and pad-steam operations for uniform, large-scale fabric production.
• Textile Printing: Formulated for printing pastes to create sharp, defined patterns on cellulosic fabrics.
• Leather Coloring: Applied in the dyeing of leather goods where deep, stable black shades are required.
• Paper Staining: Utilized for specialty paper products requiring colorfast black pigmentation.
• Biomaterial Staining (Research Grade): Potential use in laboratory settings for histological staining applications.

Basic Information

Product Name	C.I. Reactive Black 13
CAS No.	12225-31-9
Molecular Formula	C31H19ClN7Na4O19S6
Molecular Weight	1137.86 g/mol
Synonyms	Reactive Black 13; Reactive Black B; C.I. 29225; Remazol Black B; Levafix Black EB; Procion Black H-EXL; Drimarene Black K-2B; Sumifix Black B; Vinylsulfone Azo Dye; 1,3,5-Triazine-2,4,6-triamine derivative dye
EINECS	Contact for details

Quality Control

Our production of C.I. Reactive Black 13 adheres to stringent quality management systems. Every batch is tested to ensure consistent shade, strength, solubility, and fixation properties. We provide comprehensive Certificates of Analysis (COA) detailing purity, inorganic salt content, and dye content specifications. Our quality commitment supports compliance with global standards including OEKO-TEX and REACH regulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The product is hygroscopic (moisture-sensitive); ensure containers are sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Dye Content	≥ 70% (Typical)
Strength (Relative)	100 ± 3%
Solubility in Water (50°C)	≥ 100 g/L
pH (1% Solution)	5.0 - 7.0
Moisture Content	≤ 5.0%
Inorganic Salt Content	≤ 30.0%
Shade on Cotton	Conforms to Standard
Fastness Properties (Wash, Light, Rub)	Grade 4-5 (Typical)

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