Description

Cloth Fast Black B is a high-performance, synthetic organic dye belonging to the category of direct or acid dyes, widely recognized for its excellent affinity to cellulosic and protein-based fibers. Its primary value lies in delivering deep, consistent black shades with superior fastness properties, including wash, light, and rub fastness, which are critical for durable textile coloration. This product is essential for manufacturers in the textile, leather, and paper industries seeking reliable and vibrant black dyes for their production processes.

Application

• Primary dyeing of cotton, viscose, and other cellulosic fabrics.
• Coloration of wool, silk, and nylon in the textile industry.
• Leather dyeing for footwear, apparel, and upholstery.
• Paper staining and tinting applications.
• As a colorant for specialty papers and non-woven materials.
• Potential use in the coloration of wood and basketware.

Basic Information

Product Name	Cloth Fast Black B
CAS No.	68348-77-6
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Direct Black B; C.I. Direct Black 166; Direct Deep Black EW; Amanil Fast Black B; Atlantic Fast Black B; Pyrazol Fast Black B; Sirius Black B; Diazol Black B
EINECS	Contact for details

Quality Control

Our Cloth Fast Black B is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters such as color strength, shade, solubility, and fastness properties. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance specifications is provided with every shipment to guarantee it meets the demanding standards of industrial applications.

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 incompatible materials. The container must be kept tightly closed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Color Strength	Standard Depth ± 5%
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Solubility in Water	Conforms
Shade	Conforms to Standard
Fastness to Washing	≥ 4-5 (Grey Scale)
Fastness to Light	≥ 5 (Blue Wool Scale)

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