Description

C.I. Direct Black 146 is a high-performance, water-soluble direct dye belonging to the azo chemical class. It is valued for its excellent substantivity to cellulosic fibers, providing deep, economical black shades with good overall fastness properties. This dye is essential for manufacturers in the textile industry seeking reliable and cost-effective coloring solutions for cotton, viscose, and other regenerated fibers.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose rayon, and other cellulosic fibers in exhaust and continuous dyeing processes.
• Paper Coloring: Used for tinting and dyeing paper products where a deep black color is required.
• Leather Finishing: Employed in the dyeing of leather goods to achieve uniform black shades.
• Ink Formulation: A potential colorant for certain types of inks, particularly where water solubility is advantageous.
• Batch Dyeing of Yarn and Fabric: Ideal for package dyeing, beam dyeing, and jig dyeing operations for consistent results.
• Blend Dyeing: Can be used in combination with other direct dyes for shading and to achieve specific color targets on cellulosic materials.

Basic Information

Product Name	C.I. Direct Black 146
CAS No.	12221-96-4
Molecular Formula	C34H25N9Na4O13S4
Molecular Weight	1023.86 g/mol
Synonyms	Direct Black 146; Direct Black EX; C.I. 31760; Direct Deep Black EW; Pontamine Black EWN; Sirius Black VSG; Aizen Direct Deep Black BH; Atul Direct Black D; Dinamine Black VSF; Solar Black B
EINECS	Contact for details

Quality Control

Our C.I. Direct Black 146 is manufactured under a stringent quality management system. Each batch is tested to ensure consistent strength, shade, and solubility, meeting the high standards required for industrial dyeing applications. Certificates of Analysis (COA) detailing key parameters such as dye content, shade, and solubility 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.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Identification	Conforms (IR / HPLC)
Dye Content	≥ 95% (Typical)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Shade	Conforms to Standard
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0

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