Description

Direct Black 168 is a high-performance, synthetic diazo direct dye widely used for its deep, intense black shade and excellent build-up properties. This product is valued for its strong affinity to cellulosic fibers, providing good wash and light fastness in demanding industrial applications. It is primarily utilized by textile manufacturers, leather tanneries, and paper producers seeking a reliable and cost-effective black colorant for their processes.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers to achieve a deep black color.
• Leather Processing: Used in the dyeing of leather goods, including footwear, apparel, and upholstery, for uniform and rich black finishes.
• Paper Coloration: Employed in the production of colored papers, specialty packaging, and decorative papers where a deep black hue is required.
• Ink Formulation: A key component in the manufacture of certain types of inks for industrial marking and printing.
• Blending and Shading: Used in combination with other direct dyes to create specific shades or to adjust the tone of black in various substrates.

Basic Information

Product Name	Direct Black 168
CAS No.	85631-88-5
Molecular Formula	C34H25N9Na4O13S4
Molecular Weight	984.85 g/mol
Synonyms	Direct Black 168; C.I. Direct Black 168; Direct Black EX; Direct Black G; Direct Deep Black EW; Pontamine Black EWN; Atul Direct Black D-168; Amanil Black G; Benzo Black G; Diazol Black EW
EINECS	Contact for details

Quality Control

Our Direct Black 168 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key parameters including color strength, shade, solubility, and fastness properties. A Certificate of Analysis (COA) detailing these specifications is provided with every shipment to support your quality assurance protocols.

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 resealed tightly after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Fastness to Washing	≥ 3-4 (ISO 105-C03)
Fastness to Light	≥ 4 (ISO 105-B02)

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