Description

Direct Black 112 is a high-performance, disazo direct dye renowned for its deep, intense black shade and excellent build-up properties on cellulosic fibers. It is a critical component for achieving cost-effective, high-volume dyeing and printing in the textile industry, offering good wash fastness and leveling characteristics. This dye is primarily utilized by manufacturers in the textile sector for dyeing cotton, viscose, and paper, as well as in the leather and ink industries.

Application

• Textile Dyeing: Primary application for exhaust and continuous dyeing of cotton, rayon, and other cellulosic fabrics to produce deep black shades.
• Paper Coloring: Used in the mass coloration of paper and paperboard where a deep, uniform black color is required.
• Leather Finishing: Employed in the dyeing of leather goods, providing a rich black color with good penetration.
• Ink Manufacturing: Serves as a colorant in the formulation of certain types of inks, including stamp pad and flexographic inks.
• Batch Dyeing Processes: Well-suited for beck, jet, and beam dyeing machines due to its good solubility and migration properties.

Basic Information

Product Name	Direct Black 112
CAS No.	12217-52-6
Molecular Formula	C34H25N9Na4O13S4
Molecular Weight	1023.86 g/mol
Synonyms	Direct Black 112; C.I. 34145; Direct Deep Black EW; Pontamine Black EWN; Direct Black EW; Direct Black G; Direct Black NB; Benzo Deep Black EWN
EINECS	Contact for details

Quality Control

Our Direct Black 112 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including shade, strength, solubility, and fastness properties. A Certificate of Analysis (COA) detailing these results is provided with every shipment to guarantee compliance with your specifications.

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 containers are sealed after use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Identification	Conforms (IR / TLC)
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Solubility in Water	Conforms
Shade on Cotton	Conforms to Standard
Fastness Properties	Wash Fastness: ≥ 3; Light Fastness: Contact for details

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