Description

Direct Black Bh is a high-performance, synthetic direct dye belonging to the benzidine derivative class, widely recognized for its deep, intense black shade and excellent substantivity to cellulosic fibers. Its primary value lies in delivering consistent, level dyeing with good fastness properties, making it a cost-effective choice for industrial textile coloration. This product is essential for manufacturers in the textile and leather industries seeking reliable and efficient black dyes for cotton, viscose, and other natural fibers.

Application

• Primary dyeing of cotton and viscose rayon fabrics and yarns.
• Coloration of paper and specialty paper products.
• Dyeing of leather to achieve deep black finishes.
• Used in the production of inks for specific printing applications.
• As a colorant for wood staining and other non-textile substrates.

Basic Information

Product Name	Direct Black Bh
CAS No.	25180-19-2
Molecular Formula	C34H25N9Na2O7S2
Molecular Weight	781.72 g/mol
Synonyms	Direct Black BH; C.I. Direct Black 19; Direct Black B; Direct Deep Black BH; Direct Deep Black E; Amanil Black BH; Atul Direct Black BH; Benzo Deep Black BH; Pyrazol Black BH; Sirius Black BH
EINECS	246-680-1

Quality Control

Our Direct Black Bh is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Every lot is tested against established specifications for key parameters such as color strength, shade, solubility, and impurity profile. A Certificate of Analysis (COA) detailing these results is provided with each shipment to guarantee compliance with your technical requirements.

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 incompatible materials and sources of heat. Under these conditions, the product maintains its stability for extended periods.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Solubility in Water	Conforms
Fastness Properties	To be specified per grade

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