Description

Chlorazol Black Bh is a high-purity, synthetic diazo dye belonging to the direct dye class, known for its strong affinity to cellulose fibers. Its primary value lies in its excellent substantivity and deep, intense black coloration, making it a critical component for achieving durable and vibrant shades. This product is essential for manufacturers in the textile, leather, and paper industries seeking reliable and consistent dyeing performance for natural fibers like cotton and viscose.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, and other cellulosic fibers to produce deep black and navy shades with good wash and light fastness.
• Leather Finishing: Used in the dyeing of leather goods, providing rich, uniform color for products such as shoes, bags, and upholstery.
• Paper Coloring: Employed in the production of colored papers, including specialty packaging, decorative papers, and security documents.
• Biological Staining: Acts as a histological stain in laboratory settings for microscopic examination of tissue samples.
• Ink Formulation: A pigment source in the manufacture of certain inks, particularly for industrial marking and coding.
• Wood Staining: Used for imparting color to wood surfaces in furniture and decorative woodworking applications.

Basic Information

Product Name	Chlorazol Black Bh
CAS No.	2429-73-4
Molecular Formula	C34H25N9Na2O7S2
Molecular Weight	781.73 g/mol
Synonyms	Direct Black 38; C.I. 30235; Aizen Direct Deep Black BH; Amanil Direct Deep Black BH; Atlantic Direct Deep Black BH; Benzo Deep Black BH; Chlorazol Black E; Diamine Deep Black BH; Direct Deep Black BH; Direct Deep Black E; Pontamine Black BH
EINECS	219-373-6

Quality Control

Our Chlorazol Black Bh is manufactured under a stringent quality management system. Every batch is tested to ensure it meets precise specifications for color strength, shade, solubility, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and conformance is provided with each shipment to guarantee batch-to-batch consistency and reliability for your industrial processes.

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). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Black to Bluish-Black Powder
Identification (IR)	Conforms to Standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Insoluble Matter	Max. 1.0%
Shade & Strength	Match to Reference Standard (± 5%)
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.