Description

Acid Black 2 is a synthetic acid dye belonging to the azo dye class, identified by CAS No. 80316-29-6. It is valued for its strong affinity to protein fibers like wool, silk, and nylon, providing deep, durable black shades with good wet fastness properties. This dye is essential for manufacturers in the textile and leather industries seeking consistent, high-quality coloration for their products.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve deep black and dark grey shades.
• Leather Finishing: Used in the dyeing of leather goods, including apparel, footwear, and accessories, for uniform and rich color.
• Paper Staining: Employed for specialty paper coloring where a strong, acid-fast black hue is required.
• Ink Formulation: A colorant component in the manufacture of certain inks, particularly for non-food contact materials.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic tissue analysis.

Basic Information

Product Name	Acid Black 2
CAS No.	80316-29-6
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	616.49 g/mol
Synonyms	Acid Black 2; C.I. Acid Black 2; Acid Leather Black NB; Naphthalene Black 12B; Acid Black NB; Azo Black; Acid Black B; Lissamine Black 12B
EINECS	Contact for details

Quality Control

Our Acid Black 2 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 performance metrics is provided with each shipment to guarantee 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Black to dark brown powder
Identification (IR)	Conforms to standard
Assay (Dye Content)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Shade	Conforms to standard pattern
Fastness Properties	Contact for details

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