Description

Acid Black 64 is a high-performance, synthetic azo dye belonging to the acid dye class, valued for its deep, intense black shade and excellent colorfastness properties. It is a critical component for achieving durable and vibrant coloration on protein-based fibers like wool, silk, and nylon, as well as in specialized applications for leather and paper. This dye is essential for manufacturers in the textile, leather finishing, and specialty paper industries seeking reliable, consistent, and high-quality black coloration solutions.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing excellent wash and light fastness.
• Leather Finishing: Used for dyeing leather goods, offering rich, penetrating black shades with good adhesion.
• Paper Coloring: Employed in the production of specialty papers, including decorative and packaging papers, requiring a deep black hue.
• Ink Formulation: A potential component in the manufacture of certain inks for non-critical applications.
• Biomaterial Staining: Used in laboratory and histological settings for staining biological materials.

Basic Information

Product Name	Acid Black 64
CAS No.	12238-84-5
Molecular Formula	C22H14N6Na2O9S2
Molecular Weight	624.49 g/mol
Synonyms	Acid Black 64; C.I. 20265; Acid Leather Black NB; Naphthalene Black 12B; Acid Black NB; Black NB; Amido Black 10B (related); Acid Black 10B (related); Azo Black
EINECS	235-447-6

Quality Control

Our Acid Black 64 is manufactured under a stringent 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 impurity profiles to meet industry specifications. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics 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 light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Black to dark brown powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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