Description

Acid Black 220 is a high-performance, synthetic acid dye belonging to the azo chemical class, valued for its deep, rich black shade and excellent fastness properties. This dye is engineered to deliver superior color yield and consistency, making it a critical component for achieving durable and vibrant coloration in demanding industrial applications. It is primarily utilized by manufacturers in the textile, leather, and paper industries seeking reliable and high-quality black dyeing solutions.

Application

• Textile Dyeing: Primary application for dyeing nylon, silk, and wool fibers to achieve deep, wash-fast black shades.
• Leather Processing: Used for coloring leather goods, providing uniform penetration and good lightfastness.
• Paper Staining: Employed in the production of specialty papers requiring intense, non-bleeding black coloration.
• Ink Formulation: A component in the manufacture of certain industrial inks and toners.
• Biomaterial Staining: Potential use in laboratory settings for histological staining applications.

Basic Information

Product Name	Acid Black 220
CAS No.	152287-07-5
Molecular Formula	C40H23N7Na4O13S4
Molecular Weight	1083.87 g/mol
Synonyms	Acid Black 220; C.I. Acid Black 220; Black 220; Acid Leather Black 220; Nylosan Black N-2BL; Telon Black K-BL; Acid Black WAN; Acid Black NT; Acid Black MR
EINECS	Contact for details

Quality Control

Our Acid Black 220 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against established specifications for critical parameters including purity, shade, strength, and solubility. A Certificate of Analysis (COA) detailing these results 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). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Black to dark bluish-black powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade & Strength	Within agreed tolerance vs. standard
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.